U.S. Department of Commerce

National Bureau of Standards

NBS

PUBLICATIONS

NATL INST. OF STAND & TECH

AlllOb AS11Q1

NBS Special Publication 260

NBS Standard

Reference Materials

Catalog

1979-80 Edition
NATIONAL BUREAU OF STANDARDS

The National Bureau of Standards 1 was established by an act of Congress March 3, 1901 . The

Bureau's overall goal is to strengthen and advance the Nation's science and technology and

facilitate their effective application for public benefit. To this end, the Bureau conducts

research and provides: (1) a basis for the Nation's physical measurement system, (2) scientific and technological services for industry and government, (3) a technical basis for equity in trade, and (4) technical services to promote public safety. The Bureau's technical work is performed by the National Measurement Laboratory, the National Engineering Laboratory,

and the Institute for Computer Sciences and Technology.

THE NATIONAL MEASUREMENT LABORATORY provides the national system of

physical and chemical and materials measurement; coordinates the system with measurement

systems of other nations and furnishes essential services leading to accurate and uniform

physical and chemical measurement throughout the Nation's scientific community, industry,

and commerce; conducts materials research leading to improved methods of measurement,

standards, and data on the properties of materials needed by industry, commerce, educational

institutions, and Government; provides advisory and research services to other Government

Agencies; develops, produces, and distributes Standard Reference Materials; and provides

calibration services. The Laboratory consists of the following centers:

Absolute Physical Quantities2 — Radiation Research — Thermodynamics and

Molecular Science — Analytical Chemistry — Materials Science. THE NATIONAL ENGINEERING LABORATORY provides technology and technical

services to users in the public and private sectors to address national needs and to solve national problems in the public interest; conducts research in engineering and applied science

in support of objectives in these efforts; builds and maintains competence in the necessary

disciplines required to carry out this research and technical service; develops engineering data and measurement capabilities; provides engineering measurement traceability services; develops test methods and proposes engineering standards and code changes; develops and

proposes new engineering practices; and develops and improves mechanisms to transfer

results of its research to the utlimate user. The Laboratory consists of the following centers:

Applied Mathematics — Electronics and Electrical Engineering2 — Mechanical

Engineering and Process Technology2 — Building Technology — Fire Research —

Consumer Product Technology — Field Methods.

THE INSTITUTE FOR COMPUTER SCIENCES AND TECHNOLOGY conducts

research and provides scientific and technical services to aid Federal Agencies in the selection,

acquisition, application, and use of computer technology to improve effectiveness and

economy in Government operations in accordance with Public Law 89-306 (40 U.S.C. 759), relevant Executive Orders, and other directives; carries out this mission by managing the Federal Information Processing Standards Program, developing Federal ADP standards

guidelines, and managing Federal participation in ADP voluntary standardization activities; provides scientific and technological advisory services and assistance to Federal Agencies; and

provides the technical foundation for computer-related policies of the Federal Government.

The Institute consists of the following divisions:

Systems and Software — Computer Systems Engineering — Information Technology.

'Headquarters and Laboratories at Gaithersburg, Maryland, unless otherwise noted; mailing address Washington, D.C. 20234.

; Some divisions within the center are located at Boulder, Colorado, 80303.

The National Bureau of Standards was reorganized, effective April 9, 1978.
NBS Special Publication 260

NBS Standard

Reference Materials

Catalog £ i_

1979-80 Edition

Office of Standard Reference Materials

National Measurement Laboratory

National Bureau of Standards

Washington, D.C. 20234

CAUTION: The values given in the following sections are listed primarily as a guide to purchase. The values shown are nominal and may differ from those shown on

the certificates. Space limitations have required that some

values be omitted. For these reasons, the certificates issued with the standards should always be consulted to obtain the certified values.

U.S. Department of Commerce

Juanita M. Kreps, Secretary

Jordan J. Baruch, Assistant Secretary

for Science and Technology

National Bureau of Standards

Ernest Ambler, Director

Issued April 1979
Library of Congress Catalog Card Number 79-600021

National Bureau of Standards Special Publication 260

Supersedes NBS Spec. Publ. 260 - 1975-76 Edition

Nat. Bur. Stand. (U.S.), Spec. Publ. 260-1979-80 catalog, 107 pages (Apr. 1979) CODEN: XNBSAV

U.S. GOVERNMENT PRINTING OFFICE

WASHINGTON: 1979

For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402

Stock No. 003-003-02048-6 Price $3

(Add 25 percent additional for other than U.S. mailing).
CONTENTS

Page INTRODUCTION 1

Definitions 1

Preparation and Availability of

Standard Reference Materials 2

Ordering 2 Terms 3 Domestic Shipments 3 Foreign Shipments 3 CERTIFIED CHEMICAL

COMPOSITION STANDARDS 14

Steels (chip form) 14 Plain carbon

Low alloy

High alloy

Stainless

Tool

Steels (granular form) 17

Steels (solid form) 17 Ingot iron and low alloy

Special ingot irons and low alloy

Stainless

Specialty

High-temperature alloys

Tool

Steelmaking Alloys 23

Cast Irons (chip form) 24

Cast Steels, White Cast Irons, Ductile

Irons, and Blast Furnace Irons

(solid form) 24

Nonferrous Alloys (chip form) 25

Aluminum "Benchmarks"

Cobalt

Copper

Copper "Benchmarks"

Lead

Magnesium

Nickel

Nickel Superalloy, Trace Elements

Nickel oxide

Selenium

Tin

Titanium

Zinc

Zirconium

Nonferrous Alloys (solid form) 30

Aluminum "Benchmarks"

Copper

Copper "Benchmarks"

Lead

Nickel

Titanium

Zinc

Page Zirconium

Gases in Metals 35

High-Purity Metals 36

Electron Probe Microanalytical

Standards 36

Primary, Working, and Secondary

Standard Chemicals 38

Microchemical Standards 38

Clinical Laboratory Standards 39

Biological Standards 39

Environmental Standards 41 Analyzed gases Analyzed liquids and solids Permeation tubes

Industrial Hygiene Standards 44

Forensic Standards 45

Hydrocarbon Blends 45

Metallo-Organic Compounds 46

Fertilizers 46

Ores 47

Minerals, Refractories, Glasses,

and Carbides 48

Cement 50 Trace Element Standards 50

Nuclear Materials 52

Special nuclear materials

Plutonium assay Plutonium isotopic

Uranium assay Uranium isotopic

Neutron density standards

Fission track glass standards

Isotopic Reference Standards 53

CERTIFIED PHYSICAL PROPERTY

STANDARDS 54 Ion Activity Standards 54

pH standards

pD standards Ion selective electrodes Mechanical and Metrology Standards 55

Magnification

Coating thickness

Glass

Elasticity

Density

Polymer

Rheology

Heat Standards 61 Superconductive thermometric fixed

point devices

Freezing points

Defining fixed points

Determined reference points

in
Page Melting points

Calorimetric

Combustion

Solution

Heat source Enthalpy and heat capacity

Vapor pressure Thermal conductivity

Thermal expansion

Thermocouple materials

Thermal resistance

Magnetic Standards

Magnetic susceptibility

Magnetic moment

Paramagnetic resonance

Optical Standards

Spectrophotometric

Thermal emittance

Refractive index

Radioactivity Standards

Alpha-particle standards

Beta-particle and gamma-ray gas standards

Alpha-particle, beta-particle, gammaray, and electron-capture solution

standards

Contemporary standard for carbon-14

dating laboratories

Environmental standards

Low energy photon sources Gamma-ray "point-source" standards

Radium gamma-ray solution standards

Radium solution standards for radon

analysis

Radioactivity standard reference

materials currently not in stock

Metallurgical

Mossbauer

X-ray Diffraction

Gas Transmission

Permittivity

Reference Fuels

Resistivity

ENGINEERING TYPE STANDARDS ... 73

Standard Rubber and RubberCompounding Materials 73

Reference Magnetic Tapes 73

Centerline Drawings, OCR-B 74

Sizing Standards 74

Glass spheres for particle size Turbidimetric and fineness (cement)

Color Standards 74

X-ray and Photographic Standards .... 75

g4 Surface Flammability Standards 75

Smoke Density Chamber Standards .... 76

Water Vapor Permeance 76

Tape Adhesion Testing Standard 76

RESEARCH MATERIALS 77

SPECIAL REFERENCE MATERIALS . . 79

67 STANDARD REFERENCE

MATERIALS TO BE

DISCONTINUED 81 OTHER SERVICES OF THE NATIONAL

BUREAU OF STANDARDS 82

Calibration and Related

Measurement Services 82

Standards Information Service 84

Standard Reference Data 84

Technical Information and Publications ... 84

GUIDE FOR REQUESTING THE

DEVELOPMENT OF STANDARD

REFERENCE MATERIALS 85

CERTIFIED REFERENCE MATERIALS

71 FROM OTHER NATIONS 86

71

71 INDICES 88

7172 Alphabetical Index 88

72 Numerical Index to SRM Certificates 95

72

I

iv
National Bureau of Standards

Catalog of Standard Reference Materials - 1979

This Catalog lists those Standard Reference Materials (SRM's), Research Materials (RM's), and Special Reference Materials (GM's) that are available from the National Bureau of Standards (NBS), and those

that are soon to be available. The Catalog describes these materials as to their certified characterization,

unit size, and type, as well as providing ordering information. Prices for these materials are listed separately in annual supplements to this Catalog.

Key words: Analysis; characterization; composition; properties; Standard Reference Materials; Research

Materials; Materials.

Introduction

The National Bureau of Standards issues over 1000

different materials through its Standard Reference

Materials Program. These materials are primarily

Standard Reference Materials (SRM's) certified for

their chemical composition, chemical property, or

physical property, but also include Research Materials (RM's) and Special Reference Materials

(GM's). All SRM's, RM's, and GM's, bear distin- guishing names and numbers by which they are permanently identified. Thus, each SRM, RM, or GM bearing a given description is identical (within

the required or intended limits) to every other

sample bearing the same designation—with the ex- ception of individually certified items, which are

further identified by serial number.

The first materials issued by NBS were called Standard Samples and consisted of a group of ores,

irons, and steels certified for their chemical composition. Since the mid-1960's these materials have been

issued as Standard Reference Materials, and cover a wide range of chemical and physical properties and an

equally wide range of measurement interests.

Definitions

The different terms, SRM, RM, or GM, are used

to indicate differences in the types of information

supplied and in the purposes for which the material is intended.

Standard Reference Materials have been characterized by the National Bureau of Standards for some

chemical or physical property and are issued with a

Certificate that gives the results of the charaterization.

These results are obtained by one of the three established routes of certification, i.e., measurement of the

property using: (1) a previously validated reference method, (2) two or more independent, reliable measurement methods, or (3) an ad hoc network of

cooperating laboratories, technically competent and

thoroughly knowledgeable with the material being

tested. These routes are described in detail in, "The

Role of Standard Reference Materials in Measurement Systems," NBS Monograph 148, 54 pages (Jan.

1975). SRM's are defined as being well-characterized

and certified materials produced in quantity to improve measurement science. They are prepared and

used for three main purposes: To help develop accurate methods of analysis (reference methods); To

calibrate measurements systems used to: (a)facilitate the exchange of goods, (b) institute quality control,

(c) determine performance characteristics, or (d) measure some property at the limit of the state-of-theart; To assure the long-term adequacy and integrity of

quality control processes. In these ways, SRM's

help ensure the compatibility and accuracy of

measurements in many facets of national life

from science and technology to trade and commerce.

Research Materials, unlike SRM's, are not certified. Instead of a Certificate, RM's are issued with a "Report of Investigation," the sole authority of which

is the NBS staff member who authored the report. An

RM is intended primarily to further scientific or

technical research on that particular material. The

principal consideration in issuing an RM is to provide

a homogeneous material so that investigators in different laboratories are assured that they are investi- gating the same material.

Special Reference Materials differ from both SRM's

and RM's in that NBS does not participate in the

I
characterization of these materials. GM's are refer- ence materials produced and certified or guaranteed

by other government agencies, standards bodies, or other non-profit organizations. When deemed to be in the public interest and when alternate methods of

national distribution do not exist, NBS acts as the

distributor for such materials. This service is available

to all organizations that qualify and have reference materials that would help solve a national measure- ment problem.

SRM Catalog

New Catalogs of NBS Standard Reference Materials are published approximately every three years,

listing new materials available, materials in preparation, and deleting discontinued materials. To keep the Catalog current between editions, annual supplements are published that list: the current prices

charged, new materials, discontinued materials (with

suggested substitutes), and revised Certificates. The materials listed in this Catalog are separated

into several major groups: Chemical Composition

Standards, Physical Property Standards, Engineering

Type Standards, Research Materials, and Special

Reference Materials. The first three groups include

SRM's only and are subdivided into the categories

shown in the Table of Contents. The numerical values given in the Catalog to describe the materials' properties are nominal values

only and are to be used only as guides in selecting the

materials. They are not to be used in lieu of the

Certificate issued with the material. Note: Some SRM's are not issued with Certificates. These exceptions are noted in both the SRM

description and the numerical index.

The numerical index provides the SRM, RM, and

GM numbers of all materials listed in the Catalog,

together with either the date of the current Certificate or a note to explain the absence of a Certificate. An alphabetical index is also provided. For the most part, this index lists SRM catagories and the primary constituent or element of an SRM, rather

than the name of specific SRM's. RM's and GM's are

listed as groups only.

Preparation and Availability of

Standard Reference Materials

New and renewal SRM's are being prepared continually. When completed, prospective users are notified directly of their availability, and the SRM is described in the next catalog supplement.

In preparing renewal SRM's, the intention is to complete the renewal before the supply of the existing

SRM is exhausted. Frequently, this is not possible

and the SRM will be out-of-stock for a time. When

this occurs, those ordering the material are so notified and, when feasible, of possible substitutes. (See,

Ordering below). When the renewal becomes available, customers that have requested either the previous

lot or the renewal are promptly notified. Renewal SRM's will not usually be identical to

their predecessors, but will be quite similar especially

with regard to the characteristics certified. Generally,

the renewal can be used in place of its predecessor. As

an example, when the first 0. 1 percent carbon Besse- mer steel was prepared in 1909, it was called Standard

Sample No. 8. During the following years, a number

of renewals, 8a, 8b, etc., were prepared. The current SRM 8j, Bessemer Steel (Simulated), 0.1% Carbon,

represents the 10th renewal batch of this material.

While each of these batches differ somewhat in detailed anlaysis from one batch to another, all have

had the relatively high level of phosphorus, sulfur,

and nitrogen, and low alloy metal content characteristic of this type of material.

It is not possible to supply preceding numbers of a renewal series when the stock is exhausted. If little demand exists or an alternate source of supply be- comes available for a material, production may be

discontinued permanently.

Ordering

Orders should be addressed to:

Office of Standard Reference Materials

Room B311, Chemistry Building

National Bureau of Standards

Washington, D.C. 20234

Telephone (301) 921-2045

Orders should give the amount (number of units),

catalog number, and name of the material requested.

For example: 1 each, No. llh, Basic-Open-Hearth

Steel, 0.2 percent C. The materials described in this Catalog are distributed in the units listed or in multiples thereof only.

Acceptance of an order does not imply acceptance

of any provision set forth in the order contrary to the

policy, practice, or regulations of the National Bureau

of Standards or the U.S. Government.

Orders received for "out-of-stock" materials are cancelled if only out-of-stock items are ordered. On

other orders, shipment is made of available materials and out-of-stock items are cancelled. Backorders are not accepted for out-of-stock materials; if a renewal lot of material is available, it will be furnished

automatically.

2
Terms

Prices quoted are in U.S. dollars, and are published in the SRM Price List (Supplement to this Catalog). New SRM Price Lists, when issued, are sent

to users who have made purchases during the preceeding twelve months and to persons or organizations

who have requested them. These prices are subject to revision without notice and orders will be billed for

the prices in effect at the time of shipment. No

discounts are given on purchases of SRM's, RM's, or GM's.

Remittances of the purchase price need not accompany purchase orders. Payment of invoices is ex- pected within 30 days of receipt of an invoice. Payment on foreign orders may be made by any of the

following:

(a) UNESCO coupons.

(b) banker's draft against U.S.A. bank,

(c) bank to bank transfer to a U.S.A. bank,

(d) letter of credit on a U.S.A. bank, or

(e) by International Money Order.

Pro-forma invoice service will frequently require 6

to 8 weeks to process, and will be furnished only to those requiring such service. Letters of Credit may be used as advance payment

for SRM's. Letters of credit will be accepted from

banks in the United States only. Listed below are the

only documents that we will furnish:

(1) Six Commercial Invoices

(2) Packing List

(3) Certificate of Origin

(4) Airway Bill (This can only be furnished if material is shipped Collect; if shipped prepaid

International Air Parcel Post, receipts cannot

be furnished.)

If, however, the purchaser requests a different mode of

shipment, the shipment will be sent collect. For items

shipped collect NBS cannot "prepay and add" such

shipping charges to the invoice. Restricted categories

such as hydrocarbons, organic sulfur compounds,

compressed gases, rubber, rubber compounding materials, radioactive standards, and similar materials are shipped FOB Gaithersburg, Md.

Domestic Shipments

Shipments of material (except for certain restricted categories) intended for the United States, Mexico,

and Canada are normally shipped prepaid (providing

that the parcel does not exceed the weight limitations

as prescribed by Postal Laws and Regulations).

Foreign Shipments

The regulations of various nations covering the importation of SRM's, GM's, and RM's differ widely;

any attempt to list all possible variations would be

impractical. Therefore, where the shipping practices

outlined below do not apply, purchasers will be in- formed of the best method of shipment for their country.Most orders will be shipped by prepaid International Air Parcel Post. Exceptions are items in res- tricted categories and those shipments that exceed

parcel post weight limitations. These exceptions will be

shipped FOB Gaithersburg, Md., unless an agent

(shipping or brokerage firm) located in the U.S. is required. Where an agent is required, the purchaser

will be so notified and will be requested to designate an

agent of his choice. In this case, the material will be

packaged for overseas shipment and will be forwarded

to the agent FOB Gaithersburg, Md.

NOTE: Orders and inquiries submitted in English will be processed more rapidly than those requiring translations.

3
National Bureau of Standards

Catalogo de Materiales Patrones

de Referencia del ano 1979

En este catalogo figuran todos los Materiales Patrones de Referencia (SRM's), Materiales de

Investigacion (RM's) y Materiales Especiales de Referencia (GM's) que pueden ser obtenidos en el National Bureau of Standards (NBS) en la actualidad y aquellos que estaran disponibles en breve plazo. Estos materiales estan descritos en el catalogo en la misma forma que en el certificado haciendo referencia

al tamafio, clase, y caracteristicas asi como informacion para hacer los pedidos. Los precios figuran por separado en un suplemento anual de este catalogo.

Palabras Claves: Analisis; certificacion; caracterizacion; composicion; propiedades; Materiales de

Investigacion (RM's); Materiales Especiales de Referencia (GM's) y Materiales Patrones de Referencia (SRM's).

Introduction

NBS emite mas de 1000 materiales diferentes a

traves de su programa para SRM's. Estos materiales son principalmente SRM's que han sido certificados

por su composicion quimica y propiedades quimicas y

fiscas pero tembien incluye RM's y GM's. Todos los SRM's, RM's y GM's llevan nombres y numeros que

los identifican permanentemente. Cada SRM, RM o GM al cual se la ha dado una description determinada es identica a todas las otras muestras que llevan la misma designation (dentro de los limites requeridos

para su uso) con exception de aquellas que han sido

certificadas individualmente y a las cuales se les asigna un numero de serie. Los primeros materiales emitidos por el N.B.S.

fueron llamados "muestras patrones" (standard

samples) y consistian en un grupo de minerales,

hierros y aceros que habian sido certificados por su composicion quimica, pero a partir del ano de 1960 se

les disigno con el nombre de Materiales Patrones de

Referencia (SRM's) que cubre un campo mas amplio

de propiedades fisicas y quimicas y que refleja el interes por las medidas.

Definiciones

Los terminos SRM, RM, y GM son usados para

indicar las diferentes clases de informacion suministrada y el proposito al cual el material ha sido desti- nado.

Materials Patrones de Referencia: N.B.S. ha caracte- rizado los SRM's por algunas de sus propiedades

fisicas y quimicas y los emite con un certificado en el cual aparece el resultado de dicha caracterizacion.

Estos resultados son obtenidos por una de las tres vias de certificacion establecidas. Medida de la propiedad

usando:

(1) Un metodo de referencia con validez probada

previamente.

(2) Dos o mas metodos independientes de medidas

dignos de confianza.

(3) Una red de cooperativas de laboratorios tecni- camente competentes y con conocimiento cabal del material comprobado para este especifico proposito.

Estas vias han sido descritas detalladamente en "La

Funcion de los Materiales Patrones de Referencia en

el Sistema de Medidas" (The Role of Standard Reference Materials in Measurement Systems, NBS Monograph 148, 54 pages, Jan. 1975). Se ha definido los SRM's como materiales que se han certificado y analizado en cantidades suficientes para ser usados en

el mejoramiento de las ciencias de las medidas. Los

SRM's han sido preparados y usados con tres principales propositos: para ayudar a desarrollar metodos

de analisis de alta calidad (Metodos de Referencia);

para calibrar sistemas de medidas destinados a: (a) facilitar el intercambio de mercancias; (b) implantar

control de la calidad, (c) determinar las caracteristicas representadas y (d) llevar la medida de algunas pro- piedades al llmite de la Obra de Arte; y para asegurar un metodo de control de la calidad adecuado, duradero e integro. En esta forma los SRM's auydan a asegurar la compatibilidad y alta calidad de las medidas en muchos aspectos de la vida nacional desde

la ciencia y la tecnologia hasta los oficios y el comercio.

4
Materiales de Investigation (RM's): A diferencia de

los SRM's, estos no estan certificados. En lugar de un

certificado, ellos son emitidos con un informe de

investigation (Report of Investigation) el cual es responsabilidad del miembro del cuerpo de cientificos del NBS que produce el informe. RM's estan destinados principalmente a fomentar la investigation cientifica y tecnica sobre determinado material con la principal concideracion de proveer un material homogeneo a los cientificos en los diferentes laboratories, con la seguridad de que estan investigando el mismo

material.

Los Materiales Especiales de Referenda (GM's)

se distinguen de los SRM's y de los RM's en que el N.B.S. no participa en su investigation. Los GM's

son materiales de referencia producidos y certifi- cados por otras agendas del gobierno, otros grupos

de patrones de referencia o algunas organizaciones no lucrativas. N.B.S. actua como el distribuidor

de dichos materiales cuando considera que es del

interes publico o cuando no hay otro medio

mejor para la distribution national. Este servicio esta

al alcance de las organizaciones que llenen los requisites requeridos y tengan materiales de referencia que

pudieran ayudar a resolver un problema national de

medida.

Cataiogo de Materiales Patrones de Referencia

El Programa de los SRM's del N.B.S. publica nuevos catalogos cada 3 anos en los cuales se registran

los nuevos materiales disponibles, materiales en pre- paration y materiales que han sido descontinuados.

Para mantener el cataiogo al corriente entre edicio- nes se publica un suplemento con la lista de los precios actuales, nuevos materiales, materiales des- continuados (con algunas sugerencias de sustitutos) y

certificados revisados.

Los materiales que figuran en el cataiogo han sido

clasificados en varios grandes grupos: Patrones de

Composition Quimica, Patrones de Propiedades Fisicas, Patrones de Tipo de Ingenieria y Patrones Generales. Los 3 primeros tipos incluyen solamente SRM's

y estan divididos en diferentes sub-grupos que apare- cen en el Indice General.

Los valores numericos ofrecidos en el cataiogo que

describen las propiedades de los materiales son valores nominales para ser usados solamente como guias

al seleccionar los materiales. Estos valores numericos no deben ser usados en lugar del certificado emitido con el material.

Nota: Algunos SRM's no son emitidos con certifi- cados. Estas excepciones aparecen en la description

de SRM's y en el indice numerico.

El indice numerico ofrece numeros para todos los materiales que aparecen en el cataiogo junto con la fecha vigente o en su lugar una nota explicando la ausencia del certificado. Un indice alfabetico es ofrecido donde se enumera

los SRM's y el componente o elemento principal en

lugar del nombre del SRM's en cuestion. Los SRM's

y GM's aparecen en grupos solamente.

Preparacibn Y Disponibilidad de los Materiales

Patrones de Referencia.

Continuamente se estan renovando y preparando

nuevos SRM's. Cuando estan disponibles se notifica a

los interesados y se describen en el proximo suplemento del cataiogo.

La renovation de los SRM's tiene como finalidad asegurar la existencia de los materiales antes que se agoten sus reservas. Algunas veces esto no es posible y algunos materiales estan fuera del mercado por un

tiempo. Cuando esto ocurre se le notifica a aquellos

que han encargado el material informandoles cuando

podran ser obtenidos o la posibilidad de sustitutos. Cuando el material renovado vuelve a estar disponible se le notifica a los clientes que lo habian solicitado

previamente (vea pedidos). Por lo general el material

de renovation no sera identico a su predecesor pero

sera bastante similar en especial a lo que a sus caracteres certificados se refiere. En general el material renovado puede ser usado en lugar de su predecesor. Por ejemplo cuando el primer acero Bessemer con 0.1 por ciento de Carbono fue preparado en el ano 1909 fue designado como "Standard Sample No.

8". Durante los anos subsiguientes fueron preparados

lotes de renovacion 8a, 8b etc. En la actualidad esta disponible el SRM 8j que representa la decima reno- vation del acero Bessemer con 0.1 por ciento de

Carbono. Si bien cada uno de estos lotes difiere en

algo en cuanto al analisis detallado entre uno otro

lote, todos tienen el nivel relativamente alto de conte- nido de fosforo, azufre, nitrogeno y metal de baja

aleacion que es caracteristica de este material.

Una vez agotadas las existencias no es posible

suministrar numeros precedentes de una serie de

renovaciones. Si existe poca demanda o se dispone de

otra fuente de suministro de determinado material, la production puede ser descontinuada en forma permanente.

5
Pedidos

Los pedidos deberan ser hechos a la siguiente

direction. Office of Standard Reference Materials

Room B311, Chemistry Building

National Bureau of Standards

Washington, D.C. 20234

Telefono (301) 921-2045

En los pedidos se debera indicar la cantidad (Nu- mero de unidades), el mimero del catalogo y el nombre del material ordenado. Por ejemplo: una

muestra, No. llh, Basic-open-Hearth Steel, 0.2 por

ciento C. Estos materiales son distribuidos solamente

en las medidas que figuran en la lista. La aceptacion

de un pedido no implica la aceptacion de ninguna

estipulacion que vaya en contra de la politica, practica o regulaciones del N.B.S. o del Gobierno de los E.U. Pedidos que se reciban de materiales "agotados"

son cancelados, si se ha pedido solamente materiales

agotados. Si el pedido incluye otros materiales disponibles se envian estos y se cancelan los materiales

agotados. No se aceptan pedidos de materiales agotados. Si un lote de material de renovation esta desponible sera suministrado automaticamente.

Los precios estan fijados en moneda de los E.U. y son publicados en la lista de precios de los SRM's

(suplemento del catalogo). Cuando las nuevas listas de precios son emitidas se les envian a los clientes que

han hecho compras en el curso de los ultimos doce

meses y a las personas y organizaciones que las soliciten. Estos precios estan sujetos a revisiones sin previa

notification y los pedidos se enviaran con los precios

que esten vigentes en el momento del despacho de la mercancia.

Las ordenes de compra no necesitan ir acompanadas del valor de la compra. Se espera que las facturas sean pagadas dentro de los treinta dias despues de

recibidas. El pago de pedidos desde el extrajero se puede hacer mediante cualquiera de las siguientes

vias:

a) Cupones de la Unesco

b) Giro bancario contra un banco en los E.U.

c) Transferencia bancaria

d) Carta de Credito en un banco de los E.U.

(ver nota)

e) Giro International.

Suele requirir ocho semanas procesar facturas pro- forma y seran suministradas solamente a aquellos que

requieran tal servicio. Nota: Se puede emplear cartas de credito para

pagar por adelantado los SRM's. Se aceptaran unicamente cartas de credito de bancos en los E.U. A

continuation se indican los unicos documentos que

seran suministrados.

1) Seis facturas comerciales.

2) Lista de embalaje.

3) Certificado de origen.

4) Factura de embarque aereo (solamente si el flete se remite a ser pagado). No se suministrara

recibo cuando la mercancia es enviada por el Servicio Postal Aereo Internacional (Porte pagado).

Env'ios Dom6sticos

Los envios de materiales (a exception de ciertas categorias restringidas) destinados a los E. U. y Canada por lo general son remesados con importe

pagado (siempre cuando el paquete no exceda las limitaciones prescritas por las leyes y el reglamento

postal). Sin embargo, si el comprador solicita una

forma diferente de envio, la mercancia se enviara con

flete por pagar. N.B.S. no Paga Por Tales Fletes. Algunas categorias restringidas como hidrocarburos,

compuestos organicos de azufre, gases comprimidos,

materiales para compuestos de goma, muestras ra- dioactivas y materiales semejantes seran enviados

desde Gaithersburg, MD. por expreso con flete por

pagar.

Envios al extranjero

Las regulaciones que cubren la importation de

SRM's, GM's y RM's de algunos paises difieren grandemente. Hacer una lista de estas diferencias no

tiene objeto por lo tanto los compradores deberan

informarse de cual es el mejor metodo de envio

existente en sus paises cuando la siguiente lista de

practicas no es aplicable.

La mayoria de los pedidos con flete pagado seran enviados por Encomienda Postal Internacional Aerea. Son excepciones los articulos en categorias

restringidas y aquellos que excedan las limitaciones de

peso establecidas por la oficina postal de paquetes.

Estas excepciones seran enviadas por expreso con

flete por cobrar a menos que un agente (empresa de

transporte o corredor) ubicado en los E.U. sea requerido. Si es necesario hacer el envio a traves de un

agente se notificara al comprador para que escoja al agente que desee. En este caso el material sera embalado para embarque maritimo y despachado por

expreso con flete por cobrar a la empresa en las E.U. que ha sido designada como agente. Nota: Pedidos y consultas presentados en idioma

ingles seran tramitados en forma mas rapida que

aquellos que requieran traduction.

6
National Bureau of Standards (NBS)

Catalogue des Materiaux Standard de Reference

1979

Ce catalogue repertorie les materiaux standard de reference (Standard Reference Materials, SRM's),

les materiaux de recherches (Research Materials, RM's) et les materiaux speciaux de references (Special Reference Materials, GM's) disponibles au Bureau National des Standards (National Bureau of Standards, NBS) et ceux qui seront bientot disponibles. Pour chacun de ces materiaux, le catalogue donne les caracteristiques certifiees, la description de l'echantillon (dimensions, forme), et fournit des renseignements commerciaux. Les prix sont portes separement dans des supplements annuels a ce catalogue.

Mots-cles: Analyse; certification; caracterisation; composition; proprietes; Research Materials; Special Reference Materials; Standard Reference Materials.

Introduction

Le Bureau National des Standards (National Bureau of Standards, NBS)* delivre plus de 1000 materiaux differents grace a son programme de Materiaux

Standard de Reference (Standard Reference Materials, SRM's)*. Ces materiaux sont principalement

des SRM's certifies pour leur composition chimique,

leur propriete chimique ou leur propriete physique,

mais comprennent egalement des materiaux de re- cherche (Research Materials, RM's)* et des materiaux specials de references (Special References Materials, GM's).* Tous les SRM's, RM's et GM's portent

des noms et des numeros distinctifs qui permettent de

les identifier en permanence. Ainsi, chaque SRM,

RM, ou GM designe par une description donnee est identique (dans les limites specifiees ou visees) a tous

les autres echantillons de meme designation, a l'exception des articles certifies isolement, qui sont identifies en plus par un numero de serie.

*Nota: Ces expressions ou les abreviations correspondentes seront utilisees par la suite dans ce document.

Les premiers materiaux delivres par le NBS portaient le nom d'echantillon standard (Standard Samples) et comprenaient un groupe de minerais, de fers, et d'aciers, certifies pour leur composition chimique.

Depuis le milieu des annees 60, ces materiaux ont ete delivres sous la forme de "Standard Reference Materials" et couvrent une large gamme de proprietes

physiques et chimiques, et une gamme tout aussi large

de domaines d'interet.

Definitions

L'emploi des differents termes SRM, RM, ou GM,

est destine a differencier les types d'informations

fournies et les utilisations auxquelles est destine le materiau.

Standard Reference Materials. lis sont caracterises par le NBS pour une propriete physique ou chimique

donnee et sont delivres avec un Certificat donnant les resultats de la caracterisation. Ces resultats sont obtenus par l'une des trois procedures de certification,

c'est-a-dire de mesure de la propriete, suivantes: (l) par une methode de reference precedemment reconnue, (2) par deux ou plusieurs methodes de mesures

differentes et fiables, ou (3) par un reseau ad hoc de

laboratoires participants, ayant la competence technique et la connaissance du materiau a caracteriser. Ces

procedures sont decrites en detail dans "The Role of

Standard Reference Material Measurement Systems"

NBS Special Publication 148 (1975). Les SRM's sont

definis comme des materiaux caracterises avec soin et certifies, produits en quantite, afin d'ameliorer la science des mesures. lis sont elbores et utilizes pour

repondre a trois objectifs principaux: Aider a developper des methodes d'analyses de justesse (methodes

de reference); Etalonner des appareillages de mesures

pour: (a) faciliter les echanges de produits, (b) insti- tuer les controles de qualite, (c) evaluer des perfor- mances, ou (d) mesurer une propriete donnee au mieux des connaissances actuelles; Assurer a long terme la validite et 1'integrite des processus de

controle de qualite. Sous tous ces aspects, les SRM's

permettent d'assurer la coherence et la justesse des mesures, dans de nombreuses facettes de la vie natio- nale - depuis la science et la technologie jusqu'aux

echanges commerciaux.

Research Materials. Contrairement aux SRM's, ils ne

sont pas certifies. Au lieu d'un Certificat, ces RM's

sont delivres avec un "Rapport d'Essais", sous la seule autorite de l'experimentateur du NBS auteur du

7
rapport. Un RM est essentiellement destine a permettre la poursuite de recherches scientifiques ou techniques sur ce materiau. Pour un RM, le souci majeur est de fournir un materiau homogene, afin que les cher- cheurs de differents laboratoires soient assures de

travailler sur le meme materiau.

Special Reference Materials. lis different a la fois des

SRM's et des RM's par le fait que NBS ne participe pas a leur caracterisation. Les GM's sont des materiaux de reference produits et certifies ou garantis par

d'autres agences gouvernementales, des organismes de

normalisation ou d'autres organisations a but non

lucratif. S"il apparait qu'ils correspondent a un interet general et s'il n'existe pas d'autres circuits nationaux

de distribution, le NBS fait office de distributeur pour

ces materiaux. Ce service est ouvert a toute organisation qui qualifie, et qui dispose de materiaux de

reference pouvant permettre de resoudre un probleme

de mesure au niveau national.

Catalogue des SRM's

La publication d'un nouveau catalogue des Stan- dard Reference Materials du NBS intervient environ

tous les trois ans. II repertorie les nouveaux materiaux

disponibles, les materiaux en preparation, et sup- prime les materiaux epuises. Entre les publications, la mise a jour du catalogue est assuree par des supplements annuels, qui repertorient: les prix en vigueur,

les nouveaux materiaux, les materiaux epuises (et proposent des materiaux de remplacement), et les revisions apportees aux Certificats. Les materiaux repertories dans ce catalogue sont

separes en plusieurs grandes classifications: References de composition chimique (Chemical Composition Standards), References de propriete physiques

(Physical Property Standards), References a caractere technologique (Engineering Type Standards),

"Research Materials", et "Special Reference Materials". Les trois premieres classifications correspondent aux seuls SRM's, et sont subdivisees en diverses

categories indiquees a la table de matieres. Les valeurs numeriques donnees dans le catalogue

pour decrire les proprietes des materiaux ne sont que

de valeurs nominales, a utiliser a titre indicatif pour

choisir les materiaux. Elles ne doivent pas etre utili- sees en lieu et place du Certificate delivre avec le materiau.

Nota: Certains SRM's sont delivres sans Certificat. Ces exceptions sont precisees a la fois dans la description du SRM et a l'index numerique correspondant.

L'index numerique donne les numeros de SRM,

RM et GM de tous les materiaux repertories dans le catalogue, ainsi que, soit la date du dernier Certificat,

soit une Nota expliquant l'absence de certificat. II existe egalement un index alphabetique. Cet index

repertorie principalement les categories de SRM et l'element ou la matrice de base, plutot que sa denomination precise. Les RM's et les GM's sont regroupes

uniquement en grandes rubriques.

Preparation et Disponibilite

des Standard Reference Materials

La preparation de nouveaux SRM's et le renouvellement d'anciens sont effectues continuellement. Au

terme de ces operations, les utilisateurs potentiels sont

avertis de leur disponibilite, et le SRM est decrit dans

le supplement au catalogue suivant.

L'objectif, pour les SRM's de renouvellement, est d'assurer une releve avant que le stock du SRM

existant ne soit epuise. Frequemment, cette condition

ne peut etre remplie, et, pour un temps, le SRM se trouve en rupture de stock. Quand cela se produit, les demandeurs en sont informes. Eventuellement, ils sont aussi informes de l'existance d'un materiau de

remplacement. (voir ci-apres "Commandes"). Des que

le lot de renouvellement est disponible, les clients ayant demande soit le lot anterieur, soit le nouveau,

sont rapidement avertis.

Les SRM's de renouvellement ne sont ordinairement pas identiques aux precedents, mais presentent une grande similitude, en particulier quant aux caracteristiques certifiees. En regie generale, le lot de

renouvellement peut etre utilize a la place du precedent. Par exemple, quant le premier acier Bessemer a

0,1 % de carbone a ete prepare en 1909, il a ete designe sous le nom de "Standard Sample No. 8". Les annees

suivantes, on a prepare un certain nombre de lots de

renouvellement, 8a, 8b, etc. . . L'actuel SRM 8j, Bessemer Steel (simule) a 0,1 % de carbone, represente le dixieme lot de renouvellement de ce materiau.

Alors que ces lots different quelque peu dans l'analyse

detaillee des teneurs, par contre, ils contiennent tous

des teneurs relativement elevees en phosphore, soufre

et azote, et un faible taux de metaux allies caracteristi- que de ce type de materiau.

Une fois le stock epuise, il devient impossible de

fournir les numeros anterieurs a une serie de renouvellement. Si la demande pour un materiau est moindre, ou bien si une source equivalente divient disponible,

sa production peut etre definitivement interrompue.

8
Commandes

Les commandes doivent etre adressees a:

Office of Standard Reference Materials

Room B311, Chemistry Building

National Bureau of Standards

Washington, D.C. 20234

Telephone: (301) 921-2045

Les commandes doivent mentionner la quantite

(nombre d'unites), la reference figurant au catalogue

et le nom du materiau demande. Par exemple:

1 each, No. 1 lh, Basic-Open-Hearth Steel,

0,2 % C.

Les materiaux decrits dans le catalogue sont distri- bues seulement dans la quantite unitaire precisee ou

des multiples de celle-ci. L'acceptation d'une commande n'implique pas

l'acceptation de quelque condition qui serait contraire aux principes, pratiques ou reglementations du National Bureau of Standards ou du Gouvernement des

Etats-Unis. Les commandes recues pour des materiaux "en

rupture de stock" sont annulees quant elles ne portent

que sur des articles epuises. Pour les autres commandes l'expedition des materiaux disponibles est effectuee, et les commandes d'articles epuises sont

annulees. Les rappels de commande ne sont pas

acceptes pour les materiaux de rupture de stock. Si un

lot de renouvellement du materiau est disponible, il sera automatiquement fourni. Les prix mentionnes sont en dollars U.S. et sont

publies dans le tarif joint a ce catalogue. Quand de nouveaux tarifs sont appliques, ils sont envoyes aux

utilisateurs qui ont effectue des achats dans les douze

mois precedents, et aux personnes ou organisations

qui en font la demande. Ces prix sont sujets a revision sans avis prealable, et les commandes sont facturees aux prix en vigueur a la date d'expedition. II n'est consenti aucune remise sur l'achat de SRM's, RM's, ou GM's.

II n'est pas necessaire de joindre a une commande

ferme le montant du reglement correspondant a

l'achat. Les factures doivent etre reglees dans un delai de 30 jours a compter du recu de la facture. Le

paiement des commandes en provenance de l'etranger

doit etre effectue en dollars U.S., selon l'une des

modalites suivantes:

a) Coupons UNESCO

b) Tirage d'un effet sur une banque des Etats-Unis.

c) Transfert bancaire a une banque des Etats- Unis.

d) Lettre de credit sur une banque des Etats-Unis

(voir ci-apres).

e) Mandat international.

La fourniture de factures pro-forma demande un

delai de 6 a 8 semaines; ce service n'est assure que sur demande.

Nota: Les lettres de credit peuvent etre utilisees pour payer a l'avance des SRM's. Elles seront acceptees seulement en provenance d'une banque des Etats- Unis. Ci-dessous sont enumeres les seuls documents

qui pourront etre fournis:

1) Six factures commerciales.

2) Liste des colis

3) Certificat d'origine

4) Taxe de transport aeriene (document qui ne

peut etre fourni que si l'acheteur paye les frais de transport; s'il est expedie affranchi en paquet

poste aerien international, ce type de recu ne pourra etre fourni).

Expeditions: Regime interieur

L'expedition de materiaux (sauf pour certains

types de materiaux reglementes) a destination des

Etats-Unis et du Canada est effectuee au taux d'af- franchissement normal (a condition que le paquet ne depasse pas le poids limite autorise par les lois et reglements postaux). Cependant, si l'acheteur de- mande un autre mode d'expedition, elle sera effectuee au compte de l'acheteur. Pour les produits expedies

ainsi, le NBS ne peut payer les taxes de port et les ajouter ensuite a la facture. Les types de materiaux

reglementes, tels que hydrocarbures, composes

organo-soufres, gaz comprimes, caoutchoucs, materiaux a base caoutchouc, sources radioactives etalons,

et autres materiaux similaires, sont expedies franco a bord (FOB) de Gaithersburg, Md.

Expeditions: Regime international

Les reglementations de nombreux pays pour l'im- portation de SRM's, RM's et GM's comportent de

grandes differences; toute tentative d'enumerer toutes

les possibilites s'avererait impossible. Aussi, quand les modes d'expedition dont nous donnons un apercu ci- dessous ne sont pas applicables, les acheteurs sont informes du mode d'expedition adequat vers leur pays.La plupart des commandes sont expedites affranchies en paquet poste aerien international, exceptions

faites des types de materiaux reglementes et des envois

excedant le poids limite postal autorize. Les envois se

9
rapportant a ces exceptions seront expedies FOB

Gaithersburg, Md, amoins qu'il ne soit necessaire

d'avoir recours a un agent etabli aux Etats-Unis

(firme de courtage, d'import-export). Dans ce dernier

cas, l'acheteur en est averti et devra designer un agent

de son choix. Le materiau sera alors conditionne pour

etre expedie outre-mer et sera envoye a l'agent FOB

Gaithersburg, Md.

Nota: Les commandes ou demandes de renseignements ecrites en anglais seront plus vite traitees que

celles necessitant une traduction.

National Bureau of Standards

Katalog fur Bezugs-Standards verschiedener Materialien, Ausgabe 1979

In diesem Katalog sind alle vom National Bureau of Standards sofort oder in nachster Zeit lieferbaren Bezugs-Standard Materialien (Standard Reference Materials, SRM's), Versuchs-Materialien (Research

Materials, RM's) und Spezial-Materialien (Special Reference Materials, GM's) aufgefuhrt. Sie werden im

einzelnen hinsichtlich ihrer garantierten Eigenschaften, der Menge pro Einheit und des Typs beschrieben. Ausserdem werden Hinweise fur die Aufgabe von Bestellungen gegeben. Die Preise sind in getrennt zu diesem Katalog erscheinenden Erganzungslisten enthalten, die jahrlich neu herausgegeben werden.

Stichworte: Analysis (Analyse) — Certification (Attest) —Characterization (Kennzeihnung) —

Composition (Zusammensetzung) — Research Materials (Versuch-Materials) — Special Reference Materials

(Spezial-Materials) —Standards Reference Materials (Standards Bezugs Materials)

Einleitung

Das Bezugs-Standards-Programm des National

Bureau of Standards umfasst iiber 1000 verschiedene

Materialien. In der Hauptsache sind es StandardMaterialien (SRM's) deren chemische Zusammensetzung, sowie chemische oder physikalische Eigenschaften bescheinigt werden. Aber auch

Versuch-Materialien (RM's) und SpezialMaterialien (GM's) gehdren dazu. Alle SRM's,

RM's und GM's tragen kennzeichenende Namen und

Nummern, mit denen sie jederzeit identifizierbar sind. Somit ist jedes mit einer bestimmten Bezeichnung

versehenes SRM, RM oder GM in den geforderten

oder vorgesehenen Grenzen mit jeder anderen Probe

gleicher Bezeichnung identisch, ausgenommen indivi- dual garantiere Materialien, die zudem durch eine

Seriennummer unterschieden werden.

Die ersten vom National Bureau of Standard

gelieferten Materialien hiessen Standard-Proben und

bestanden aus einer Gruppe von Erzen, Eisenwerkstoffen und Stahlen, deren chemische Zusammensetzung bescheinigt wurde. Seit Mitte der 60er Jahre

werden diese Materialien als Bezugs-StandardProben geliefert und umfassen ein breites Spektrum

chemischer und physikalischer Eigenschaften sowie

einen ebenso weiten Bereich von Messwerten.

Definitionen

Die Bezeichnungen "SRM", "RM" oder "GM"

kennzeichnen die Unterschiede beziiglich der mit den

einzelnen Proben verbundenen Art der Information

und Anwendungsmoglichkeiten.

Standard- Materialien (SRM) werden vom National

Bureau of Standards durch bestimmte chemische oder

physikalische Eigenschaften gekennzeichnet und mit

einem Zertifikat geliefert, in dem die kennzeichnenden Daten aufgefuhrt sind. Diese Daten werden

iiber einen von drei fur die Kennzeichnung festgelegten Wegen ermittelt, und zwar durch Messung der

Eigenschaften mittels:

1. eines zuvor bestatigten Referenz-Verfahrens;

2. zweier oder mehrerer voneinander unabhangiger Messmethoden;

3. einer ad hoc Gruppe kooperierender Laboratories die technisch dazu in der Lage sind und

griindliche Kenntnisse iiber das zu unterzu- chende Material besitzen.

Diese Wege werden im einzelnen in "The Role of

Standard Reference Materials in Measurement Sys10
terns" NBS Special Publication 148 (1975) beschrieben. Standard-Materialien (SRM's) werden als genau gekennzeichnete und garantierte Materialien

definiert, die zur Verbesserung der Messtechnik in entsprechenden Mengen hergestellt werden. Drei

Hauptzwecke sind es, ftir die sie hergestellt und

eingesetzt werden: —Die Entwicklung genauer Analysenmethoden

(Referenz-Methoden) zu unterstutzen. —Zur Eichung von Mess-systemen, die dazu dienen

a) den Warenaustausch zu erleichtern,

b) die Grundlage fur eine Qualitatskontrolle zu

bilden,

c) Leistungsfahigkeit, Wirkingsweise oder Gebrauchswert festzulegen, oder

d) bestimmte Eigenschaften an der Grenze des

Entwicklungsstandes zu messen. —Zur langfristigen Sicherung der Angemessenheit

und Integritat von Qualitats-Priifverfahren.

Damit tragen die SRM's dazu bei, die Vergleichbarkeit und Genauigheit von Messungen unter den ver- schiedensten Aspekten des taglichen Lebens—von der

Wissenschaft und Technologie bis zu Handel und

Wirtschaft—sicherzustellen.

Versuch- Materialien (RM). Anders als bei den SRM's

werden hierfiir keine Zertifikate erstellt. An deren

Stelle tritt ein "Report of Investigation" (Untersuchungsbericht), der unter der ausschliesslichen Verantwortung des ihn erstellenden Mitgliedes des National Bureau of Standards steht. Ein RM soil in erster Linie der Unterstutzung der wissenschaftlichen

oder technischen Forschung fur dieses Material

dienen. Hauptgrund fur die Ausgabe eines RM ist die Lieferung eines homogenen Materials, das den

Forschern in den verschiedenen Laboratorien die

Gewahr dafiir geben soil, dass sie auch dasselbe Material untersuchen.

Spezial- Materialien (GM). Diese unterscheiden sich von den SRM's und RM's dadurch dass das National

Bureau of Standards bei der Festlegung der Kennzeichen fur dieses Material nicht mitwirkt. GM's sind

Bezungs-Materialien, die von anderen Regierungsstellen, Normen-Ausschussen oder anderen gemeinniitzigen Organisationen hergestellt, beglaubigt oder

garantiert werden. Wenn ein offentliches Interesse an

diesen Materialien besteht oder wenn keine entsprechenden Wege der Verteilung im Lande gegeben sind,

iibernimmt das National Bureau of Standards deren

Vertrieb. Dieser Service ist alien Organisation zuganglich, die entsprechend qualifiziert sind und im

Besitz von Referenz-Materialien sind, die dazu bei- tragen konnten, ein nationales Messproblem zu

losen.

SRM-Katalog

Das National Bureau of Standards veroffentlicht

etwa alle drei Jahre neue Kataloge mit den von ihm

erhaltlichen Standard-Bezugs-Materialien, in denen

neue zur Verfiigung stehende Materialien sowie

solche, die sich in Vorbereitung befinden, aufgefuhrt

sind und auch Angaben iiber nicht weiter lieferbare Proben enthalten sind. Um aber auch in der Zwischenzeit den Katalog auf dem laufenden zu halten,

werden alljahrlich Erganzungen herausgegeben. Sie

enthalten die jeweils gultigen Preise, neue Materialien, ausgelaufene Materialien (ggf. mit Ersatzvorschlagen) und revidierte Zertifikate. Die in diesem Katalog aufgefuhrten Materialien

sind in verschieden Hauptgruppen unterteilt: Chemical Composition Standards (Standards ftir die chemische Zusammensetzung), Physical Property Standards (Standards fur physikalische Eigenschaften),

Engineering Type Standards (Technische Standards),

Research Materials (Versuchs-Materialien) und Special Reference Materials (Spezial-Materialien). Die

ersten drei Gruppen umfassen ausschliesslich SRM's

und sind in die im Inhaltsverzeichnis aufgefuhrten

Kategorien unterteilt. Die zur Beschreibung der Material-Eigenschaften

im Katalog angegebenen Zahlenwerte sind lediglich

Richtwerte und dienen nur als Hinweis bei der Auswahl der Materialien. Sie diirfen nicht anstelle des ftir das Material ausgegebenen Zertifikats verwendet

werden.

Anmerkung: Einige SRM's werden ohne Zertifikat

geliefert. Diese Ausnahmen sind sowohl in der SRMBeschreibung als auch im Zahlen-Index entsprechend

gekennzeichnet.

Der Zahlenindex enthalt die SRM-, RM- und GMNummern aller im Katalog aufgefuhrten Materialien sowie das Datum des zur Zeit gultigen Zertifi- kats beziehungsweise eine Begriindung, weshalb ein solches nicht vorhanden ist. Daneben gibt es einen alphabetischen Index. Zum

grossten Teil enthalt dieser Index die SRM-Gruppen

und den Hauptbestandteil oder das Hauptelement des

SRM oder zumindest den Namen spezifischer SRM's.

RM's und GM's sind lediglich als Gruppen aufgefuhrt.

11
Auftragserteilung

Auftrage sind zu richten an

Office of Standard Reference Materials

Room B311, Chemistry Building

National Bureau of Standards

Washington, D.C. 20234

Telephon (301) 921-2045

Die Auftrage miissen enthalten: die gewiinschte

Menge (Anzahl der Proben), Katalog-Nummer und

Bezeichnung des gewiinschten Materials. Beispiel: Je

eine Nr. llh, basischer Siemens-Martin-Stahl, 0,2%

C. Die im Katalog beschriebenen Materialien werden

in den angegebenen Mengen oder entsprechenden

Vielfachen davon geliefert.

Die Annahme eines Auftrages ist nicht gleichbedeutend mit der Anerkennung irgendeiner zusatzlich

in dem Auftrag enthaltenen Vorschrift, die nicht der

Politik, der Praxis oder den Regeln des National

Bureau of Standards oder der U.S. Regierung entspricht.

Fur nicht mehr am Lager befindliche Materialien

eingehende Auftrage werden, wenn darin nur solche

Materialien enthalten sind, anulliert. Sind in den

Auftragen auch noch andere Materialien enthalten,

werden diese geliefert und nur die nicht am Lager

befindlichen gestrichen. Fur nicht am Lager befindliche Materialien werden auch keine Auftrage zuriickgestellt. Sobald die Neuauflage eines Materials

zur Verfiigung steht, wird automatisch dieses geliefert.

Hersteltung und Lieferbarkeit von StandardBezugs- Materialien

Neue oder erneuerte SRM's werden standig hergestellt. Sobald sie bereit stehen, werden interessierte Anwender direkt iiber die Lieferbarkeit unterrichtet,

und im folgenden Katalog-Nachtrag erfolgt die

Beschreibung des SRM's.

Die Uberlegung beziiglich der Neuauflage von SRM's geht davon aus, deren Herstellung bereits in Angriff zu nehmen, bevor die Liefermdglichkeit des

bestehenden SRM's erschdpft ist. Manchmal ist dies nicht moglich, und so kann ein SRM vorubergehend vergriffen sein. Wenn dies der Fall ist, werden

Besteller dieses Materials dartiber informiert und,

soweit moglich, auf entsprechenden Ersatz hingewiesen. (Siehe auch unter "Auftragserteilung".) Sobald die Neuauflage zur Verfiigung steht, werden

alle Kunden, die einen Auftrag auf das fruhere oder

das neuaufgelegte Material erteilt hatten, sofort benachrichtigt.

Neuaufgelegte SRM's sind gewohnlich mit ihren

Vorgangern nicht identisch, doch sind sie hinsichtlich

der spezifizierten Eigenschaften genau so hervorragend. Grundsatzlich kann die Neuauflage anstelle

ihres Vorgangers Verwendung finden. Beispiel: Als

der erste 0,1 %ige Bessemer-Kohlestahl im Jahre 1909

hergestellt wurde, erhielt er die Bezeichnung

"Standard-Probe Nr. 8". Im Verlauf der folgenden

Jahre wurden mehrere Neuauflagen unter der Be- zeichnung 8a, 8b usw., hergestellt. Die zur Zeit geltende Nummer ftir diesen Bessemer-Stahl ist SRM 8j und stellt die zehnte Neuauflage dieses Materials dar. Obwohl jede dieser neuaufgelegten Serien in der

genauen Analyses von den anderen etwas abweicht,

weisen jedoch alle den relativ hohen Anteil an Phosphor, Schwefel und Stickstoff und einen geringen

Gehalt an Legierungsmetall auf, was ftir diese Art von

Material charakteristisch ist. Wenn das Lager geraumt ist, ist es nicht mehr

moglich, vorangegangene Nummern eines neuaufgelegten Materials zu liefern. Besteht nur ein geringer

Bedarf oder ist ftir ein bestimmtes Material eine

andere Lieferquelle vorhanden, kann die Produktion

durch das National Bureau of Standards ftir immer

eingestellt werden.

Die Priese sind in U. S. -Dollar festgelegt und in der

diesem Katalog beigefiigten SRM-Preisliste enthalten. Neue SRM-Preislisten werden nach Erschei- nen alien Kunden, die in den vorangegangenen 12 Monaten kaufe getatigt haben, sowie Personen

oder Organisationen, die danach verlangt haben, zugestellt. Die Preise sind unverbindlich und konnen

ohne diesbeziigliche Nachricht Anderungen unterliegen. Bei Auftragen werden stets die im Augenblick der Lieferung giiltigen Preise in Rechnung

gestellt. Auf SRM's, RM's und GM's werden keinerlei Abziige gewahrt.

Vorauszahlung bei Auftragserteilung ist nicht not- wendig. Fur die Begleichung einer Rechnung werden

30 Tage Ziel nach Erhalt gewahrt. Die Begleichung

auslandischer Auftrage muss in U.S.-Dollar erfolgen.

Dies kann in folgender Weise geschehen:

a) mit UNESCO-Kupons,

b) durch Scheck einer U. S. Bank,

c) durch Bank-zu-Bank-Uberweisung auf eine U. S. Bank,

d) durch Kreditbrief auf eine U. S. Bank (siehe unten)

oder

e) durch internationale Postanweisung.

Die Ausstellung von proforma-Rechnungen erfordert gewohnlich 6 bis 8 Wochen und wird deshalb nur auf

Wunsch vorgenommen.

12
Anmerkung: Fur die Vorauszahlung konnen Kreditbriefe verwendet werden. Sie werden nur von Banken in den Vereinigten Staaten angenommen.

Folgende Begleitdokumente werden den Sendungen beigefugt:

1. Sechs Waren-Rechnungen

2. Packzettel

3. Ursprungs-Zertifikat

4. Luftfracht-Rechnung (Sie wird nur ausgestellt, wenn das Material gegen Nachnahme versandt

wird. Erfolgt der Versand portofrei mit der inter- nationalen Luftpaketpost, konnen keine Empfangsbestatigungen gegeben werden.)

Inland-Versand

Nach den USA und Canada erfolgt der Versand

(einige beschrankte Gruppen ausgenommen) normalerweise portofrei, vorausgesetzt dass das Gewicht des

Pakets nicht die postalisch vorgeschriebenen Gewichtsgrenzen uberschreitet. Verlangt der Kaufer

jedoch eine andere Versandart, so erfolgt die Liefe- rung gegen Nachnahme. Bei Nachnahmesendungen

kann das National Bureau of Standards nicht die

Portokosten usw. auf der Rechnung vermerken. Bes- timmte Gruppen wie Kohlenwaseerstoffe, organische

Schwefelverbindungen, komprimierte Gase, Gummi,

Gummi-Zusatz-Materialien, radioaktive Standards

und ahnliche Materialien werden fob Gaithersburg,

Md. (USA) zum Versand gebracht.

Versand ins Ausland

Die Einfuhr-Vorschriften fur SRM's, RM's und

GM's sind fur die einzelnen Lander sehr unterschiedlich. Es ware zwecklos, alle moglichen Abweichungen

hier zusammenzustellen. Deshalb werden die Kaufer

uberall dort, wo die nachfolgenden Versandpraktiken

nicht anwendbar sind, uber die fur ihr Land beste Versandform informiert.

Die meisten Auftrage werden portofrei mit der

internationalen Luftpaketpost versandt. Ausgenom- men sind Proben der beschrankten Gruppen und

Sendungen, die das fur Fu&lpakete zulassige Gewicht

uberschreiten. In diesen Fallen erfolgt der Versand

fob Gaithersburg, Md. (USA), es sei denn, ein Vertreter (Transport-oder Makler-Firma) mit sitz in den

USA gewiinscht wird. Wenn dies der Fall ist, wird

der Kaufer entsprechend unterrichtet und aufgefordert, einen Vertreter seiner Wahl zu benennen. In diesem Falle wird das Material fur den UberseeVersand verpackt und dem Vertreter fob Gaithersburg, Md. (USA) zugestellt.

Anmerkung: Auftrage und Anfragen in englischer

Sprache werden schneller abgewickelt als solche, die

erst einer Ubersetzung bedtirfen.

13
CERTIFIED CHEMICAL COMPOSITION STANDARDS

Steels (Chip Form)

These SRM's were prepared for the steel industry primarily for use with methods involving sample solutions

in checking chemical methods of analysis for both production control and customer acceptance. These SRM's

consist of nominal composition steel alloys selected to provide a wide range of analytical values for various

elements of vital concern to the chemist. They are furnished in 150-gram units (unless otherwise noted) as chips

usually sized between 0.4 to 1.2 mm, prepared from selected portions of commercial ingots.

Plain Carbon Steels

Chemical Composition (Nominal Weight Percent)

SRM Type C Mn P Grav Comb Si

8j Bessemer (simulated). 0. 1C 0.081 0.505 0.095 0.077 0.058

llh BOH, 0.2C .200 .510 .010 .026 .21, I2h BOH, 0.4C .407 .842 .018 .027 .235 I3g BOH. 0.6C .61 .85 .006 .031 ,35 5

I4e BOH. 0.8C .753 .404 .008 .039 .177 15g BOH, 0.1C .094 .485 .005 .026 .095 16e BOH, 1.IC 1.09 .381 .028 .029 .20 2 I9g AOH, 0.2C 0.223 .554 .046 0.032 .033 .186 20g AISI 1045 .462 .665 .012 .028 .305

65e Basic Electric 0.3C IN PREP

152a BOH, 0.5C (Tin bearing) .486 .717 .012 .030 .202 178 Basic Oxygen 0.4C .395 .824 .012 .014 .163 335 BOH 0.1C (Carbon only) 300 g .092 336 Cr-V, 0.6C (Carbon only) 75 g (1-g pins) .567 337 BOH 1.1C (Carbon only) 300 g 1.07 368 AISI 1211 0.089 .82 .084 .132 .007

SRM Cu Ni Cr V Mo Co Ti Sn

Al

(total) N Other

8jllh

I2h !3g

0.020

.061 .073 .066

0.113

.028 .032

.061

0.047

.025 .074

.050

0.015

.001 .003

.001

0.038

.006

0.004

(0.038)

.04,

0.006

14e I5g

16e I9g 20g

.072 .036

.052

.093 .034

.053

.017 .072 .066

.034

.071 .028

.118 .374

.036

.002

.001 .002

.012 .002

.013

.013 .008

0.012 .027 0.008

.060

.031 .040 Nb 0.026

65e

152a

178

.023 .032

.056

.010

.046

.016

.001

.001

.036

.003

.032

335 336

337

368 .010 .008 .030 .001 .003 .010

14
Low Alloy Steels

Chemical Composition (Nominal Weight Percent)

SRM I ype

(Other

Forms)

Mn pr

< Grav

5 Comb v u IN 1

30f Cr-V (SAE 6150) — 0.49 0.79 0.010 0.010 0.28 0.76 0.071 32e Ni-Cr (SAE 3140) — .409 .798 .008 0.022 .021 .278 .127 1.19 33d Ni-Mo (SAE 4820) — .173 .537 .006 .010 Oil .253 .123 3.58 36b Cr2-Mol — .1 14 .404 .007 — .019 .258 .179 0.203 72g Cr-Mo (SAE X4130) IN PREP — — — —

100b Manganese (SAE T1340) — .397 1.89 .023 .029 .028 .210 .064 .030 105 High-Sulfur 0.2C

( 1 d rnnn rinh'l

. 1 7 J t .OU) 106b Cr-Mo-Al (Nitralloy G) — .326 0.506 .008 .016 .017 .274 .117 .217 125b High-Silicon 1 134 .028 .278 .029 — .008 2.89 .071 .038 129c High-Sulfur — .125 .769 .076 — .245 0.020 .013 .251 131c Low Carbon-Silicon (lOOg) — .0029 — — — .020 — — —

139b Cr-Ni-Mo (AIS1 8640) 1222 .403 .778 .013 — .019 .242 .097 .510

155 Cr0.5-W0.5 — .905 1.24 .015 .010 .01 1 .322 .083 .100 179 High-Silicon 1 135 .027 0.094 .006 — .026 3.19 .056 .050 291 Cr-Mo (ASTM A~>13) 1 77 .55 008 020 U.ZJ„ 047 fuss 293 Cr-Ni-Mo (AISI 8620) .222 .96 .018 .022 .30,, .032 .48,, 361 AISI 4340 661,1095,1261 .383 .66 .014 .017 .222 .042 2.00 362 AISI 94BI7 (Mod) 662,1096,1262 .160 1.04 .041 .038 .39 .50 0.59 363 Cr-V(Mod) 663,1097,1263 .62 1.50 .02, .009 .74 .10 .30 364 High Carbon (Mod) 664.1098,1264 .87 0.25, .01, .02, .06, .24, •14,

SRM Cr V Mo W Co Ti As Sn

Al

(total) Nb Ta Zr N

30f 32e 33d 36b

72g

100b

105 106b

125b

129c

1 39b

155 179

291 293

361 362

363

364

0.95

.678

.143 2.18

0.063

1.18 0.019

.014

.488

.485 .022

1.33 0.51„

.69, .30

1.31 0.06,

0.18

.002

.002 .004

.003

.003

.012 .004

.014 <01

.004

.01

.040

.31 .10,

0.023

.246 .996

.237

.199

.008 .002

.182

.039

.014

.53s .204 .19 .068

.028

.49

0.517

.017

.20 .046

.10

0.030

.30 .048

.15

0.020

.084

.050

.24

0.017

.09, .010

,05 2

(0.01 1)

.003

.004

.010

.016

.10, .008

1.07 0.329

.0028

.002

.039

.02, .09, .24 (.008)

0.022

.29 .049

.I57

0.020

.20 (.053)

.1 1

0.009

.19 .049

.068

0.009

(.011)

.004

.007

(.0037) (.00404)

(.0041)

(.0032)

SRM B Pb Sb Bi Ag Se Te Ce La Nd

361 362

363 364

0.0037 .0025

.0007, .0106

0.00002,

.0004, .0018,

.023n

0.0042

.013 .002 .034

(0.0004)

(.002) (.0008)

(.0009)

0.0004

.0011 .0037

(.00002)

(0.004)

(.0012) (.00016) (.00021)

(0.0006)

(.001 1) (.0009)

(.0002)

0.0040

.0019 .0030 0005 v

(0.001)

(.001)

(.002) (.0002)

0.0007,

.0007, .0012

.0001,

SRM Ca Mg Zn Pr Ge 0 H Au Hf

361 362

363

364

0.0001,, .0002, .0002, .000030.0002,, .0006, .0006, .00016

(0.0001)

(.0005) (.0004)

[.001]

(0.0003)

(.0003) (.0004)

(.0001)

[0.006] [002]

[010]

[ 003]

(0.0009)

(.00107)

(.00066)

(.0010)

K0.0005)

(<.0005) K.0005)

K.0005)

(<0.00005) K.00005)

.0005

.0001

(0.00021

(.0003)

(.0005)

(.0013)

15
High Alloy Steels

Chemical Composition (Nominal Weight Percent)

j> K Ivl Type {~* rvi n r Grav Comb

c

31 Cu

I26c High-Nickel (36% Ni) 0.026 0.47 0.004 0.006 0.19 0.040 344 Crl5-Ni7-Mo2-All .69 .57 .018 .019 .395 .106 345 CrI6-Ni4-Cu3 .048 .224 .018 0.012 .012 .610 3.44 348 Ni26-CrI5 (A286) .044 1.48 .015 .002 .54 0.22

SRM Ni Cr V Mo Co Ti Al

(Total) Nb Ta B Fe

126c 36.05 0.064 0.001 0.011 0.008 344 7.28 14.95 .040 2.40 0.076 1.16 0.002 345 4.24 16.04 .041 0.122 .089 0.231 348 25.8 14.54 .25 1.3 2.24 0.23 0.0031 53.3

Stainless Steels

Chemical Composition (Nominal Weight Percent)

SRM Type

(Other Forms) C Mn P Grav Comb Si Cu

73c Crl3 (SAE 420) 0.310 0.330 0.018 0.036 0.181 0.080

1 2 1 d Crl7-Nill-Ti0.3 (AISI 321) 1171 .067 1.80 .019 .013 .54 .121 123c Crl7-Nill-Nb0.6 (AISI 348) 1 172 .056 1.7, .024 .014 .59 .103 133a Crl3-Mo0.3-S0.3 .120 1.03 .026 0.326 .330 .412 .118 160b Crl9-Nil2-Mo3 1155 .044 1.64 .020 .018 .50, .172

166c Low Carbon (AISI 3162) Carbon Only .0078 339 Crl7-Ni9-Se0.2 (SAE 303Se) .052 0.738 .129 .013 .654 .199 367 Cr24-Ni0.3(AISI 446) 1267 .093 .315 .018 .016 .58

SRM Ni Cr V Mo Co Ti Nb Ta Pb Se N

73c 121d

123c 133a 160b

0.246

11.17 \\.\

0.241

12.26

12.82

17.4s 17.40 12.89

18.45

0.030

.026

.047

0.091

.165

.22 .294

2.38

0.10

.12

.10,

0.342

0.65 <0.001

0.001

0.037

.032

.039

166c 339 8.89 17.42 .058 0.248 .096 0.247 367 0.29 24.19 .08 .168

Tool Steels Chemical Composition (Nominal Weight Percent) SRM Type C Mn P

Grav Comb Si Cu

50c WI8-Cr4-Vl 0.719 0.342 0.022 0.010 0.009 0.311 0.079 132b Mo-W-Cr-V .865 •340 .01, .005 .18 .08, 134a Mo8-W2-Cr4-Vl .808 .218 .18 .007 .007 .323 .101 153a Co8-Mo9-W2-Cr4-V2 .902 .192 .023 .007 .007 .270 .094

SRM Ni Cr V Mo W Co Sn As N

50c 0.069 4.13 1.16 0.082 18.44 0.018 0.022 0.012 132b .23 4.38 1.84 4-9, 6.28 0.028 134a .088 3.67 1.25 8.35 2.00 153a .168 3.72 2.06 8.85 1.76 8.47 .024

16
Steels (Granular Form)

These granular-form SRM's are prepared by a pre-alloyed powder metallurgical process, which generally

includes argon atomization and hydrogen annealing. The materials normally are sized between 0.07 to 0.7 mm

to ensure satisfactory homogeneity and are issued in 100-gram units.

Chemical Composition (Nominal Weight Percent) SRM Type C Mn P s Si Cu Ni

163 Low Alloy, 1.0 Cr 0.933 0.897 0.007 0.027 0.488 0.087 0.081 lOlf Stainless, (AISI 304L) .014 .087 .008 .008 .876 .030 9.96

SRM Cr V Mo w Co N As Sb Ga

163 0.982 0.029 0.007

lOlf 18.49 0.034 .007 (0.0002) 0.088 (0.003) (0.0009) (0.004)

Steels (Solid Form)

Several groups of SRM's have been prepared to meet the basic needs of the steel industry for analytical

control primarily by optical emission and x-ray spectroscopic methods of analysis. Both nominal composition

and analytical range SRM's are provided for ingot iron, low-alloy steel, stainless steel, tool steel, and specialty

steel. These SRM's are furnished in various forms. The 400 series is intended for optical emission spectroscopic

methods of analysis utilizing the "point-to-point" technique. The 600 series is intended for microchemical

methods of analysis such as electron probe microanalysis, spark source mass spectrometric analysis, and laser probe analysis. The 800, 1 100, and 1200 series are intended for "point-to-plane" optical emission spectroscopic

methods of analysis. The D800 series, and the 1 100 and 1200 series also are intended for x-ray spectroscopic

methods of analysis. Because of the special homogeneity requirements, most of these materials have been prepared by using the most modern techniques of melting, casting, fabrication, and heat treatment to ensure adequate uniformity of

composition.

NOTE: Values in parentheses are not certified as they are based on the results from a single laboratory. Values

in brackets are not certified but are nominal values obtained from heat analyses. These values are given for additional information on the chemical composition.

Nominal Sizes for Solid Steel SRM's

400 Series: 5.5 mm (7/32 in) diameter, 102 mm (4 in) long

600 Series: 3.2 mm (1/8 in) diameter, 51 mm (2 in) long

800 Series: 13 mm (1/2 in) diameter, 51 mm (2 in) long

D800 Series: 31 mm (1 1/4 in) diameter, 6.4 mm (1/4 in) thick

1100 and 1200 Series: 31 mm (1 1/4 in) diameter, 19 mm (3/4 in) thick

17
Ingot Iron and Low-Alloy Steels The preparation of these original spectroscopic SRM's began in about 1944 when the cores remaining

after lathe cutting the materials for chip form standards were tested for homogeneity. Those found satisfactory were fabricated to the final shapes and sizes. To meet the urgent need in the mid-1950's for calibration standards

for x-ray spectroscopic methods of analysis, portions of the material from five of these SRM's were converted to the applicable disk form. Although entirely satisfactory for conventional spectroscopic methods of analysis, these SRM's generally do not meet the stringent requirements for homogeneity necessary for use with the newer

microchemical methods of analysis. These standards will be discontinued when the supply is exhausted.

Chemical Composition (Nominal Weight Percent) SRM Type Mn Si Cu Ni Cr V Mo Sn

Al

(Total) Other

803a D803a Acid Open Hearth, 0.6C 1.04 0.34 0.096 0.190 0.101 0.005 0.033 404a 804a Basic Electric 0.88 .44 .050 .040 .025 .002 .007 405a 805a Medium Manganese 1.90 .27 .032 .065 .037 .005 0.056 407a 807a D807a Chromium-Vanadium 0.76 .29 .132 .169 .92 .146 408a 808a Chromium-Nickel .76 .28 .10 1.20 .655 .002 .065

409b 809b Nickel .46 .27 .104 3.29 .072 .002 .009 0.012 Co 0.025 413 Acid Open Hearth. 0.4C .67 .22 .25 0.18 .055 .007 .006 414 Cr-Mo (SAE 4140) .67 .26 .11 .080 .99 .003 .32 .014 .020 417a 817a Basic Open Hearth, 0.4C .78 .13 .062 .050 .013 .036

418a Cr-Mo (SAE X4130) .52 .27 .040 .125 1.02 .21 420a 820a D820a Ingot Iron .017 .027 .0092 0.0032 .0013 .0017 .003 Co .006 821 Cr-W, 0.9C 1.24 .080 .10 .49 .012 .040 W .52 427 827 Cr-Mo (SAE 4150) (B only) B .0027

Special Ingot Irons and Low-Alloy Steels

The planning of the 1 100 series SRM's began in late 1952 to meet critical requirements of calibration in the iron and steel industry. Steel for these SRM's was prepared by the most modern melting, casting, and

fabrication techniques to provide large quantities of material of the highest possible homogeneity. The materials were fully characterized and included investigations by means of electron probe microanalysis and quantitative

metallographic techniques. It was concluded that, for example, SRM's 461 and 463 are sufficiently homogeneous that any present microanalytical technique can be carried out with little chance of inaccuracy caused by

inhomogeneity. Details of the metallographic and homogeneity characterization are given in NBS Miscellane- ous Publication 260-3 and 260-10, respectively (see inside back cover for ordering instructions).

The 1200 series replaces the 1 100 series which has been exhausted and consists of four low alloy steels and

an electrolytic iron containing a graded series of 40 elements. Material from the same melts are available in three other forms: chip form, 361-365, for chemical methods of analysis, (page 15); rods, 661-665, 3.2 mm (1/8

in) in diameter and 51 mm (2 in) long for microchemical methods of analysis such as electron probe

microanalysis, spark source mass spectrometric analysis, and laser probe analysis (see below); and rods (1095-

1099), 6.4 mm (1/4 in) in diameter and 102 mm (4 in) long for determining gases in metals by vacuum fusion and

neutron activation methods of analysis (page 35). The preparation of the 1200 series involved a cooperative

effort between Industry and NBS, and represents the first application of the "benchmark" concept to SRM's.

With thousands of industrial processes requiring analytical control, demands for SRM's far exceeded the NBS

production capacity. An ever widening gap between supplies and demands led to a program to produce

essential "benchmark" SRM's to serve as calibration points in measurement systems. While other selected low-alloy steel SRM's will be prepared to augment the 1200 series, this series is expected to be the primary

"benchmarks," especially for some 25 trace elements that affect the physical properties of steels.
NOTE: Values in parentheses not certified, based on a single analytical method.

Values in brackets not certified, approximate values from the heat analyses.

tFrom Gasometric Certificates: SRM's 1095 through 1099. —Not detected, value given is conservative "Upper Limit" of detection by a specific method of analysis.

Set: 668 Set of 5: 661, 662, 663, 664, and 665

Chemical Composition (Nominal Weight Percent)

SRM Type

^uxncr

rui 1 1 1 s> ^ C Mn P S Si Cu Ni Cr

1134 High-Silicon 125b 0.026 0.277 0.028 0.009 2.89 0.070 0.038 0.019 1135 H i oh—^i 1 1 rr»n 1 70 1

' _ / nod .wo T, 1Q 07"? 1136 Hloti—^iilftir 1 L7\* 1

.11, '-) 5 .uoo U.U 1 o 014

461 T r\vu Allnv A 1

.36 .053 (.uz; .047 .34 1 73 .13 462 Low Alloy B .40 .94 .045 (.02) .28 .20 0.70 .74 463 . 1

I Q7 i . i j rn i (.UZJ Al 1Q .J7 .ZD 464 Low Alloy D .54 1.32 .017 (.02) .48 .094 I3 5 .078 465 Ingot Iron E .037 0.032 .008 (.01) .029 .019 .026 .004 466 1166 Ingot Iron F .065 .11 3 .012 (.01) .025 .033 .051 .011 467 Low Alloy G .11 •27 5 .033 (.01) .26 .067 .088 .036 468 Low Alloy H .26 .47 .023 (.02) .075 .26 1.03 .54 1169a Lead-Bearing (.1) (1.0) (.07) (.3) (.01) (.1) (0.05) (.04) 1222 Cr-Ni-Mo (AISI 8640) 139b .43 0.78 .013 .022 .24 .097 .51 .48

*661 1261 AISI 4340 361,1095 .38, 0.66 .015 .017 .223 .042 1.99 .69 *662 1262 AISI 94B17 (Mod) 362,1096 • 160 1.04 .042 .038 .39 .50 0.59 .30 *663 1263 Cr-V (Mod) 363,1097 .62 1.50 .02, .008 .74 098 .32 1.31 *664 1264 High Carbon (Mod) 364,1098 •870 0.255 01 8 .028 .067 .24, .142 0.065 *665 1265 Electrolytic Iron 365,1099 .0067 .0057 .002 5 .0059 .008fl .0058 .041 .007 2

SRM B Pb Ag Ge O N H

461 0.000, (0.003) (O.OOI5) (0.001 5 ) (0.020 ) (0.006) 462 .0005 .006 (<.0002) (.0030) (.006) (.008) 463 .0012 .012 (<.0002) (•0025) (.007) (-006) 464 .005 .020 (.003,) (OOI5) (.006) (.007 ) 465 .000, (<.0005) (.00025 ) (.0035 ) (.003) (.005) 466 1166 (.0002) (.001 3) (.00045 ) (.0030) (.005) ( 006 ) 467 (.0002 ) .0006 (.0040 ) (•0030) (.004) (.004) 468 .009 K.0005) K.0005) (.OOlo) (.004) (•006 ) 1169a .29 1222 (.007)

*661 1261 .0005 .000025 .0004 [.006] (.0009)t (.0037)t [<0.0005]t *662 1262 .0025 .00043 (.0010) [.002] (-OOll)t (.0041)t [<.0005]t *663 1263 .0009, .0022 (.0038) [.010] (007)t (.0041)1 [<.0005]+ *664 1264 .011 .024 (.00002) [.003] [.0017]t [ 003]t [<.00051t *665 1265 .00013 .00001 5 (-.000002) (-.0014) (~.0063)f (~.0011)+ (-.0001)+

*SRM"s 661, 662, 663, 664, and 665 are sold in a set only as SRM 668.

19
SRM V Mo W Co Ti As Sn AA 1

I (Total) Nb Ta Zr

1 134 0.008 0.003 0.329 — —

1135 <0.01 .014 .004 .0028

1 136 .012 .002 — — — — — —

461 .024 .30 0.01

0.26 (0.01) 0.028 .022 .005 0.01

0.002 K0.005)

462 .058 .080 .053 .1

.037 .046 .066 .02, .096 .036 .063 463 .10 . 1

.105 .01, .010 .10 .013 .02, .I9 5 .15 .20 464 •295 .029 .022 02,, .004 .018 .043 .005 .037 .069 .010 465 .002 .005 (.001) .008 .20 .010 .001 .19 (.001) .001 (.002) 466 1 166 .007 .01

(.006) 046 .057 .014 .005 .01, .005 .002 K.005)

467 .041 .021 .20 .07, .26 .14 .10 .16 .29 .23 .094 468 .17 .20 .077 .16 .01

.008 .009 .04; .006 .005 K.005)

1 169a (.001) (-02) 1222 .005 .18 — (.016) (.002) — — (.038) (.002) — —

*66l 1261 .01.19 .017 .030 .020 .017 .010 .02, .022 .020 .009

1 ZOZ .04, •068 .20 .30 .084 .09 : .016 .09; .29 .20 .19 *663 1263 .31 .030 .046 .048 .050 .010 .104 .24 .049 (.053) .049 *664 1264 .10, .49 .10. .15 .24 05, .008 (.008) • I

1 Ds

i

1 1

. t 1 OAS *665 1265 1)006 .0050 (-.00004) .007,, .0006 (.0002) (-.0002) (.0007) K.0000I) I-K.00005) -K.0000I)

SRM Sb Bi Ca Mg Se Te

1222

*661 1261 0.0042 0.0004 0.00002s 0.00018 0.004 0.0006 *662 1262 .01 2o (.002) .00014 .00062 (.0012) .0011 *663 1263 .002 (.0008) .00013 .00049 (.00016) .0009 *664 1264 .034 (.0009) .00004 .00015 (.00021) .00018 *665 1265 -(<.00005) -K.OOOOl) -(<.00001) -K.00002) -K.00001) -K.0000I)

SRM Zn Au Ce Hf La Nd Pr Fe

*661 1261 (0.0001) (<0.00005) 0.0014 (0.0002) 0.0004 0.0002, (0.00014) (95.6) *662 1262 (.0005) K.00005) .0015 (.0003) .0004 ,00064 (.00012) (95.3) *663 1263 (.0004) .0005 .0014 (.0005) .0006 .0006,, (.00018) (94.4) *664 1264 [.001] .0001 .0002, (.0013) .00007 .00007 (.00003) (96.7) *665 1265 !< 0001) -«.000002) -K.000005) -(< .00002) -(< .000005) -«.000005) -(<. 000005) (99.9) *SRM's 661, 662, 663, 664, and 665 are sold in a set only as SRM 668.

Stainless Steels

Three groups of stainless steel SRM's designed primarily for calibration in spectroscopic methods of analysis are available. Groups I and II have been extensively tested for homogeneity and found satisfactory for application in conventional spectroscopic methods of analysis. Neither group, however, has been tested for microanalytical

methods and their use in these applications is not recommended.

Group III are for the "point-to-plane" technique of emission spectroscopy and for x-ray spectroscopy.

They were prepared by melting, casting, and fabrication techniques known to produce material of high

homogeneity.

(Values in parentheses are not certified, but are given for additional information only.)

Chemical Composition (Nominal Weight Percent) GROUP I SRM Name Mn Si Cu Ni Cr V Mo w Co

442 Crl6-Nil0 2.88 (0.09) 0.11 9.9 16.1 0.032 0.12 (0.08) 0.13 443 Crl8.5-Ni9.5 3.38 (.15) .14 9.4 18.5 .064 .12 (.09) .12 444 Cr20.5-Nil0 4.62 (.65) .24 10.1 20.5 .12 .23 (.17) .22

SRM Ti Sn Nb Ta B Pb Zr Zn

442 0.002 0.0035 o 032 (0.0006) 0.0005 0.0017 (0.004) (0.003) 443 .003 .006 .056 (.0008) .0012 .0025 (.005) 444 .019 .014 .20 (.004) .0033 .0037 (.011) (.004)

20
Chemical Composition (Nominal Weight Percent) SRM Name Mn Si Cu Ni Cr V

445 446

447

448 — —

Crl3-Mo0.9 (Mod. AISI 410). Crl8-Ni9 (Mod. AISI 321) . Cr24-NiI3 (Mod. AISI 309) . . Cr9-Mo0.3 (Mod. AISI 403).

0.77

.53 .23 2.13

0.52

1.19 0.37

1.25

0.065

.19

.19 .16

0.28

9.1 1 13.26 0.52

13.31 18.35 23.72

9.09

(0.05)

(.03)

(.03) (02) 449

450

849

850 D849

D850

Cr5.5-Ni6.5 Cr3-Ni25

1.63 0.68

.12

.21 .36

6.62

24.8

5.48

2.99

(.01) (.006)

SRM Mo W Ti Sn Nb Ta

445 446

447

448

0.92

.43 .059

.33

(0.42)

(.04) (.06)

(.14)

(0.03)

(.34)

(.02)

(.23)

(0.02)

(.05)

0.11

.60

.03

.49

(0.002)

(.030)

(.002)

(.026) 449 450

849

850 D849

D850

.15 (19)

(.21) (11)

(.05)

(.07) (.09)

.31 .05

(.021)

(.002)

GROUP III Chemical Composition (Nominal Weight Percent)

SRM Type

(Other Forms) C Mn P S Si Cu Ni Cr

1151a Cr22-Ni7—IN PREP

CI 151 Cr22-Ni7—IN PREP

1152 Crl8-Nil0 0.163 1.19 0.017 0.017 0.654 0.497 10.21 18.49 1152a Crl8-Nil0—IN PREP

C1 152 Crl8-Nil0—IN PREP

1153a Crl6-Ni8—IN PREP

CI 153 Crl6-Ni8—IN PREP

1154a Crl9-Nil2—IN PREP

CI 154 Crl9-NiI2—IN PREP

1155 Crl8-Nil2-Mo2 (AISI 316) 1 60b .046 1.63 .020 .018 .50 .169 12.18 18.45 1170a Selenium-Bearing (.052) (0.738) (.129) (.013) (.654) (.199) (8.89) (17.42) 1171 Crl7-Nil 1-Ti0.3 121d .067 1.8„ .018 .01, .54 .121 11.2 17.4 1172 Crl7-Nill-Nb0.6 123c .056 1.7, .025 •0I 4 .59 .10, 11.3, 17.4b 1185 Crl7-NiI3-Mo2 (AISI 316) .11 1.22 .019 .016 .40 .067 13.18 17.09 1267 AISI 446 367 .093 0.3 15 .018 .015 .58 0.29 24.24

SRM V Mo Co Ti As Sn Al Nb Ta B Pb Zr

1151a C1 151 1152 0.044 0.366 (0.095) (0.12) (0.01) (0.004) (0.003) (0.20) (0.085) (0.005) (0.001) (0.03) 1152a C1 152 1153a CI 153 1154a C1 154

1155 .047 2.38 .101 .001 1170a (.058) (0.248) (.096) Se 0.25

1171 .16, .10 .34 1172 .22 .12 .65 <.001

1185 2.01 <.001 <.001 <.001

1267 .08 N 0.17

21
Specialty Steels SRM's 1156, Maraging Steel, and 1158, High-Nickel Steel (Invar), are designed primarily for use in optical emission and x-ray spectrometric methods of analysis.

SRM 1156 derives its name from the formation of martensite on age hardening. Alloys of this type

are used extensively in submarines, missiles, and aircraft. SRM 1 158 has good impact toughness down to -269° C and has an extremely low coefficient of expansion between -253 and 203° C. These properties make this material very useful for cryogenic application.

SRM 1 158 also serves as a "benchmark" for the production control of ferronickel (40Ni-60Fe) alloys.

Chemical Composition (Nominal Weight Percent) SRM Type C Mn P S Si Cu

1156 0.023 0.21 0.011 0.012 0.184 0.025 1158 High-Nickel (Ni 36) .026 .47 .004 .006 .19 .040

SRM Ni Cr Mo Co Ti Al Zr B Ca v

1156 19.0 0.20 3.1 7.3 0.21 0.047 0.004 0.003 <0.001

1158 36.0, .064 0.01! 0.008 0.001

High-Temperature Alloys (Solid Form)

High-temperature alloy SRM's were prepared to meet the critical needs of industry, particularly the aerospace industry, and government agencies. These SRM's are useful in instrument calibration, primarily

for x-ray and optical emission spectroscopic methods of analysis.

Chemical Composition (Nominal Weight Percent) SRM Type C Mn P S Si Cu

1198 Incoloy 901 (.048) (.49) (.006) (.002) (.38) (0.012) 1199 L 605 (.14) 1.42 (.005) .83 1200 S 816 (.40) 1.34 (.015) .86 1201 Hastelloy X (.039) (.008) (.54)

1 206-2 Rene-41 .21, 0.030 (0.004) .006 .21, .040

1207-1 Waspaloy(l) .043 .34 .005 .009 ,47 2 .026 1207-2 Waspaloy(2) .083 .29 5 .005 .009 .6I 5 .033 1208-1 Inco 718(1) .046 .38, .003 .01, .434 .14, 1208-2 Inco 718(2) .022 .230 .003 .007 .08 3 .077

SRM Ni Cr Mo Co Ti Al Nb Ta Fe W B Zr

1 198 40.1 12.9 6.08 .70 2.59 .24 K.02) 36.2 (0.2) (.0064) (014)

1199 10.2 19.9 K0.02) 51.6 K0.01) (<-02) 0.6, 15.4 1200 20.0 19.9 4.00 42.0 (.03) 3.1, 1.08 3.19 3.86 1201 45.7 20.7 9.1 8 0.56 K.oi) (<0.02) 23.2 (0.15) 1206-2 53.3 19.7 10.30 11.5, 2.94 1.74 0.46

1207-1 56.1 18.88 4.50 13.0, 3.09 1.26 2.22 1207-2 55.7 19.44 4.34 13.50 2.54 1.3, 2.09

1208-1 51.9 17.5 3.24 0.82 0.46 (0.15) 5.38 (0.012) 19.2 1208-2 51.5 17.4 3.13 .76 (.8,) (85) 4.9g (.012) 19.8

22
Tool Steels

Chemical Composition (Nominal Weight Percent) SRM Type Mn Si Cu Cr V Mo W Co

436 Special (Cr6-Mo3-W10) 0.21 0.32 0.075 6.02 0.63 2.80 9.7 437 837 D837 Special (Cr8-Mo2-W3-Co3) .48 .53 7.79 3.04 1.50 2.8 2.9 438 D838 Mo High Speed ( AISI-SAE-M30) .20 .17 .17 4.66 1.17 8.26 1.7 4.9 439 Mo High Speed ( AISI-SAE-M36) .18 .21 .12 2.72 1.50 4.61 5.7 7.8 440 840 D840 Special W High Speed

(Cr2-W13-Col2) .15 .14 .059 2.12 2.11 0.070 13.0 11.8 441 D841 W High Speed (AISI-SAE-TI) . .

.27 .16 .072 4.20 1.13 .84 18.5

SRM Type C Mn P S Si Cu Ni Cr V Mo W Co

1 157 Tool (AISI M2) 0.836 0.34 0.011 0.004 0.18 0.088 0.228 4.36 1.82 4.86 6.28 0.028

Steelmaking Alloys

These SRM's provide standards of known chemical composition primarily for checking chemical methods

of analysis for the major constituents and for selected minor elements covered by ASTM specifications.

They are furnished as fine powders (usually <0.1 mm). These SRM's are finding increased use in calibration

with instrumental methods of analysis.

Chemical Composition (Nominal Weight Percent)

SRM Type

Wt/Unit

(grams) c Mn P S Si Cu Ni

57 Refined Silicon 60 0.034 0.008 0.005 96.80 0.02 0.002 58a Ferrosilicon (73% Si) 75 0.014 .16 .009 <.002 73.20 .024 .012 59a Ferrosilicon (50% Si) 50 .04 .76 .016 48.2 .05 .03 195 Ferrosilicon (75% Si) Hi-Purity 75 .034 .17 .02 <.002 75.3 .047 .032 64c Ferrochromium (HC) 100 4.68 .16 .020 .067 1.22 .005 .43

196 Ferrochromium (LC) 100 0.035 .28 0.38

71 Calcium Molybdate 60 90 Ferrophosphorus 75 26.2 340 Ferroniobium 100 .060 1.71 0.035 4.39 358 Ferromanganese (HC) In Prep

SRM Cr V Mo Ti Al Nb Zr Ca Mg Fe B N Co

57 0.025 0.10 0.67 0.025 0.73 0.01 0.65 58a .020 (0.002) (0.01) .051 .95 .002 25.22 0.0010 <0.01

59a .08 .35 .04 50.0 .06 195 .047 (.01) .037 (.05) «.02) 23.6 .001 <.01

64c 68.00 .15 .02 24.98 0.045 .051

196 70.87 .12

71 35.3 .06 1.92 90

340 .89 57.51 Ta 3.73 358

23
Cast Irons (Chip Form)

This group of cast iron SRM's is similar to the chip-form steels and was prepared for use in checking

chemical methods in the cast iron industry. These SRM's are furnished in 150-g units (unless otherwise

noted) and in the form of chips; usually sized between 0.7 to 1.2 mm. They are prepared by lathe cutting of

chips with a multiple-tooth cutting tool from thin-wall cylindrical castings especially made for the purpose. Supplied with each SRM is a Certificate of Analysis listing the chemical composition determined at NBS

and other laboratories that cooperated in the certification of the SRM's. For SRM 365, Electrolytic Iron, the

Certificate provides information on these additional elements: W, Nb, Ag, Zn, Ge, O, H,Ta, Nd, Zr, Sb, Bi,

Ca, Mg, Se, Te, Ce, La, Pr, Au, Hf, and Fe. (Values in parentheses are not certified, but are given for information only.)

Chemical Composition (Nominal Weight Percent)

SRM Type Total

C

Graphitic Mn P Grav

S

Comb Si Cu

3c White (1 10 g) 2.30 0.308 0.100 0.096 1.28 0.053 4k Cast 3.22 2.6 5 0.825 .149 .043 1.33 •243 5L Cast 2.59 1.99 .68 .280 .123 1.83 1.01 6g Cast 2.85 2.01 1.05 .557 .124 1.05 0.502 7g Cast (High Phosphorus) 2.69 2.59 0.612 .794 0.061 .060 2.41 .128

82b Cast (Ni-Cr) 2.85 2.37 .745 .025 .007 2.10 .038 107b Cast (Ni-Cr-Mo) 2.75 1.87 .510 .058 .067 .067 1.35 .235 115a Cast (Cu-Ni-Cr) 2.62 1.96 1.00 .086 .064 .065 2.13 5.52

I22f Cast (Car Wheel) 3.47 2.78 0.528 .349 .074 0.510 0.033

341 Ductile 1.81 1.23 .92 .024 .007 .007 2.44 .152 342 Nodular 2.45 2.14 .369 .020 .014 .014 2.85 .14 342a Nodular 1.86 1.38 .275 .018 .006 2.73 .14 365 Electrolytic Iron 0.0070 .0057 .003 .006 0.0076 .0058

SRM Ni Cr V Mo Co Ti As Sn Al

(total) Mg N

3c 0.012 0.046 0.007 0.002 4k .042 .1 16 .024 .040 (0.03) (0.03) (0.004) (0.004) (0.0016) 5L .086 .15 .036 .020 .05 <.005 .006 6g .135 .370 .056 .035 .059 .042 .005 7g .120 .048 .010 .012 .044 .014 .004

82b 1.22 .333 .027 .002 .027 107b 2.12 .560 .008 .750 .016 (.008)

1 15a 14.49 1.98 .014 .050 .020

122f 0.080

341 20.32 1.98 .012 .010 .018 0.068 342 0.023 0.032 .005 .009 .019 .053 342a .06 .034 .020 .069 365 .041 .0072 .0006 .0050 0.0070 .0006 .0002 (.0002) (.0007) N .001 Pb .00002

Cast Steels, White Cast Irons, Ductile Irons and Blast Furance Irons (Solid Form)

These chill-cast SRM's were prepared for use in analytical control of cast steels and cast irons by rapid

instrumental methods. Although employed in x-ray spectroscopic analysis, they are particularly useful for calibrating vacuum optical emission spectrometers because they permit the determination of carbon,

phosphorus, and sulfur in addition to the metallic elements.

The "benchmark" concept was used in preparing three new white irons (1145, 1146, and 1150) with

compositions tailored to provide low, nominal, and high values for elements normally specified in cast iron

materials, as well as most malleable, ductile, and grey irons. A concentration range for a number of trace

24
elements of interest was provided to enhance the utility of the standards. The planning, preparation,

homogeneity testing, and analysis of these SRM's were done through a cooperative Industry-ASTM-NBS

program.

These SRM's are chill-cast sections. Details of the preparation and intended use of the SRM's are given

in the NBS Miscellaneous Publication 260-1. (See inside back cover for ordering instructions.)

(Values in parentheses are not certified, but are given for information only.)

Chemical Composition (Nominal Weight Percent) SRM Type C Mn P S Si Cu Ni Cr

1138 Cast Steel (No. 1) 0.120 0.43 0.053 0.053 0.34 0.09 0.10 0.12 1139a Cast Steel (No. 2) .790 .92 .012 .013 .80 .47 .98 2.1»

1 140b Ductile (No. 1) INPREP

1141b Ductile (No. 2) IN PREP

1142b Ductile (No. 3) IN PREP

1143a Blast Furnace (1) 4.08 2% .164 .067 1.60 •138 .11, 0.1

3 1144a Blast Furnace (2) 4.32 1.23 .084 .083 0.1

2 .09, .06, .029 1145 White Cast Iron 2.85 0.040 .24 .21 .29 .52 .59 .67 1146 White Cast Iron 2.01 1.64 .55 .022 3.68 1.49 3.01 2.56 1150 White Cast Iron 3.48 0.81 .063 .070 1.24 0.092 0.074 0.95

SRM V Mo Ti As Al Co

1138 0.020 0.05 1139a .26 .51 (0.004) K0.005) (0.13) 1140b 1141b

1142b

1143a .018 .004) .087 (.003) (.008) 0.0

6 1144a .025 (.007) .32 (.004) K.005) ,02 2 1145 .11 .48 .017 0.058 1146 .20 1.51 .20 .13 1150 .034 0.074 .045 .014

Nonferrous Alloys (Chip Form)

These SRM's provide materials of known composition for checking the performance of chemical

methods of analysis and in calibration with instrumental methods. The aluminum-, magnesium-, and zinc- base alloys are furnished as approximately 0.4 to 1.4 mm chips prepared by cutting thin wall castings or wrought bar stock. Certificates of Analysis provided with these standards give the composition as deter- mined at NBS, and most give values obtained by industrial and other outside laboratories cooperating in certification of the standards.

Aluminum-Base Alloys

Chemical Composition (Nominal Weight Percent)

SRM Type Wt/Unit

(grams)

Mn Si Cu Ni Cr V Ti Sn Ga Fe Pb Mg Zn

85b

87a Wrought .... Al-Si

75

75

0.61 .260.18

6.24

3.99 0.30

0.084

• 57

0.211

.11

0.006 <.01

0.022

.18 0.05

0.019

.02

0.24

.61

0.021

.10

1.49 0.37

0.030

.16

25
Aluminum "Benchmark" Alloys

SRM Type

855 856

857

Casting Alloy (356) IN PREP

Casting Alloy (380) IN PREP

Pure Aluminum IN PREP

858 859Alloy 601 1 IN PREP

Alloy 7075 IN PREP

T

Cobalt-Base Alloys

Chemical Composition (Nominal Weight Percent)

SRM Type Wt/Unit

(grams)

Co Ni Cr Mo W Nb

168a Co4I-Mo4-Nb3-Tal-W4

IN PREP

SRM Ta Fe Mn C P S Si Cu V Ti

168a

Cooper- Base Alloys

SRM's 871, 872, 874, 875, 879, and 880 are fine granules produced by a water atomization technique for use primarily in checking chemical methods of analysis. The homogeneity of these materials is exceptionally high, and for certain alloys such as SRM 872, Phosphor Bronze (CDA 544) it is the only form that can

readily be prepared to exhibit acceptable homogeneity. For many alloys (for which homogeneity requirements can be met), both granules (or chips) for chemical analysis and solids for optical emission and x-ray

fluorescence methods, are desirable.

Chemical Composition (Nominal Weight Percent) SRM Type Wt/Unit

(grams)

Cu Ni Fe Zn Pb

37e Brass, Sheet 150 69.61 0.53 0.004 27.85 1.00

1 58a Bronze, Silicon 150 90.93 .001 1.23 2.08 0.097

184 Bronze, Leaded Tin 150 88.96 .50 0.005 2.69 1.44 871 Bronze, Phosphor (CDA 521) IN PREP

872 Bronze, Phosphor (CDA 544) IN PREP

874 Cupro-Nickel, 10%

(CDA 706) "High-Purity" 100 88.49 10.18 1.22 0.002 <0.0005

875 Cupro-Nickel, 10%

(CDA 706) "Doped" 100 87.83 10.42 1.45 .11 .0092 879 Nickel Silver (CDA 762) IN PREP

880 Nickel Silver (CDA 770) IN PREP

SRM Mn Sb Sn P Si Al Cd Sc

37e 158a

184

871

1.11

1.00 0.96

6.38

0.026

.009

3.03 0.46

872 874

875 879

880

0.0020 C0007

<0.001 <.00l0.007

.009

.002 .0020

(0.0006)

(.0008) <0.0002

.0022

0.00015

.0004

26
SRM Bi O C H S As Mg Ti

37e

158a

184

871 872 874

875 879

880

<0.0002

.003

(0.06)

(.14)

(0.0028)

(.0035)

(0.0016)

(.004)

(0.0011)

(.0011)

(<0.0006)

(.0010)

(0.0002)

(.0010)

(0.0001) (<.0002)

Copper "Benchmark" Standards

The copper "benchmark" standards were prepared in a cooperative Industry-ASTM-NBS program and

were designed primarily for use in calibration with optical emission methods of analysis. They should also serve in the development of other new or improved trace methods of analysis. Twelve different compositions

are to be issued as 25 SRM's. Cu "0" and Cu XI will be issued in chip form only. Cu IV is available only in rod form 6.60 mm in diameter and 103 mm long, but is to be issued later as a water-atomized powder. Cul, II, III, V, VI, and VII are available both as chips and as rods 6.35 mm in diameter. 103 mm long. Cu VIII, IX,

and X will be issued as chill-cast and unidirectionally solidfied blocks 32 mm square and 19 mm thick. Cu VIII-Cu X are phosphorized copper containing a nominal concentration range from about 10 to 500 ppm

for the same 20 trace elements contained in the other copper "benchmark" SRM's, plus 5 to 8 additional

elements. These SRM's are applicable for x-ray fluorescence methods of analysis and, because of deliberate

additions of gold and silver (in ratios of 1 to 4), for calibration of fire assay equipment.

Chemical Composition (Nominal Parts Per Million By Weight)

SRM Type Wt/Unit

(grams)

Sb As Bi Cr Co Fe Pb Mn Cu (Wt%)

393 Unalloyed—Cu "O" IN PREP.

394 Unalloyed—Cu I 50 4.5 2.6 0.35 2.0 0.5 147 26.5 3.7 99.908 395 Unalloyed—Cu II 50 8.0 1.6 .50 6.0 .3 96 3.25 5.3 99.944 396 Unalloyed—Cu III 50 <1 <2 .07 4.3 .4 143 0.41 7.5 99.955 398 Unalloyed—Cu V 50 7.5 25 2.0 (0.3) 2.8 11.4 9.9 (0.3) 99.98 399 Unalloyed—Cu VI 50 30 47 10.5 (.5) 0.5 20.0 114 (.3) 99.79 400 Unalloyed—Cu VII 50 102 140 24.5 (.5) .6 41 128 (2) 99.70 454 Unalloyed—Cu XI IN PREP...

SRM Ni Se Ag S Te Sn Zn Al Cd Au Mg O Si

393 394

395 396

398 399 400

11.7 5.4

4.2

7.0 506

603

2.1 0.60

.50 14 (-95)

-250)

50.5

12.2 3.30

20.1 116.8

181

15

13

9.5 (11)

(10)

(9)

0.57

.32 <.l

11(-50)

(-155)

70

1.5 0.8

4.8 (-90)

(-200)

405

12.2

5.0 24

45

1 14

«2)

(<2) «2)

«2)

«2)

«2)

(0.5)

(.4)

(.6) (22) «D

«D

(0.07)

(.13) K.05)

(.1) (4) (10)

«D

«D

«1)

«D

«D

«D

(230)

(435)

(270)

(30) (950)

1025)

(<2) «2)

«2)

«2)

«2)

«2)

454

27
Lead-Base Alloys

Chemical Composition (Nominal Weight Percent)

SRM Type

Wt/Unit

(gram)

(Other Forms)

Cu Ni As Sn Sb Bi Ag Fe

53e

127b

Bearing Metal (84Pb-10Sb-6Sn)

Solder (40Sn-60Pb)

. 150

. 150

1 132 11310.054

.011

0.003

.012

0.057

.01

5.84

39.3

10.26 0.430.052

.06 0.01 <0.001

SRM Type Wt/Unit

(grams)

Mn

Mag

Si

nesium-Basc

Cu

! Alloys

Ni Al Pb Fe Zn

171 Alloy 100 0.45 0.01 18 0.01 12 0.0009 2.98 0.0033 0.0018 1.05

Nickel-Base Alloys

Chemical Composition (Nominal Weight Percent)

SRM Type Wt/Unit

(grams)

C Mn P S Si Cu Ni Cr

349 882 Ni57-Cr20 150

150

0.08

.006

0.43 <.003

0.002 <0.10.29 <.020.006

31.0

57.15 65.219.50 Ni66-Cu31-A13

SRM V Mo W Co Ti Al B Fe Nb Ta Zr

349 0.081 4.04 <0.01 13.95 3.05 1.23 0.0046 0.13 <0.01 <0.01 0.081 882 0.6 2.85 <.01

Trace Elements in Nickel-Base Superalloy

The Gas Turbine Panel of the ASTM-ASME-MPG Joint Committee, through recommendation of its Task Force on Trace Elements in Superalloys, prepared a set of three "Tracealloy" materials, which have the same common matrix. These were given to NBS for "definitive analysis" of: Pb, Bi, Se, Te, and Tl; trace elements that vary over the concentration range of interest. These SRM's 897, 898, and 899 are in the form of

fine particles.

Nominal Trace Composition (Parts Per Million by Weight)

SRM Type Pb Bi Se Te Tl

897 "Tracealloy" A . IN PREP (10) (0.5) (10) (1) (0.5) 898 "Tracealloy" B .

IN PREP (2) (1) (2) (0.5) (3) 899 "Tracealloy" C. . IN PREP (5) (0.2) (8) (5) (0.3)

Approximate Base Composition (Weight Percent) C Cr Co Ni W Nb Al Ti B Zr Ta Hf

897 (0.12) (12.0) (8.5) (Bal) (1.75) (0.9) (2.0) (2.0) (0.010) (0.10) (1.75) (1.2) 898 (0.12) (12.0) (8.5) (Bal) (1.75) (0.9) (2.0) (2.0) (0.010) (0.10) (1.75) (1.2) 899 (0.12) (12.0) (8.5) (Bal) (1.75) (0.9) (2.0) (2.0) (0.010) (0.10) (1.75) (1.2)

2X
Nickel Oxide

The nickel oxide SRM's are available primarily for application in the electronics industry to the analysis

of cathode grade nickel. The "Standard Method for Spectrochemical Analysis of Thermionic Nickel Alloys

by the Powder-DC Arc Technique," ASTM Designation El 29, is based on calibration with these standards.

The values given are for the percentage of the element in nickel oxide. Values in parentheses are not certified,

but are given for information only.

Chemical Composition (Nominal Weight Percent)

SRM Type Wt/Unit

(grams)

Mn Si Cu Cr Co Ti Al Fe Mg

671 Oxide 1 25 0.13 0.047 0.20 0.025 0.31 0.024 0.009 0.39 0.030 672 Oxide 2 25 .095 .11 .018 .003 .55 .009 .004 .079 .020 673 Oxide 3 25 .0037 .006 .002 .0003 .016 .003 .001 .029 .003

SRM Pb Se Bi As Sn Sb Cd Ga Ag Te Tl Zn

671 16 2.0 0.07 59 2.7 0.4 (0.7) (0.8) (0.5 S ) K0.2) K0.1) (16(1) 672 38 0.40 •28 74 4 .5 (1.7) (.4) (•26) K.2) K.l) (140) 673 4 .20 .06 0.4 <0.5 <0.2 (0.95) K0.1) K.l) (.4) K.l) (1.7)

Selenium

Chemical Composition (Nominal Parts Per Million) SRM Type Wt/Unit

(grams)

Mn S Cu Ni Cr V Mo Co As Sn

726 Selenium, Intermediate Purity .... 450 <0.3 12 + 3 <1 <0.5 <1 N.D <0.3 N.D <2 <1

SRM Al B Pb Bi Ag Ca Mg Te Fe CI Ti Be Cd In

726 <1 <1 <1 N.D. <l <1 <1 0.3 ± 0.1 1 <0.5 <0.5 N.D. N.D N.D.

N.D. = Not detected at limits of detection of <0.5 ppm.

Tin-Base Alloys

Chemical Composition (Nominal Weight Percent)

SRM Type Wt/Unit

(grams)

Pb Sn Sb Bi Cu Fe As Ag Ni

54d Bearing Metal 170 0.62 88.57 7.04 0.044 3.62 0.027 0.088 0.0032 0.0027

Titanium-Base Alloys

Chemical Composition (Nominal Weight Percent)

SRM Type Wt/Unit

(grams)

C Mn Si Cu v Mo Sn Al Fe N

173a 6A1-4V 100 0.025 0.037 0.002 4.06 0.005 6.47 0.15 0.018

174 4Al-4Mn 100 4.57 .015 4.27 .175 .012 176 5Al-2.5Sn 100 .015 0.0008 .003 .0003 2.47 5.16 .070 .010 650 Unalloyed (IN PREP)

651 Unalloyed (IN PREP)

652 Unalloyed (IN PREP)

29
Zinc-Base

Chemical Composition (Nominal Weight Percent) SRM Type Wt/Unit

(grams)

Mn Cu Ni Sn Al Cd Fe Pb Ap Mo

94c Die Casting

Alloy 150 0.014 1.01 0.006 0.006 4.13 0.002 0.018 0.006 0.042 728 Zinc 450 0.00057 (.000002) .00012 .00027 .001 1

0.00011

Zirconium-Base

Chemical Composition (Nominal Parts Per Million)

SRM Type

Wt/Unit

(grams)

C Mn Si Cu Ni Cr Ti Sn (Wt%)

Fe N U

360a Zircaloy-2 100 136 3 51 140 554 1060 27 1.42 1441 43 0.15

Nonferrous Alloys (Solid Form)

These SRM's are designed to fill the basic needs of the nonferrous primary and secondary metals

industries for analytical control, primarily with optical emission and x-ray spectroscopic methods. Both

nominal chemical composition and analytical range SRM's have been prepared for many of the commercially important nonferrous alloy systems.

Aluminum "Benchmark" Standards

Aluminum "benchmark" standards are being prepared in a cooperative Industry-ASTM-NBS program.

Five SRM's in disk form, are intended for use primarily in optical emission and x-ray spectrometric methods

of analysis. Selection was made to include (annealed) aluminum alloys, 6011 (Modified) and 7075/7078; two

large tonnage casting alloys 356 and 380; and a high purity aluminum. These materials will also be available

in the form of chips, for checking chemical methods of analysis (See page 26).

Chemical Composition (Nominal Weight Percent) SRM Type Size Si Fe Cu Mn Cr Ni

C1255 Casting (356) IN PREP

CI256 Casting (A380) IN PREP

1257 Pure Aluminum I IN PREP

1258 Alloy 6011 35mm dia X

19mm thick 0.78 0.079 0.84 0.48 0.0011 0.0006 1259 Alloy 7075 35mm dia X

19mm thick .18 .205 1.60 .079 .173 .063

SRM Zn Mg Be

CI 255 CI 256

1257

1258 1.03 0.98 <0.0001

1259 5.44 2.48 .0025

30
Copper-Base Alloys

A number of copper-base alloy SRM's were prepared to provide for analytical control by rapid instru- mental methods in the copper industry. These SRM's are for calibration of optical emission and x-ray spec- troscopic equipment. Eight groups were prepared in two forms: chill-cast (with "C" prefix) for the producer

(blocks, 31 mm square, 19 mm thick), and wrought for the consumer (disks, 31 mm in diameter and 19 mm

thick). Both forms have nearly identical chemical compositions. Consequently, when the supply of one form

is exhausted, the other is the recommended replacement. For each of the eight principal copper-base alloys, three SRM's were prepared to comprise a "nominal-composition", and both a low- and high-composition

standard. To make the cartridge-brass SRM's more widely applicable, a number of trace elements were

purposely added and certified. The beryllium copper SRM's are representative of the nominal chemical composition of three Copper and Brass Research Association (CABRA) alloy designation. Values in parentheses

are not certified, but are given for information only.

Chemical Composition (Nominal Weight Percent) SRM Type Cu Zn Pb Fe Sn Ni Al Sb As

1101 CI 101 69.50 30.30 0.05 0.037 0.016 0.013 0.0006 0.012 0.009 1102 Cartridge Brass C 72.85 27.10 .020 .01

.006 .005 .0007 .005 .004

CI 103 Free-Cutting Brass A . . . . 59.23 35.7 3.73 .26 .88 .16 — — —

1 104 CI 104 Free-Cutting Brass B . . . . 61.33 35.3 2.77 .088 .43 .070 — — —

CI 105 Free-Cutting Brass C . . . . 63.7 34.0 2.0 .044 .21 .043 — — —

1 106 CI 106 Naval Brass A 59.08 40.08 0.032 .004 .74 .025

1 107 CI 107 Naval Brass B 61.21 37.34 .18 .037 1.04 .098 1108 CI 108 Naval Brass C 64.95 34.42 .063 .050 0.39 .033

1109 CI 109 Red Brass A 82.2 17.4 .075 .053 .10 .10 1110 CI 1 10 Red Brass B 84.59 15.20 .033 .033 .051 .053 1111 Cllll Red Brass C 87.14 12.81 .013 .010 .019 .022

1112 CI 1 12 Gilding Metal A 93.38 6.30 .057 .070 .12 .100 1113 CI 1 13 Gilding Metal B 95.03 4.80 .026 .043 .064 .057 1114 CI 1 14 Gilding Metal C 96.45 3.47 .012 .017 .027 .021

1115 CI 1 15 Commercial Bronze A . . . 87.96 11.73 .013 .13 10 .074 1116 CI 1 16 Commercial Bronze B . . . 90.37 9.44 .042 .046 .044 .048 1117 CI 1 17 Commercial Bronze C . . . 93.01 6.87 .069 .014 .021 .020

1118 CI 1 18 Aluminum Brass A 75.1 21.9 .025 .065 2.80 .010 .007 1119 CI 1 19 Aluminum Brass B 77.1 20.5 .050 .030 2.14 .050 .040 1120 CI 120 Aluminum Brass C 80.1 18.1 .105 .015 1.46 .100 .090

CI 121 Beryllium Copper CA-172 97.49 (0.01) (.002) .085 .01 .012 0.07 1122 CI 122 Beryllium Copper CA-170 97.45 (.01) (.003) .16 (.01) (.01) .17 1123 CI 123 Beryllium Copper CA-175 97.10 (.01) (.001) .04 (01) (.01) .02 1275 Cupro-Nickel (CDA 706) IN PREP

1276 Cupro-Nickel (CDA 715) IN PREP

31
SRM Be Bi Cd Mn P Si Ag Te Co Cr

1 101 1102 CI 101 0.00055

.00003

0.0004

.0005

0.0055

.0045

0.0055

.0045

0.0020

.0048

(0.005)

(.002)

0.003

.0010

0.0015

.0003

1 104 CI 103 CI 104 CI 105

.003

.005

.003

— —

1106

1 107

1 108

CI 106 CI 107 CI 108

—— —

— —

—

.005

.025

———

—

—

— —— —

—

1 109

I 1 10

I I 1 1

1112

1113

1 1 14

CI 109 CI110

CI 1 1

CI 112 CI 1 13 CI 1 14

.006 — — — —

.009

.008

.009

— — — — —

1115 1116

1117

C1115

CI 1 16 CI ! 17

— — — — .005

.008 .002

- — — — — —

1 118 1119

1 120

CI 1 18 CI 1 19 CI 120

— — — — .13 .070

.018

.0021 .0015

.0011

— — — —

1 122 1123

1275

1276

CI 121 CI 122 CI 1231.90

1.75 0.46 — —

(.004)

(.004)

(.002)

(.005) (.004)

(.002)

.11 .17

.03

(.005)

(.005)

(.009) —

0.295

.220

2.35

(0 002)

(.002)

(.002)

Copper "Benchmark" Standards

The copper "benchmark" standards were prepared in a cooperative Industry-ASTM-NBS program and

were designed primarily for use in calibration with optical emission methods of analysis. They should also serve in the development of other new or improved trace methods of analysis. Twelve different compositions

are to be issued as 25 SRM's. Cu "0" and Cu XI will be issued in chip form only. Cu IV is available only in rod form 6.60 mm in diameter and 103 mm long, but is to be issued later as a water-atomized powder. Cul,

II, III, V, VI, and VII are available both as chips and as rods 6.35 mm in diameter, 103 mm long. Cu VIII, IX,

and X will be issued as chill-cast and unidirectionally solidfied blocks 32 mm square and 19 mm thick, Cu

VIII-Cu X are phosphorized copper containing a nominal concentration range from about 10 to 500 ppm for the same 20 trace elements contained in the other copper "benchmark" SRM's, plus 5 to 8 additional ele- ments. These SRM's are applicable for x-ray fluorescence methods of analysis and, because of deliberate

additions of gold and silver (in ratios of 1 to 4), for calibration of fire assay equipment.

Chemical Composition (Nominal Parts Per Million) SRM Type Size Cu(Wt%) Sb As Bi Fe

494 Unalloyed —Cu I rod 99.91 4.5 2.6 0.35 ("-155) 495 Unalloyed—Cu 11 rod 99.94 8.0 1.6 .50 (--100) 496 Unalloyed—Cu III rod 99.95 <1 <0.2 .07 ('-150) 457 Unalloyed—Cu IV rod 99.96 0.2 0.2 .2 2.0 498 Unalloyed —Cu V . , . . rod 99.98 7.4 25 2.0 1

499 Unalloyed—Cu VI rod 99.79 30 47 10.5 21 500 Unalloyed—Cu VII rod 99.70 100 140 25 42

1251 Unalloyed—Cu VIII IN PREP disk 1252 Unalloyed—CulX IN PREP disk 1253 Unalloyed —Cu X IN PREP disk

32
SRM Pb Mn Ni Se Ag Te Sn Zn

ACtA ZD. J J. / II./ 1. 1 50 0.6 70 400

ACt Q 495 J.Z J.J J.

0.6 12.2 .3 1 .5 1

ACt£. 496 U.4 7 ^ /.J A "1 4.2 .5 3.3 <. 1 0.8 5.0

A CI 457 . J <^.\). 1 U.6 3.3 8.

.5 <.2 ?1 498 I

(.J)

"7 A t A 14 20.

1

5 25

ACiO 4VV 1 14 (.3) 51)4 1 14 (~50) (~90) 41 500 1 TO

(•2) 603 176 (~ 155) (-250) 1 1 1

1 25 1 1252

1253

SRM Al Cd Cr Co Au Mg O S

494 (<2) (0.5) 2.0 0.5 (0.07) KD (230) 15 495 (<2) (.4) 6.0 .3 (.13) «D (435) 13 496 «2) (.6) 4.3 .4 K-05) «D (270) 9 497 «2) «D (0.3) (.2) K.05) «D (360) (4) 498 «2) (22) (.3) 2.7 (.1) «D (30) (11) 499 «2) «D (.5) 0.5 (4) «1) (950) (10) 500 (<2) «D (.5) .5 (10) «D (1025) (9) 1251 1252

1253

Lead-Base Alloys

Chemical Composition (Nominal Weight Percent) SRM

31.4 mm D X

19 mm thick Type

Other Forms Cu Ni As Sn Sb Bi Ag Fe

1131 1132 Solder Pb60-Sn40

Bearing Metal

127b

53e

0.011

.054

0.012

.003

0.01 .05739.3 5.840.43

10.2

0.06

.052

0.01 CO.OOl

Nickel-Base Alloys

SRM Chemical Composition (Nominal Weight Percent)

31 mm D X

'

19 mm thick Type C Mn P S Si Cu Ni Cr Mo Co Fe

1159 Ni48, balance Fe 0.007 0.305 0.003 0.003 0.32 0.038 48.2 0.06 0.010 0.022 51.0 1160 Ni80, Mo4, balance Fe .... .019 .550 .003 .001 .37 .021 80.3 .05 4.35 .054 14.3

Titanium-Base Alloys

SRM Chemical Composition (Nominal Weight Percent)

31 mm D X

19 mm thick Type Mn Cr Fe Mo Al V

641 8Mn (A) 6.68 642 8Mn (B) 9.08 643 8Mn (C) 11.68 644 2Cr-2Fe-2Mo (A) 1.03 1.36 3.61 645 2Cr-2Fe-2Mo (B) 1.96 2.07 2.38

646 2Cr-2Fe-2Mo (C) 3.43 2.14 1.11 654a* 6A1-4V (B) K0.I) (0.20) (0.20) K0.05) 6.34 3.95

*31 mm D X 6.4 mm thick.

33
Zinc-Base Alloys

Zinc-base alloy SRM's are available ranging from very high-purity zinc to commercial materials such as

spelter and die-casting alloy compositions. They are supplied as bar segments (disks) intended for calibrating and

checking optical emission and x-ray spectroscopic techniques. The certificate of analysis supplied with each gives the chemical composition determined at NBS and values determined by other laboratories that have cooperated in the certification of the SRM's. For high-purity Zinc, see High-Purity Metals, page 36. (Values in parentheses are not certified, but are given for information only.)

Chemical Composition (Nominal Weight Percent) SRM Type Cu Al Mg Fe Pb Cd Sn Cr

625 Zinc-base A-ASTM AG 40A 0.034 3.06 0.070 0.036 0.0014 0.0007 0.0006 0.0128 626 Zinc-base B-ASTM AG 40A .056 3.56 .020 .103 .0022 .0016 .0012 .0395 627 Zinc-base C-ASTM AG 40A .132 3.88 .030 .023 .0082 .0051 .0042 .0038 628 Zinc-base D-ASTM AC 41 A .611 4.59 .0094 .066 .0045 .0040 .0017 .0087 629 Zinc-base E-ASTM AC 41 A 1.50 5.15 .094 .017 .0135 .0155 .012 .0008

630 Zinc-base F-ASTM AC 41 A 0.976 4.30 .030 .023 .0083 .0048 .0040 .0031 631 Zinc spelter (modified) .0013 0.50 (<.001) .005 (.001) .0002 .0001 .0001

SRM Mn Ni Si In Ga Ca Ag Ge

625 0.031 0.0184 0.017 626 .048 .047 .042 627 .014 .0029 .021 628 .0091 .030 .009 629 .0017 .0075 .078

630 .0106 .0027 .022 631 .0015 (<.0005) <.002 (0.0023) (0.002) <0.001 K0.0005) (0.0002)

Zirconium-Base Alloys

SRM

31 mm D X

9.5 mm thick Type C Cr

Che

Cu

mical

Fe

Compc

Mn

sition

Mo

Nomir

Ni

al Wei

N

ght Pei

Si

cent)

Ti W U

1212a

1234

1235

1236

1237

1238

1239

Zinconium C

Unalloyed Zirconium A (IN PREP) .

Unalloyed Zirconium B (IN PREP) .

Unalloyed Zirconium C (IN PREP) .

Zircaloy D (IN PREP)

Zircaloy E (IN PREP)

Zircaloy F (IN PREP)

0.28 0.063 0.015 0.071 0.030 0.012 0.043 0.012 0.035 0.015 0.014 0.010

34
Gases in Metals

Certified for Nitrogen (Wt %)

Steels (Chip Form) Cast Irons (Chip Form)

SRM Type Nitrogen

I2h Basic Open Hearth, 0.4C 0.006 32e Ni-Cr (SAE 3140) .009 jUC W 1 ft CrA VI .U

1 73c Stainless (Crl3) (SAE 420) .037

100b Manganese (SAE TI340) .004 133a Stainless (Crl 3-Mo0.3-S0.3) .032 139b Cr-Ni-Mo (AISI 8640) .007 153a Co—Mo9-W2-Cr4-V2 (Tool) .024 160b Stainless (AISI 316) .039

Steel (Granular Form)

SRM Type Nitrogen

163 Low alloy, Crl 0.007

SRM Type Nitrogen

5L Cast iron 0.006 6e Cast iron .006 7e Cast iron (high phosphorus) .004

Titanium Base (Chip Form)

SRM Type Nitrogen

173a 6A1-4V 0.018

174 4Al-4Mn .012 176 5Al-2.5Sn .010

Zirconium Base Alloys (Chip Form)

SRM Type Nitrogen

360a Zircaloy-2 0.0043

Certified for Oxygen and Nitrogen (ppm)

The SRM's are issued as rods, 6.4 mm in diameter and 102 mm long. They are to be used in the determination of oxygen and nitrogen by vacuum fusion, inert gas fusion, and neutron activation methods.

SRM's 1095 to 1099 were prepared from the same melt as the "1200" series (1261-1625), see page 19. Values in parentheses are not certified; they are given for information only.

SRM Type Oxygen Nitrogen

1090 Ingot iron 491 (60) 1091 Stainless steel (AISI 431) 131 (945) 1092 Vacuum-melted steel 28 (4) 1093 Valve steel 60 (4807) 1094 Maraging steel 4.5 (71)

*1095 AISI 4340 steel 9 (37) *1096 AISI 94B17 (Mod) steel 10.7 40.4 *1097 Cr-V (Mod) steel 6.6 (41)

* 1098 High Carbon (Mod) steel 10 32

* 1099 Electrolytic iron 61 (13) 1089 Set of 5: 1095, 1096, 1097, 1098, and 1099

*Sold only in sets as SRM 1089.

Certified for Hydrogen or Oxygen

SRM's intended for determination of hydrogen and oxygen in titanium-base alloys are available in sheet and rod form. These were designed primarily for calibration of vacuum fusion or inert gas fusion equipment.

SRM Type Unit Size Wt/Unit

(grams)

Oxygen

(ppm)

Hydrogen

(Wt %)

352a Unalloyed titanium for hydrogen IN PREP

354 Unalloyed titanium for hydrogen 1/4 in square X 0.05 in thick 20 0.0215 355 Unalloyed titanium Rod-1/2 in D X 2 in long 3031 356 Alloy, 6A1-4V Rod-.425 in D X 1 3/4 in long 1332

35
High-Purity Metals

Very high-purity metal SRM's are being made available to fill the needs of analysis determining impurity elements in high-purity metal materials. They are intended to serve as bench marks in calibration of

methods and equipment; also, they are expected to be valuable in the development of new or improved

methods and techniques for extending the sensitivity of detection in the determination of trace constituents

in various materials by chemical, optical emission, solid mass spectroscopy, activation, and resistivity

methods of analysis.

The Certificate of Analysis supplied with each high-purity SRM gives the state-of-the-art information on chemical composition in the cooperating laboratories for the various trace determinations reported.

High-purity gold is available in both wire and rod form. The wire form (W), is intended for applications

such as spark source mass spectroscopic techniques. The low levels of impurities make it important for evaluating instrument and system blanks. The rod form (R), is intended for application in other methods of

characterization.

Platinum is available in wire form as a high-purity material and as a doped composition material. Zinc is available in a high-purity and in a less pure version. Both were prepared from the same starting

material. The high-purity material is the result of further purification by vacuum distillation, zone refining,

and degasification. The zinc is supplied in the form of semi circular bar segments.

Chemical Compositions

(Nominal Parts Per Million by Weight)

SRM Type Unit Size Cu Ni Sn Pb Zr

685W* High-Purity Gold (Wire) 1.4mm D X 102mm long 0.1 685R* High-Purity Gold (Rod) 5.9mm D X 25mm long .1 680a LI High-Purity Platinum (Wire) 0.51mm D X 102mm long

.1 <l <1 <0.l 680aL2 High-Purity Platinum (Wire) 0.51mm D X 1.0m long

68IL! Doped-Platinum (Wire) 0.5 Imm D X 102mm long

5.1 0.5 12 1

68IL2 Doped-Platinum (Wire) 0.51mm D X 1.0m long 682* High-Purity Zinc Semicircular segments 57mm D X 19mm long 0.042 (0.02) 683* Semicircular segments 57mm D X 19mm long 5.9 (.02) 11.1

SRM Ag Mg In Fe O Pd Au Rh Ir Cd Ti

6X5 W * [0.1] 0.007 0.3 [2] 685R* ['!] .007 .2 [<2]

680a LI 680aL2

<.l <l 1.3 4 0.2 <1 <0.2 <0.0I

681 1,1 681L2

2.0 12 5 7 6 9 9 1

682* (0.02) (0.1) (0.1) 683* 1.3 2.2 1.1 (0.2)

*Certificate gives upper limits for other elements found to be present.

Electron Probe Microanalytical Standards

These SRM's provide a highly homogeneous material at about the micrometer of spatial resolution. They are intended primarily for use in calibration of quantitative electron probe microanalytical techniques.

Cartridge Brass

Cartridge Brass, SRM 478, consists of two specimens: A chill-cast cube (6mm on edge) with a polished

chill-cast face and a wrought right circular cylinder (6mm in diameter and height).

SRM 478 is homogeneous at micrometer levels of spatial resolution for both copper and zinc. Details of

the homogeneity testing are in NBS Miscellaneous Publication 260-10. Extensive tests of SRM 478 with

electron probe microanalyzers show that satisfactory analytical calibration can be performed using SRM 478.

36
Fe-Cr-Ni Alloy

The Fe-Cr-Ni alloy, SRM 479, is a wafer (4.6 mm in diameter and 1 mm thick) and is characterized for chemical homogeneity of iron, chromium, and nickel at the micrometer level of spatial resolution. It is satisfactory for use as a homogeneous material for electron probe microanalysis. (NOTE: 479 is out of stock,

479a is in preparation.)

Tungsten— 20% Molybdenum

The tungsten-20% molybdenum alloy, SRM 480, is a wafer ( 1 mm in diameter and 1 mm thick) with a core

of tungsten-20% molybdenum wire embedded in pure molybdenum onto which pure tungsten has been

deposited by electroplating to provide a composite. Details on homogeneity characterization are given in NBS

Spec. Publ. 260-16. (See inside back cover for ordering instructions.)

Gold-Silver

Six color-coded wires (0.5 mm in diameter and 50 mm long) comprise SRM 481. The wires consist of a

high-purity gold and a high-purity silver wire and four wires with nominal chemical composition differences

in steps of 20%.

Gold-Copper

Six color-coded wires (0.5 mm in diameter and 50 mm long) comprise SRM 482, which is similar to the gold silver set. In both sets special precautions were taken to achieve homogeneith on a microscopic scale.

lron-3% Silicon

The iron-3% silicon microprobe, SRM 483, is a platelet (3 mm X 3 mm X 0.28 mm), and is characterized

for chemical homogeneity of iron and silicon at the micrometer level of spatial resolution. It is satisfactory for use as a homogeneous material for electron probe microanalysis.

Chemical Composition (Nominal Weight Percent)

SRM Type Au Cu Ag W Mo Si Fe

(by difference) Cr Ni Zn

478 Cartridge Brass 72.85 27.1,, 479a *Fe-Cr-Ni Alloy 480 Tungsten-20 Mo Alloy . .

78.5 21.5 481 AulOOA 100.00 Au80-Ag20B 80.05 19.96 Au60-Ag40C 60.05 39.92 Au40-Ag60D 40.00 59.90 Au20-Ag80E 22.43 77.58 AglOOF 100.00

482 AulOOA 100.00 Au80-Cu20B 80.15 19.83 Au60-Cu40C 60.36 39.64 AU40-Cu60D 40.10 59.92 AU20-Cu80E 20.12 79.85 CulOOF 100.00

483 Iron-3% Silicon 3.22 96.7-96.X

*In preparation

37
Primary, Working, and Secondary Standard Chemicals

These SRM's are high-purity chemicals defined as primary, working, and secondary standards in accordance with recommendations of the Analytical Chemistry Section of the International Union of Pure and

Applied Chemistry [Ref. Analyst 90, 251 (1965)]. These definitions are as follows: Primary Standard:

a commercially available substance of purity 100 ± 0.02 percent (Purity 99.98+ percent).

Working Standard:

a commercially available substance of purity 100 + 0.05 percent (Purity 99.95+ percent).

Secondary Standard:

a substance of lower purity which can be standardized against a primary grade standard.

SRM Type

Wtw / 1 Init i/ u nil (grams) Certified Use

Purity Stoichiometric

17a Sucrose 60 Polarimetric Value a 40h Sodium Oxalate 60 Reductometric Value 99.95 41b Dextrose (D-glucose) 70 Reductometric Value b

83c Arsenic Trioxide 75 Reductometric Value 99.99 84h Acid Potassium Phthalate 60 Acidimetric Value 99.99

136c Potassium Dichromate 60 Oxidimetric Value 99.98 350 Benzoic Acid 30 Acidimetric Value 99.98 723 Tris(hvdroxymethyl)aminomethane 50 Basimetric Value 99.97 944 Plutonium Sulfate Tetrahydrate 0.5 Assay 100 949e Plutonium Metal 0.5 Assay 99.996

950b Uranium Oxide (U,08 ) 25 Uranium Oxide Standard Value 99.968

951 Boric Acid 100 Acidimetric and Boron Isotopic Value 100.00 960 Uranium Metal 26 Assay 99.975 984 Rubidium Chloride 1 Assay and Isotopic 99.90 987 Strontium Carbonate 1 Assay and Isotopic 99.98

999 Potassium Chloride 60

.

' , Potassium Assay Standard for (- n j orj cj e

99.98 99.99

(Sucrose-Moisture <0.01 percent, Reducing Substances <0.02 percent. Ash 0.001 percent. Dextrose-Moisture 0.07 percent, Ash 0.002 percent.

Microchemical Standards

These SRM's are furnished as fine crystals of suitable homogeneity for use as standards for conventional

microchemical methods of analysis employing samples of approximately 5 mg. See also Microprobe Standards,

page 36.

SRM Type

Wt/Unit

(grams) Elements

Certified 140b Benzoic acid 2 C.H

[41c Acetanilide 2 N,C,H

142 Anisic acid 2 Methoxyl (CH 3 O-)

143c Cystine 2 S.CH.N

147 Tnphenyl phosphate 2 P

148 Nicotinic acid 2 N.C.H

2141 Urea 2 N

2142 o-Bromobenzoic Acid 2 Br 2143 p-Fluorobenzoic Acid 2 F

2144 m-Chlorobenzoic Acid 2 CI

38
Clinical Laboratory Standards

These SRM's are intended for use in calibrating apparatus and validating analytical methods used in

clinical and pathological laboratories, and to assist manufacturers of clinical products in meeting the chemical

and physical specifications required for clinical chemicals. (For details on SRM's 930D and 931b, see Spectrophotometric Filters, page 65.)

Type Purity % Wt/ Unit

900 Antiepilepsy Drug Level Assay 4 drugs/ 3 levels Set of 4 vials 911a Cholesterol 99.8 2g

912 Urea 99.7 25 g 913 Uric Acid 99.7 10 g Q14 99 8 iu g

0 1 ^ y I J QQ77,7Q zu g

y 1 O

.... , . 77.U i uu mg

Qy 1 71 i QQ77.7Q

Qy 1

1 8o 99 9 -ill g

Q 1

y 1 y 99 9 JU g 920 d- Mannitol 99.8 50 g

921 1 r\ rt i 1 98.9 1 t? 922 Trie / h vH rn y umpthvl ^ 'a mi nnmpt h ^\ hp 99.9

1 6

6 92^ Tri « f Vi \/H rr\ y \/mpt h vl \ n mi n r>mpt ri a ti P H i 1 99.7 JJ3S pg Q1A 100 0 -' u g VZJ 99 4 1

1 og VZO ** 3 g Oil Bovine Serum Albumin (7% Solution) ** 10 vials, 2.15 mL ea. 928 1 pari TMitriitp 100.00 30.711 ag

Q*)0 VzV IN! PR PP 1 fl fT IU g

930D Glass Filters for Spectrophotometry + Set of 3 931b Liquid Filters for Spectrophotometry + 3 sets of 4 932 Quartz Cuvette for Spectrophotometry + 1 each 933 Clinical Laboratory Thermometers t Set of 3 934 Clinical Laboratory Thermometer ft 1 each 935 Crystalline Potassium Dichromate (99.972)*** 15 g (UV Absorbance) Standard

936 Quinine Sulfate Dihvdrate (98.2)*** 1 g (Fluorescence) 937 Iron Metal 99.90 50 g

1968 Gallium Melting Point +++ 1 ea. *SRM 915, Calcium Carbonate, was used to develop the first referee method of analysis in clinical chemistry. This work is described

in NBS Special Publication 260-36. A Referee Method for the Determination of Calcium in Serum. (See inside of back cover for ordering instructions.) +Certified for optical properties (see p. 65.)

t Individually calibrated at 0°C and either 25, 30. or 37 °C.

f

+ lndividually calibrated at 0, 25, 30, and 37 °C. **Conforms to NCCLS specification ACC-1.

***Apparent purity, certified for optical properties. +++Melting Point Certified at 29.7723 °C. (See p. 61.)

Biological Standards

These SRM's are intended for use in the calibration of apparatus and methods used in the analysis of

biological materials for major, minor, and trace elements.

(Values in parentheses are not certified, but are given for information only.)

SRM Type

1566 Oyster Tissue IN PREP

1567 Wheat Flour

1568 Rice Flour

1569 Brewers Yeast

1570 Spinach, Trace Elements

Wt/Unil

(grams)

1571 Orchard Leaves 75 80 1573 Tomato Leaves 70 80 1575 Pine Needles 70

50 1577 Bovine Liver 50 60

39
Content in /u g/g (or where noted, wt %)

ELEMENT \^SRm/ 1566 1567 1568 1569 1570 1571 1573 1575 1577 Aluminum — 870 (0.12%) 545

A n 1 1 mAn\/ — (0.04) 2.9 (0.2) (0.005)

*\ rsenic tU.UUo; ft A 1 n i c 10 0.27 0.21 0.055 Barm m (44) Bcrvllmm — 0.027 (0.017)

Bismuth — — — (0.1) — — — (30) 33 (30) — —

Rmm1 n p (9) (1) (54) (10) (26) (9) Cadmium 0.032 0.029 (1.5) 0.1

(3) K0.5) 0.27

\ *j 1 r* 1 1 1 m 0.019% 0.014% 1.35% 2.09% 3.00% 0.41% 124

Cerium — (1-6) (0.4) Ces i u m — — — — (0.04) —

i h In r i

(690) (0.27%)

2.12 4.6 2.6 4.5 2.6 0.088

L OiMIl — 0.02 (1.5) £0.2) (0.6) (0.1) (0.18)

Copper — 2.0 2.2 _ 12 12 1

3.0 193 F u ropi um — — — (0.02) (0.04) (0.006) Fluorine (4)

fi a 1 1 1 1 1 m z (0.08)

1

1 nni 1 IU 1 iiU m1 1 1 (0.05)

Iodine — (0.17) (0.18) Iron 18.3 8.7 — 550 300 ,690 200 i 268 Lanthanum {U.i 1) (0.9) (0.2) Lead — — — 1.2 45 6.3 10.8 0.34 Lithium — — — — (0.6) — — —

Magnesium — — 0.62% (0.7%) _ 604

\A 'A n O'A npsp 8.5 20.1 — 165 91 238 675 10.3 0.00

0.0060 0.030 0. 1 55 (0.1) 0.15 0.016

\A r^lvnrlpmi

(0.4) (1.6) 0.3 (3.4) Ni c ke 1 (0.18) (0.16) (6) 1.3 (3.5)

Nitrogen — (5.9%) 2.76% (5.0%) (1.2%) 10.6% — — — 0.55% 0.21% 0.34% 0.12% (1.1%) 0.136% 0.1 12% 3.56% 1.47% 4.46% 0.37% 0.97% Rubidium (1) (7) 12.1 12 16.5 1 1.7 18.3 (0.16) (0.13) (0.03)

Selenium — 1.1 0.4 0.08 1.1 S i licon — — — — — — — (17) S liver (0.06) S od i u m 8.0 6.0 82 0.243%

\lrr\nlni m 87 37 44.9 4.8 (0.14)

Sulfur — (1900) Tellurium (5=0.002) 00.002) — — (0.01) — — —

Thallium (0.03) (0.05) (0.05) (0.05) Thorium — — — 0.12 0.064 0.17 0.037 Uranium 0.046 0.029 0.061 0.020 (0.0008)

Zinc 10.6 19.4 50 25 62 130

40
Environmental Standards

Analyzed Gases

These SRM's are intended for the calibration of apparatus used for the measurement of various components in gas mixtures, and in some cases for particular atmospheric pollutants. Each SRM is accurately

certified and is primarily intended to monitor and correct for long-term drifts in instruments used. Each

cylinder (except 1609) contained 870 liters at STP prior to certification, and thus contains somewhat less than

870 L (SRM 1609 contained 68 liters). All cylinders conform to the appropriate DOT specifications.

SRM Type Nominal Concentrations

1609 Oxygen in Nitrogen o2 , 20.95 mole percent 1658 Methane in Air CH4 , 0.951 /umol/mol (ppm)

1659 Methane in Air ruV- 114, 9 43 / 1 mr\ 1 / m/ ~» 1 ( n r\ rvi \ it III \Jl 1

I I1U 1 \ | '

1 1 1 1 1 /

1 AAA Methane-Propane in Air m0 1

/ m0 1 (ppm)

A Q7A ix mo1 / m01 (ppm)

1661 Sulfur Dioxide in N2 SO,, 480 /imol/mol (ppm)

1662 Sulfur Dioxide in N2 so2 . 942 fimo\j mol (ppm)

1663 Sulfur Dioxide in N2 so 1497 / /

fJ,Hl\Jlj c\ 1 / mIUKJI 0 1 yLJlJlH} ( nnm) so2 , 2521 /imol/mol (ppm)

1665a Propane in Air C,H 3 ppm

1 OOOd C*- H3 n K< 10 ppm

1667a Propane in Air C H 50 ppm

1668a Propane in Air r h 100 ppm

1669a Propane in Air CV-3 Hrig' 500 ppm

1673a Carbon Dioxide in Nitrogen CO 1 0 11101 /o 1674a Carbon Dioxide in Nitrogen co2 , 7.5 mol %

1675a Carbon Dioxide in Nitrogen co2 , 15.0 mol %

1 fSTTW 10 / / D CO, 10 ppm

1678b Carbon Monoxide in Nitrogen CO, 50 ppm

1679b Carbon Monoxide in Nitrogen CO, 100 ppm

1680a Carbon Monoxide in Nitrogen CO, 500 ppm

1681a Carbon Monoxide in Nitrogen CO, 1000 ppm

1683a Nitric Oxide in Nitrogen NO, 50 ppm

1684a Nitric Oxide in Nitrogen NO, 100 ppm

1685a Nitric Oxide in Nitrogen NO, 250 ppm

1686a Nitric Oxide in Nitrogen NO, 500 ppm

1687a Nitric Oxide in Nitrogen NO, 1000 ppm

2613 Carbon Monoxide in Air CO, 18.1 H mol/ mol (ppm)

2614 Carbon Monoxide in Air CO, 43.0 /jmol/ mol (ppm)

2619 Carbon Dioxide in N 2 CO,, 0.5 mol percent 2620 Carbon Dioxide in N, co2

. 1.0 mol percent 2621 Carbon Dioxide in N2 co2 , 1.5 mol percent 2622 Carbon Dioxide in N, co2 , 2.0 mol percent 2623 Carbon Dioxide in N 2 co2 , 2.5 mol percent 2624 Carbon Dioxide in N2 co2 . 3.0 mol percent 2625 Carbon Dioxide in N, co2 . 3.5 mol percent 2626 Carbon Dioxide in N2 co2 , 4.0 mol percent

41
Analyzed Liquids and Solids

These SRM's are intended for use in the analysis of materials for elements of interest in health or environmental problems. See also: Clinical SRM's page 39, and Industrial Hygiene SRM's page 44.

SINGLE ELEMENT Concentrations:

Weight percent — boldface

Microgram per gram — light face Nanogram per milliliter — italics

SRM Type Unit Size Lead Sulfur Mercury

1579 Powdered Lead Base Paint 35 g 11.87% —

1620 Sulfur in Residual Fuel Oil IN PREP

1621 Sulfur in Residual Fuel Oil 100 mL 1.05%

1622a Sulfur in Residual Fuel Oil IN PREP

1623a Sulfur in Residual Fuel Oil IN PREP —

1624 Sulfur in Distillate Fuel Oil 100 mL .211%

1630 Trace Mercury in Coal 50 g 0.13 /ig/g 1641a Mercury in Water (,ug/ mL) IN PREP

1642a Mercury in Water (ng/mL) 950 mL HO ng mL

Element Nominal Vol/ Unit SRM Type

Certified Concentration (mL)

1636 Lead in Reference Fuel Pb 12, 20, 28 and 773 yug/g* 3 vials each

1637 Lead in Reference Fuel Pb 12, 20, and 28 ^g/g* 4 vials each

1638 Lead in Reference Fuel Pb 773 M g/g* 12 vials

^Equivalent grams per gallon are: 0.03, 0.05, 0.07, and 2.0 g/gal, respectively.

MULTI-ELEMENT Concentrations:

Weight percent — boldface

Microgram per gram — light face Nanogram per gram — italics

SRM Type Unit Size Al As Be

1632a Trace Elements in Coal (Bituminous) 75 g (1.64%) 9.3 1633a Trace Elements in Coal Fly Ash . IN PREP

1634 100 mL (0.095) (<0.01)

1635 Trace Elements in Coal (Subbituminous) 75 g

.42 1643a Trace Elements in Water (ng/g). . IN PREP

1645 River Sediment 70 g 1646 IN PREP

1648 1 Irban Particulate 2 g

115

SRM Cd Cr Co Cu Fe Pb Mn

1632a 0.17 34.4 (6.8) 16.5 11100 12.4 28 1633a

1634 (.01) (0.09) 13.5 0.04

(0.12) 1635 .03 2.5 (0.65) 3.6 2390 1.9 21.4 1643a

1645 10.2 2.96 109 11.3 714 785 1646

1648 75 403 609 3.91 0.655

42
SRM Hg Mo Ni Se Ag Sr S

1632a A 1 1 0.5 19.4 2.6 (1.64%)

1 0-*.'d

1 f\~KA 1 0.* £t1 ftflTW \ .UUiJ ) JO 2.14%

1 6jO 1.74 0.9 — — (0.33%)

1 HA 1~

I o4.ia — — —

1 04J 4j.8 1646

1648 82

SRM Tl Th U V Zn

1632a 4.5 1.28 44 28 1633a

1634 320 0.23 1635 0.62 0.24 5.2 4.7 1643a

1645 1.44 1.62 1.11 23.5 1720 1646

1648 5.5 4760

Permeation Tubes

These S RM's are intended for calibrating air pollution monitoring apparatus, and may be used to verify air pollution analytical methods and procedures. Each tube is individually certified.

Sulfur Dioxide

Sulfur dioxide permeation tubes are available in three lengths—2, 5, and 10 centimeters. The permeation

rates are certified over the temperature range of 20 to 30° C. The following table is provided as a guide in the

selection of the appropriate length. The values in the table do not represent certified values for any SRM. The

concentrations of S02 in ppm are based on an approximate permeation rate of 0.28 micrograms per centimeter per minute at 25°C, for flow rates of 1, 5, and 10 liters per minute.

SRM Type

Tube Length

(cm) Permeation Rate (Mg/min)

Typical Concentrations (ppm) Flow Rates (liters per minute)

1625 Sulfur Dioxide Permeation Tube 10 2.8 1.07 0.214 0.107 1626 Sulfur Dioxide Permeation Tube 5 1.4 0.535 .107 .0535 1627 Sulfur Dioxide Permeation Tube 2 0.56 .214 .0428 .0214

Nitrogen Dioxide

Nitrogen dioxide permeation device (SRM 1629) is calibrated at 25.0°C only. The temperature coefficient given with each tube provides the means to calculate permeation rates at other temperatures near 25° C. The

permeation rates for these tubes are between 0.5 and 1.5 /ug/ min at 25° C. A tube with a rate of 1 .0 /dg/m'm, in an

air-flow of one liter per minute at 25° C, will produce a concentration of 0.5 ppm of N02

.

43
Industrial Hygiene Standards

Organic Solvents on Charcoal

These SRM's consist of charcoal tubes to which have been added known quantities of the specified organic

solvent. Each SRM consists of eight tubes, two each of four solvent levels (except 2661a). SRM 2661a consists of nine tubes, three each of three solvent levels. Each tube is color coded for both the solvent and the solvent

level.

SRM Solvent Solvent Color Code

1 (red)II (blue)III (green)IV

(black)

2661a Benzene red 16* 30* 54* 2662 m-Xylene blue 0.040 0.293 1.79 8.38 2663 p-Dioxane green .016 .112 0.996 6.49 2664 1 ,2-Dichloroethane white .098 .381 1.56 5.80 2665 Chloroform yellow .147 .516 2.14 6.87 2666 Trichloroethylene black .286 1.03 4.09 15.4 2667 Carbon Tetrachloride gold .033 0.1 14 0.414 1.58

Solvent level, mg per tube

(Solvent Level Color Code)

N /jg per tube

Freeze-Dried Urine

These SRM's consist of two bottles of freeze-dried human urine, one containing a low and one an elevated

level of the element certified.

SRM Element Low Level* Elevated Level* (mg/L) (mg/L)

2671 Fluorine (F~) 0.835 7.14 2672 Mercury 0.0042 0.294

*When reconstituted with 50 mL water.

Materials on Filter Media

These SRM's consist of potentially hazardous materials deposited on filters to be used to determine the

levels of these materials in industrial atmosphere.

SRM Type Material Certified Quantity Certified

(/ug/ filter)

1 II 111 IV

2675 Beryllium on Filter Media Beryllium 0.052 0.26 1.00 2676a Metals on Filter Media Cadmium 1.02 2.50 10.18 Lead 6.96 15.23 29.64 Manganese 1.97 9.89 19.70 Zinc 9.86 49.52 99.22 2679 Quartz on Filter Media Quartz 3.8 29.9 76.1 193.2 Clay (400) (370) (320) (200)

44
Forensic Standards

These SRM's are intended for use in the calibration of apparatus and the evaluation of methods used in the analysis of materials of interest to law enforcement agencies. (For details on SRM 1 820, see Refractive Index

Standards, page 67.)

SRM Type Certification Unit of Issue

1820 Glass, Borosilicate Refractive Index 2 slabs; one polished, one unpo ished 1822 Glass, Window (Soda-Lime) Refractive Index 2 slabs; one polished, one unpo ished 1823 Silicone liquids —I & 1! Refractive Index Set of 2 : 60 ml. each

Hydrocarbon Blends

Four standard hydrocarbon blends are available for calibration of mass spectrometers and gas chromatographic procedures used in the analysis of gasolines, naphthas, and blending stocks. The even numbered SRM

596 is a virgin naphtha and the odd numbered SRM's 593, 597, and 599, are representative of typical catalytically cracked naphthas in the C7 and Cs paraffin and cycloparaffin series. Each SRM is supplied in a unit of ten sealed ampoules. Each ampoule contains 0.03 mL of the blend. Each

ampoule is intended to provide material for only one calibration analysis so that possible fractionation of

components will be avoided.

For individual components present in the mixtures in the amount of 10% or less (by volume), the limits of

error in composition are not greater than ±0.01 percent and for components present in more than 10 percent,

the limits of error are not greater than ±0.10 percent.

SRM 593 596 597 599

Blend No. 2 5 6 8

Unit (Ampoules) 10 10 10 10

Hydrocarbon Volume Percent (Nominal)

17 25

30

20

8 57 32

9 14 4 3 14 30

16 21 177

1914

204

6

13

45
Metallo-Organic Compounds

These SRM's are intended for the preparation of solutions in oils of known and reproducible concentrations of metals. Because "matrix" effects occur, it is desirable to prepare the standard solutions in oil identical or

similar to the oil being studied. Possession of an adequate collection of these metallo-organic SRM's permits the preparation of any desired blend of known concentrations of metal in the appropriate lubricating oil. They are used primarily for the calibration of spectrochemical equipment used in the determination of metals in lubricating oil. This technique is used extensively in the defense program, the transportation industry, and other

industries where the consequences of failure of a moving metal part may range from inconvenient to catastrophic.

The Certificate supplied with each SRM gives the percentage of the element of interest and directions for preparing a solution of known concentration in lubricating oil.

Constituent Certified

SRM Element (wt. percent) Wt/ Unit Type

1075a Al 8.07 5 Aluminum 2-ethylhexanoate 1051b Ba 28.7 5 Barium cyclohexanebutyrate

1063a B 2.4 5 \AIVICllLIlVl pntnvl hnratp UUI dlC 1053a Cd 24.8 5 VaUlIllUUI LyLUJIlCAdllCUUiyi alC 1074a Ca 12.5 5 Ipi

im ^-pt hvl hp v n n r\^\ tp

1078b Cr 9.6 5 Tris( 1 -phenyl- 1 ,3-butanediono)chromium (111) 1055b Co 14.8 5 Cobalt cyclohexanebutyrate

1080a Cu 16.37 5 Bis (l-phenyl-l,3-butanediono) copper (11) 1079b Fe 10.45 5 Tris ( l-phenyl-l,3-butanediono) iron (III) 1059b Pb 36.65 5 Lead cyclohexanebutyrate

1060a Li 4.1 5 Lithium cyclohexanebutyrate

1061c Mg 6.45 5 Magnesium cyclohexanebutyrate 1062b Mn 13.2 5 Manganous cyclohexanebutyrate

1064 Hg 36.2 5 Mercuric cyclohexanebutyrate 1065b Ni 13.89 5 Nickel cyclohexanebutyrate

1071b P 9.48 5 Triphenyl phosphate

1066a Si 14.14 5 Octaphenylcyclotetrasiloxane

1076 K 10.1 5 Potassium erucate 1077a Ag 42.60 5 Silver 2-ethylhexanoate 1069b Na 12.0 5 Sodium cyclohexanebutyrate

1070a Sr 20.7 5 Strontium cyclohexanebutyrate 1057b Sn 22.95 5 Dibutyltin bis (2-ethylhexanoate) 1052b V 13.01 5 Bis ( l-phenyl-l,3-butanediono) oxovanadium (IV) 1073b Zn 16.66 5 Zinc cyclohexanebutyrate

Fertilizer Standards

These SRM's are intended for use in the fertilizer industry as working standards for the determination of

the certified constituents.

Certified Composition

(Wt percent)

SRM Type

Wt/Unit

(grams)

N P K

193 Potassium Nitrate 90 13.85 38.66

194 Ammonium Dihydrogen Phosphate 90 12.15 29.92 200 Potassium Dihydrogen Phosphate 90 22.74 28.76

46
Ores

These SRM's are intended for use in checking the accuracy of assay methods. They are certified for their content of elements of economic interest, and occasionally, have additional data given for information only.

These SRM's are supplied in the form of fine powders, usually less than 0.15 mm.

Chemical Composition (Nominal Weight Percent)

SRM Type

Wt/Unit

(grams)

CaF LLO Cu Re Mo

79a Fluorspar 120 97.39

180 Fluorspar, high grade 120 98.8

181 Lithium (Spodumene) 45 6.4

' 182 Lithium (Petalite) 45 4.3 183 Lithium (Lepidolite) 45 4.1 330 100 0.84 0.3 ppm 0.018

331 Copper, milltails 100 .091 0.4 ppm .0022 332 Copper, concentrate 50 28.45 10.2 ppm .64 333 Molvbdenum. concentrate 55 1.038 0.087 55.3

Chemical Composition (Nominal Weight Percent)

SRM Type

Wt/Unit

(grams) ALO, BaO Cd CdO CaO CO,

27f Iron Ore. Sibley 100 0.82 0.039 690 Iron Ore, Canada (Cone.) 150 .18 .20 691 Iron Oxide, reduced IN PREP *

* 692 Iron Ore. Labrador 150 1.41 .023 693 Iron Ore, Nimba 150 1.02 .016 69b Bauxite. Arkansas 80 49.3 <0.01 .12 696 Bauxite, Surinam 80 54.7 .005 .01 697 Bauxite, Dominican 80 45.7 .009 .60 698 Bauxite, Jamaican 80 47.9 .007 .50 120b Phosphate Rock, Florida . . . 90 1.06 0.002 49.40 2.79 277 Tungsten Concentrate 100 Ta (0.20) Ca (0.37)

II 3a Zinc Concentrate 100 0.78 I.I, 329 Zinc Concentrate 100 .14 0.08

SRM Cu Cr203 F In Total Fe Fe: 0, Pb MgO MnO

27f 65.97 0.019 0.011 690 66.85 .18 .23 691 * * * 692 59.58 .035 .46 693 65.11 .013 .091

69b 0.010 7.1 <.01 .09 696 .045 8.7 .01 .003 697 .10 20.0 .17 .35 698 .078 19.6 .06 .29

1 20b 3.84 1.10 0.28 0.032 277 Nb (1.00) (7.4) (0.07) Mn (10.0) 113a 0.31 ND 2.08 2.80 .75 329 .13 2 0.019 I2.94 6.0h .16 5

*To be certified.

47
SRM P P;0, K,0 SiO, Ag Na,0 S SO, Ti02

27f 0.041 0.008 4.17 — 0.012 0.005 — 0.019 690 .01

.0030 3.71 — .003 .003 — .022 691 * * * 692 .039 .039 10.14 .008 .005 .045 693 .056 — .0028 3.87 - .0028 .005 — .035

69 b — 0.12 .80 13.4 — .030 — 0.63 2.0 696 — .06 .010 3.80 — .02 — .24 2.7 697 — .90 .07 6.80 — .046 — .15 2.6 698 — .35 .013 0.69 — .03 — .24 2.5 120b 34.5

. 12 4.70 .35 — — 1.5 277 (.03) Si (0.85) (.25) 02 (21.4) Ti (2.2)

1 13a (1.54) 0.0467 (30.6) 329 (0.61) .0089 (31.7)

SRM v,o5 WO, Zn ZnO Lose on

Ignition Moisture

27f 690

691 692

693

69 b 696

697

698

0.03

.07

.07

.07

0.003

.002

.04

.03

27.22

29.88

22.2

27.4

120b 277

1 13a 329

Mo (0.06) 67.4

57.3 45. 5

Sn (0.54) 0.08 45

Minerals, Refractories, Glasses, and Carbides

These SRM's are supplied in the form of powders, usually less than 0.15 mm. They are intended to provide materials for checking the accuracy of methods used in the analysis of similar materials, primarily in the

glass, ceramics, and steel industries.

Minerals

Chemical Composition

(Nominal Weight Percent as the Oxide)

SRM Type

Wt/Unit

(grams)

Si02 Fe2 0, A12 03 Ti02 MnO CaO

Ic Limestone, argillaceous* 50 6.84 0.55 1.30 0.07 0.025 50.3 88a Limestone, dolomitic 50 1.20 .28 0.19 .02 .03 30.1 70a Feldspar, potash 40 67.1 .075 17.9 .01 0.11 99a Feldspar, soda 40 65.2 .065 20.5 .007 2.14 97a Clay, Hint 60 43.7 .45 38.8 1.90 0.11

98a Clay, plastic 60 48.9 1.34 33.2 1.61 .31 81a Glass sand 75 0.082 0.66 0.12 165a Glass sand (low iron) 75 .012 .059 .01

154b Titanium dioxide 90 99.74

Information values only: S (0.1); S03 (0.1); F (0.009); and CI (0.004).

4X
SRM SrO MgO Cr,0, Na,0 K,0 Li,0 Zr02 BaO Rb,0 p 2 o5 CO, Loss on

Ignition

lc 0.030 0.42 — 0.02 0.28 — — 0.04 39.7 39.9 88a .010 21.3 — .01 .12 .01 46.6 46.7 70a 2.55 1 1.8 0.02 0.06 0.40 99a 0.02 6.2 5.2 .26 .02 .26 97a .18 .15 0.03 0.037 0.50 0.1 1 0.063 .078 — .36 13.32

98a .039 .42 .03 .082 1.04 .070 .042 .03 . 112.44 81a 46 uglg — .034 — — —

1 0Jd n 1 nolo) aha

154b

Refractories

Chemical Composition

(Nominal Weight Percent as the Oxide)

SRM Type Wt/Unit

(grams)

SiO: ALO, Fe2 0, FeO TiO, ZrO, MnO PA

76a Burnt Refractory (A1,0, ^40%) 75 54.9 38.7 1.60 2.0, (0.15) 0.12,, 77a Burnt Refractory (A1,0, -60%) 75 35.0 60.2 1.0„ 2.6„ ( .21) .092 78a Burnt Refractory (AUO, -70%) 75 19.4 71.7 1.2 3.2, ( .31) 1.3 103a Chrome refractory 60 4.6 29.96 12.43 0.22 .01 CI 1 0.01 198 Silica refractory 45 0.16 0.66 .02 <.01 008 .022 199 Silica refractory 45 .48 .74 .06 .01 007 .015

SRM Cr2 0, CaO MgO Li,0 Na_,0 K,0 SrO Loss on

Ignition

76a 0.22 0.52 0.042 0.07 1.33 0.037 (0.34) 77a .05 .38 .02, .037 0.090 .009 (.22) 78a .11 .70 .12 .078 1.22 .25 (.42) 103a 32.06 .69 18.54

198 2.71 0.07 .001 .012 0.017 .21 199 2.41 .13 .002 .015 .094 .17

Glasses

Chemical Composition (Nominal Weight Percent) SRM Type Unit Size Si02 PbO A1,0, Fe2 0, ZnO MnO TiO, ZrO,

89 Lead-Barium 45 g 65.35 17.50 0.18 0.049 0.088 0.01 0.005

91 Opal 45 g 67.53 0.097 6.01 .081 0.08 .008 .019 .0095 92 Low-Boron 45 g 93a High-Boron Wafers 32 mm D X 6 mm 80.8 2.3 .029 .012 .03 620 Soda-Lime, Flat 3 platelets 35 X 35 X 3 mm 72.1 1.8 .04 .02 621 Soda-Lime, Container .... 3 disks: 38 mm D X 5 mm 71.14 2.77 .040 .014 .009

SRM CaO BaO MgO K.,0 Na2 0 B2 03 p,o5 As2 Os As2 03 SO, CI F

Loss on

Ignition

89 0.21 1.40 0.03 8.40 5.70 0.23 0.36 0.03 0.03 0.05 0.32

91 10.48 .008 3.25 8.48 .022 .102 .091 .014 5.72 92 0.70 93a <0.02 <.01 0.01 4.0 12.6 620 7.1 3.7 .4 14.4 .06 .3 621 10.71 0.12 0.27 2.01 12.71 .03 .13

4^
Carbides

Type Wt/Unit

(grams)

Total Carbon

( Wt. %)

276a Tungsten Carbide 75 ~6. 13

Cements

These SRM's are furnished for x-ray spectroscopic analysis and for chemical analysis of cements

and related materials. Because these SRM's are hygroscopic, each unit consists of three sealed vials each containing approximately 5 g of material.

Chemical Composition (Nominal Weight Percent) SRM Type Wt/Unit

(grams)

CaO Si02 A1 2 0, Fe2 0, S03 MgO

633 Portland cement (red) 15 64.5,, 21.

g 3.78 4.20 2.2„ I.O4 634 Portland cement (gold) 15 62.58 20.73 5.2, 2.84 2.2, 3.30 635 Portland cement (blue) 15 59.8, 18.4, 6.2 2.61 7.07 l.23 636 Portland cement (vellow) 15 63.54 23.

2 3.0, 1.61 2.3, 3.95 637 Portland cement (pink) 15 66.04 23.0, 3.2, 1.80 2.38 0.67 638 Portland cement (green) 15 62.09 21A 4.4 5 3.55 2.34 3.83 639 Portland cement (clear) 15 65.7, 21.6, 4.2, 2.40 2.4S l-26

SRM K 2 0 TiOj Na2 0 SrO p2 o5 Mn,0, F ZnO Cr2 03 Loss on

Ignition

633 0.17 0.24 0.64 0.31 0.24 0.04 0.08 0.01 0.01 0.75 634 .42 .29 .15 .12 .10 .28 .08 .02 .08 1.62 635 .45 .32 .07 .21 .17 .09 .04 .01 .01 3.24 636 .59 .18 .11 .04 .08 .12 .06 .03 .01 1-U

637 .25 .21 .15 .09 .24 .06 .04 .01 .01 1.6, 638 .59 .25 .13 .07 .06 .05 .04 .10 .01 0.95 639 .06 .32 .65 .15 .08 .08 .02 .01 .01 1.0„

Trace Element Standards

The SRM's listed below were designed for trace chemical analysis, specifically for calibrating instruments

and checking analytical techniques and procedures used to determine trace elements in various inorganic

matrices. In addition many SRM's certified for chemical composition have one or more constituents certified at or below the 100 jug/g level. Some SRM's in the following categories may be of use in trace analytical work:

Steels (pages 14-17); High Purity Metals (page 36); Non ferrous alloys (pages 25-30); Environmental Standards

(page 41); and Biological Standards (page 39).

50
SRM Type-Matrix Size Unit of Issue

607 Trace Elements in Feldspar 5 gram

608 Trace Elements in Glass, Set Wafers 3 mm thick Set: 2 each 614 and 616

609 Trace Elements in Glass, Set Wafers 1 mm thick Set: 2 each 615 and 617

610 Trace Elements in Glass, 500 ppm Wafers 3 mm thick 6 Wafers

61

Trace Elements in Glass, 500 ppm Wafers 1 mm thick 6 Wafers

612 Trace Elements in Glass, 50 ppm Wafers 3 mm thick 6 Wafers

613 Trace Elements in Glass, 50 ppm Wafers 1 mm thick 6 Wafers

614 Trace Elements in Glass, 1 ppm Wafers 3 mm thick 6 Wafers

615 Trace Elements in Glass, 1 ppm Wafers 1 mm thick 6 Wafers

616 Trace Elements in Glass, 0.02 ppm Wafers 3 mm thick 6 Wafers

617 Trace Elements in Glass, 0.02 ppm Wafers 1 mm thick 6 Wafers

618 Trace Elements in Glass, Set Wafers 3 mm thick Set: 1 each 610, 612, 614 and 616 619 Trace Elements in Glass, Set Wafers 1 mm thick Set: 1 each 611, 613, 615 and 617 NOTE: Glass—Nominal Composition: 72% SiQ2 , 12% CaO, 14% Na,Q, and 2% A12 Q3

.

Trace Element Standards (Nominal Concentrations)

Element

607 610-611 612-613 614-615 616-617 (ppm) (ppm) (ppm) (ppm) (ppm)

Antimony — — — ( 1 .06) (0.078) Barium (41) Boron (351) (32) (1.30) (0.20) Cadmium — (0.55) —

Cerium — — (39) — —

Chromium — (398.5) (37.8) (0.99) —

Cobalt — (390) (35.5) 0.71 —

Copper — (444) (37.7) 1.34 (0.65) Dysprosium — — (35) — —

Erbium — — (39) — —

Europium — — (36) (0.99) —

Gadolinium (39) Gallium (1.3) (0.23) Gold — (25) (5) (0.5) (0.18)

(0.75) (0.26)

Iron 458 51 13.5 (11)

(36) (0.83) (0.034) Lead 426 38.57 2.32 1.85 Manganese 485 (39.6) (1.41) 0.62

(422.6) (36.94) (0.79)

(36) 458.7 38.8 (0.95) Potassium (461) (64) 30 29

(49.43) (6.67) (0.17) (0.004) 523.90 425.7 31.4 0.855 0.0998

(39)

(0.59) (0.026) (254) 22.0 0.42 65.485 515.5 78.4 45.8 41.72

(61.8) 15.7 0.269 (0.0082)

(447) (44) (0.74) (0.025) 457.2 37.79 0.748 0.0252

(437) (50.1) (3.1) (2.5) 461.5 37.38 0.823 0.0721

(42) Zinc (433) (2.43)

In addition to the 36 elements listed above, the Glass SRM s contain the following 25 elements: As. Be, Bi, Cs, CI, F Ge, Hf, Hg, Li, Lu. Mg, Nb, P, Pr, Se, S, Te, Tb, Tm, Sn, W, V, Y, and Zr.

51
Nuclear Materials

Special Nuclear Materials

These SRM's are available to DOE contractors, NRC or State Licensees, and foreign governments that have entered an Agreement for Cooperation with the U.S. Government concerning the Civil Uses of Atomic

Energy. The purchase request for these SRM's must be made on special forms obtainable from the Office of

Standard Reference Materials, Room B311, Chemistry Building, National Bureau of Standards, Washington,

D.C. 20234.

Plutonium Assay Standards

SRM Type Certified for Wt/Unit

(grams)

Purity (%)

944 Plutonium sulfate tetrahydrate Plutonium Content 0.5 47.50* 945 Plutonium metal, standard matrix Impurities 5 (99.9) 949e Plutonium metal assay Plutonium Content 0.5| 99.996 955 Plutonium—244 Spike IN PREP

*Stoichiometric f Nominal weight (Values in parentheses are not certified, hut are given for information only.) Plutonium Isotopic Standards

SRM Type

Wt/ Units (grams)

2 "<PU 219 Pu

Atom Percer

240 pu

it

- JI Pu 242pu

946

947

948

Plutonium Sulfate Tetrahydrate Plutonium Sulfate Tetrahydrate Plutonium Sulfate Tetrahydrate

0.25

.25

.25

0.247

.296

.011

83.128 75.696 91.574

12.069

18.288 7.914

3.991 4.540

0.468

0.565

1.180 0.0330

Uranium Assay Standards

SRM Type Certified For Wt/Unit

(grams)

Purity

(%)

950b Uranium Oxide Uranium Oxide 25 99.968 (U 3 08 ) 960 Uranium Metal Uranium 26 99.975 (U)

993 Uranium—235 Spike (solution) Uranium 15 99.8195 (U-235)

Uranium Isotopic Standards

SRM Uranium Oxide (U,08 ) Wt

(grams)

234 U

Atom F

2.15 u

ercent

236U 23«U

U-0002 Depleted 1.0 0.00016 0.01755 <0.0000l 99.9823 U-005 Depleted 1.0 .00218 .4895 .0046 99.504 U-010 Enriched 1.0 .00541 1 .0037 .00681 98.984 U-015 1.0 .00850 1.5323 .0164 98.443 U-020 Enriched 1.0 .0125 2.038 .0165 97.933

U-030 Enriched 1.0 .0190 3.046 .0204 96.915 U-050 Enriched 1.0 .0279 5.010 .0480 94.915 U-100 1.0 .0676 10.190 .0379 89.704 U-150 Enriched 1.0 .0993 15.307 .0660 84.528 U-200 Enriched 1.0 .1246 20.013 .2116 79.651

U-350 Enriched 1.0 .2498 35.190 .1673 64.393 U-500 Enriched 1.0 .5181 49.696 .0755 49.71

U-750 1.0 .5923 75.357 .2499 23.801 U-800 Enriched 1.0 .6563 80.279 .2445 18.820 U-850 Enriched 1.0 .6437 85.137 .3704 13.848

U-900 Enriched 1.0 .7777 90.196 .3327 8.693 U-930 1.0 1.0812 93.336 .2027 5.380 U-970 1.0 1 .6653 97.663 .1491 0.5229

52
Neutron Density Standard

This SRM is provided as a reference source of a cobalt-in-aluminum alloy to serve as a neutron density

monitor wire SRM. Accurate determination of thermal neutron densities is essential in irradiation tests to obtain a

basis for comparison of densities among reactors, in applying data in the design of reactors, in understanding the mechanisms of radiation damage, and for use in neutron activation analysis. The wire is 0.5 mm in diameter and 1 meter long.

SRM Type

Cobalt Content

(Weight percent)

953 Neutron density monitor wire (Co in Al) 0.116

Fission Track Glass Standards

These SRM's, at four uranium concentration levels, will aid fission track laboratories in interlaboratory

comparisons of data and in monitoring neutron flux for irradiations. The fission track glass standards are

certified for the neutron flux (n - cm-2 -sec" 1 ) that induced uranium fission in selected wafers. The materials were

irradiated in the NBS 10 Megawatt Research Reactor, at two different neutron energies.

Each SRM unit contains four unirradiated glass wafers and two irradiated wafers.

SRM Total U concentration ppm (by weight)

235 U atom percent

Irradiation time (sec.)

961 461.5 0.2376 RT-3 8 RT-4 12 962 37.38 0.2392 RT-3 8 RT-4 12 963 0.823 0.2792 RT-3 80 RT-4 120 964 0.0721 0.616 RT-3 360 RT-4 540

Isotopic Reference Standards

The isotopic composition of these SRM's has been determined by mass spectrometry, by comparison with

mixtures prepared from high-purity separated isotopes: They are useful for those looking for small variations in the isotopic composition of the elements, and for the evaluation of mass discrimination effects encountered in the operation of mass spectrometers.

SRM Isotopic Reference Standards Element Certified Wt/Unit

(grams)

951 Boron 1.0 952 Boric Acid, 95% Enriched 10 B Boron 100 975 Chlorine 0.25 976 Copper .25 977 Bromine .25

978 Silver .25 979 Chromium .25 980 Magnesium .25 *981 Lead 1.0 *982 Lead Metal, Equal Atom (206/208) Lead 1.0

*983 Lead Metal, Radiogenic (92%-206) Lead 1.0 984 Rubidium Chloride, assay and isotopic Rubidium 0.25 987 Strontium Carbonate, assay and isotopic Strontium .25 989 Rhenium pkg. (50) 990 Silicon wafer, 3 cm D

X 0.2 cm

991 Lead-206 Spike, assay and isotopic Lead 15 **993 Uranium-235 Spike, assay and isotopic (Solution) Uranium 15

*Sold as a set only of three 981, 982, and 983. **Special Nuclear forms required.

53
CERTIFIED PHYSICAL PROPERTIES STANDARDS

Ion Activity Standards

These SRM's are intended for use in the preparation of solutions for the calibration of specification

electrodes. This includes the pH and pD measuring systems.

pH Standards

These SRM's are furnished as crystals for the preparation of solutions of known hydrogen ion concentration for calibrating and checking the performance of commercially available pH materials and

instruments. They are furnished with certificates giving directions for preparation of the solutions and

tables of pH values at various temperatures.

SRM's 1861c and 18611c, 191 and 192, and 922 and 923, are certified for use in admixture only. At an

equimolar (0.025 molal) mixture of SRM's 1861c and 18611c, a pH(S) of 6.863 at 25 °C is obtained. Directions also are furnished for the preparation of a physiological reference solution from 1861c and 18611c having a pH(S) of 7.415 at 25 °C.

SRM Type

Wt/Unit

(grams)

185e

1861c 18611c 187b

188

189

191 192 922

923

Potassium acid phthalate Potassium dihydrogen phosphate "i Disodium hydrogen phosphate J Borax

Potassium hydrogen tartrate

Potassium tetroxalate Sodium bicarbonate! Sodium carbonate J

Tris( hydroxy methyl) aminomethane \

Tris( hydroxy methyl )aminomethane hydrochloride/

60

30

30

3060

6530

30

25

35

pD Standards

These SRM's are furnished as crystals for preparation of solutions of known deuterium-ion concentration for the calibration and correction of pH indicating equipment to indicate pD data. SRM's 21861 and

2 1 86 1 1 , and 2191 and 2192, are certified for use in admixtures only.

SRM Type pD(S)

Values Wt/Unit

(grams)

21861

218611

2191

Potassium dihydrogen phosphate!

Disodium hydrogen phosphate /

Sodium bicarbonate!

7.43

10.74

30

3030 2192 Sodium carbonate / 30

Ion-Selective Electrodes

These SRM's are certified for the calibration of ion-selective electrodes and have conventional ionic

activities based on the Stokes-Robinson hydration theory for ionic strengths greater than 0.1 mole per liter.

SRM Type Certified Property Wt/Unit

(grams)

2201 Sodium Chloride pNa, pCl 125 2202 Potassium Chloride pK, pCl 160 2203 Potassium Fluoride PF 125

54
Mechanical and Metrology Standards

Magnification Standard

This SRM is designed for calibrating the magnification scale of a scanning electron microscope (SEM)

from 1 KX to 20 KX. Each specimen is issued with a certificate of calibration for spacings of 1. 2. 3. 5 and 50

yum to an accuracy of 5 percent or better. The specimen is a metallographic cross-section of alternate layers of electrodeposited gold and nickel,

encapsulated in copper-filled epoxy. and mounted within a section of stainless steel tubing 1 1 mm O.D. X 6.5 mm high. An outline of the recommended procedures for the use of this SRM in an SEM. as well as a photomicrograph that shows the calibrated area, is included with each SRM. If the surface of this SRM were

etched by dc sputtering, the SRM would be useful for calibrating optical instruments.

SRM Type Unit of Issue

484a SEM Magnification Standard ... 1 each

Coating Thickness Standards

These SRM's have a specimen size of 3 X 3 cm and are for calibrating coating thickness gages of the magnetic type for the measurement of thickness of nonmagnetic coatings on steel, nickel on steel, or nickel on

nonmagnetic substrates. The steel substrates have the magnetic properties of AISI 1010 steel and the nickel coatings have the magnetic properties of an annealed. Watts nickel electrodeposit free of cobalt and iron. The magnetic type thickness gages are often used to measure the thickness of paint and other organic

coatings on steel, as well as zinc (galvanized) and other nonmagnetic metallic coatings. The number of different thicknesses required for these calibrations depends on the type of gage and the coating thicknesses to be

measured.

The magnetic type thickness gages can be used to estimate magnetic properties of austenitic stainless steel weld metal. Because the magnetic properties of the weld metal are closely related to the ferrite content of the weld, these instruments are used to estimate the ferrite content. For these measurements, the coating thickness

SRM 1370a is used to calibrate the instrument. The ferrite contents having magnetic properties similar to those

of the various coating thickness SRM's have been established by other laboratories.

SRM's with gold and tin coatings on various substrates have a specimen size of 15 X 15 mm and are for

calibrating coating thickness gages of the beta-backscatter type and for calibrating x-ray fluorescence methods

for the measurement of the weight per unit area of gold or tin coatings.

The gold coating standards were measured by beta-ray backscatter and x-ray fluorescence techniques

relative to NBS gold coating materials for which the average weights per unit area were determined by weight

and area measurements. They are suitable for the direct calibration of equipment used to measure weight per

unit area of gold coating of equivalent purity. From the density and weight per unit area, the instruments can be

calibrated in terms of the thickness of the standard.

For the tin coating standards, x-ray fluorescence techniques were used to measure the thickness of the tin coating relative to NBS tin coating material for which the average weights per unit area were determined by

weight and area measurements.

ASTM Methods of Measuring Coating Thickness

Instrumental methods of measuring coating thickness are set forth in the following ASTM Methods of

Test: B244 Measuring Thickness of Anodic Coatings on Aluminum with Eddy-Current Instruments. B487 Measurement of Metal and Oxide Coating Thicknesses by Microscopical Examination of a Cross Section.

B499 Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on

Magnetic Basis Metals.

B504 Measuring the Thicknesses of Metallic Coatings by the Coulometric Method.

B530 Measurement of Coating Thicknesses by the Magnetic Method: Electrodeposited Nickel

Coatings on Magnetic and Nonmagnetic Substrates.

55
B567 Measurement of Coating Thickness by the Beta Backscatter Method.

B568 Measurement of Coating Thickness by X-Ray Spectrometry.

E376 Recommended Practice for Measuring Coatings on Thickness by Magnetic-Field or EddyCurrent (electro-magnetic) Test Methods.

Dl 186 Measurement of Dry Film Thickness of Nonmagnetic Organic Coatings Applied on a Magnetic

Base. D1400 Measurement of Dry Film Thickness of Nonmetallic Coatings of Paint, Varnish, Lacquer, and

Related Products Applied on a Nonmagnetic Metal Base. G12 Nondestructive Measurement of Film Thickness of Pipeline Coatings on Steel.

Nonmagnetic Coating on Magnetic Substrate (Copper and Chromium on Steel)

Nominal Coating Thickness SRM Unit Size micrometer milliinch

(mil)

1301a Set of 4 z.. j 1302a Set of 4 24 1303a Set of 4 12 .5 1304a Set of 4 20 .8

1 305a Set of 4 25 1 0 1306a Set of 4 40 1 6 1307a Set of 4 50 2.0 1308a Set of 4 65 2.6 1310a Set of 4 80 3.1

1311a Set of 4 140 5.5 1312a Set of 4 200 7.9

1 3 1 3a Set of 4 250 9.8 1314a Set of 4 400 16

1351a Set of 4: 2 each 50 7 n

1 A(\ 1 J.J

1361a Set of 4 6 0.24

1 L

1

1 ,\j0

JU

1362a Set of 4

AC\ 1 .0 «n5U 1 l J>. 1

1 AC\ 1 "4U 200 7.9

1363a Set of 4 250 9.8 400 16 500 20 650 26

1364a Set of 4 820 32

1000 39 1500 59 2000 79

1370a Set of 8 200 7.9 250 9.8 400 16 500 20 650 26 820 32 . 1000 39

1500 59

56
Magnetic Coating on Magnetic Substrate (Nickel on Steel)

Nominal Coating Thickness SRM Unit Size micrometer milliinch

(mil)

1352a Setof4:2each 9 0.35 20 .8

1353a Set of4:2each 25 1.0 60 2.4

1365a Set of 4: 1 each 3 0.1 9 .4 15 .6 20 .8

1366a Set of 4: 1 each 25 1.0 35 1.4 40 1.6 50 2.0

Magnetic Coating on Non-Magnetic Substrate (Nickel and Chromium on Brass)

Nominal Coating Thickness

SRM Unit Size micrometer milliinch

(mil)

1367a Set of 4: 1 each 3 0.12

9 .35 16 .6 25 1.0

Gold Coating on Glass Sealing Alloy — ASTM Designation F15; Fe-53, Ni-29, and Co- 17

Unit Nominal Coating Nominal Coating Thickness SRM Size Weight (mg/cm2

) micrometer microinch

1398a Set of 4: 1.5 0.8 30

1 each 3.0 1.5 60

6.0 3 120

14.0 7 280 Gold Coating on Nickel

Unit Nominal Coating Nominal Coating Thickness SRM Size Weight (mg/cm2

) micrometer microinch

1384a Set of 4: 1.5 0.8 30

2 each 3.0 1.5 60

1399a Set of 4: 1.5 0.8 30

1 each 3.0 1.5 60

6.0 3 120

17.0 9 350

Gold Coating on Copper-Clad, Glass-Epoxy Laminate

Unit Nominal Coating Nominal Coating Thickness SRM Size Weight (mg/cm2

) micrometer microinch

2308a Set of 4: 1.5 0.8 30

1 each 3.0 1.5 60

6.0 3 120

14.0 7 280

57
Gold Coating on Copper

Unit Nominal Coating Nominal Coating Thickness SRM Size Weight (rag/cm2) micrometer microinch

2318a Set of 4: 1.5 0.8 30

1 each 3.0 1 .5 60

6.0 3 120

14.0 7 280

ig on Steel

Unit Nominal Coating Nominal Coating Thickness SRM Size Weight (mg/cm2

) micrometer microinch

2338a Set of 4: 2.0 2.8 110

2 each 12.0 16.5 650

2339a Set of 4: 1.1 1.5 60

1 each 3.0 4.1 160

5.0 7 280

14.0 19 750

Glass Standards

SRM Type Unit of

Issue

622

623 624

708

709

710

711 712

713 714

715

716

717

Soda-lime-silica

Borosilicate

Lead-silica, for dc resistivity Lead-silica glass A

Borosilicate glass B

Extra dense lead Soda-lime silica glass-type 523/586

Lead-silica glass-type 617/366

Mixed alkali lead silicate glass, 1/4 in patties (6 pes.) Dense barium crown 620/603 glass, 1 3/8 in diam X 5/8 in thick gobs (4 pes Alkaline earth alumina silicate glass, 1/4 in diam cane (16 pes—6 in long) . . .

Alkali-free aluminosilicate glass, 1/4 in diam cane (13 pes—6 in long) Neutral (borosilicate) glass, 1/2 in diam cane (6 pes—6 in long)

Borosilicate glass, 4.2 cm X 4.2 cm X 12.5 cm bar

2.2 kg

2.2 kg

200 g 625 g 275 g

500 g

2 lb

3 lb 0.5 lb

.5 lb

.5 lb

200 g 250 g

500 g

Chemical Resistance (Durability) of Glass

These SRM's are certified for use in checking test methods and for calibrating equipment used to determine the resistance of glass containers to chemical attack. The values given in the table represent the volume of fiftieth-normal sulfuric acid used to titrate to the methyl-red end point the alkaline extract from a crushed sample of glass after exposure to high-purity water at 121 °C.

SRM Type mL of N/50 H2 S04

622 Soda-lime-silica 7.67 623 Borosilicate 0.34

Electrical Volume Resistivity

This SRM is certified for use in checking test methods and for calibrating equipment used to deter- mine the dc volume resistivity of glass in accordance with ASTM C 657-72.

SRM Type Log,,, Electrical Volume Resistivity Temperature, °C

624 1 cad-silica 1 1.07 il • cm 250

9.88 il cm 300

8.88 H • cm 350

58
Glass Viscosity Standards

SRM's 710, 711, and 717 are furnished as rectangular-shaped bars, and are certified for viscosity

between values of 102 and 10 12 poises. They are furnished to check the performance of high-temperature

viscosity equipment (rotating cylinders) and low-temperature viscosity equipment (fiber elongation,

beam-bending, parallel-plates, etc.)

Temperature (°C) at Viscosity (poises)

SRM 10- 103 10J 105 106 107 10" 10* 10 10 10" \0> 2

710 1434.3 1181.7 1019.0 905.3 821.5 757.1 706.1 664.7 630.4 601.5 576.9

711 1327.1 1072.8 909.0 794.7 710.4 645.6 594.3 552.7 518.2 489.2 464.5 717 1545.1 1248.8 1059.4 927.9 831.2 757.1 698.6 651.1 611.9 579.0 550.9

Glass Viscosity Fixpoints

Softening Annealing Strain SRM Type of Glass Point Point Point °C °C °C

709 Extra Dense Lead 384 328 311 710 Soda Lime-Silica 724 546 504

71 1 Lead-Silica 602 432 392

712 Alkali Lead Silicate 528 386 352

713 Dense Barium Crown 738 631 599 714 Alkaline Earth Alumina Silicate 908 710 662

715 Alkali-Free Aluminosilicate 961 764 714

716 Neutral 794 574 530 717 Borosilicate 720 516 471

Relative Stress Optical Coefficient

Three glasses have been certified for relative stress optical coefficient. These glasses will be used to check calibrations of instruments to measure this property, especially by the methods of test proposed by ASTM

C770-73T. The glasses are in rectangular-shaped bars.

SRM Type of Glass

Relative Stress Optical Coefficient at k — 546.1 nm

708 Lead-Silica Glass A C = 2.857 Brewsters, 10- I2 m2 /N

Borosilicate .... Glass B C = 3.652 Brewsters. 10- I2 m2 /N

709 Extra Dense Lead C = -1.359 Brewsters, lO-^m^N

Elasticity Standards

This SRM is polycrystalline alumina prepared from a single block of material by isostatically cold

pressing and then sintering alumina powder containing 0. 1 percent magnesium oxide. It is intended for the

calibration of apparatus used in the measurement of resonance frequencies from which elastic moduli are

calculated. Each bar has been individually measured and calibrated, and all surfaces were machined flat and parallel.

SRM Type Size

718 Polycrystalline Alumina I2.7X 1.27X0.32cm

59
Density Standards

SRM's 211c and 217c are certified for density (air saturated at 1 atm) at 20, 25, and 30 °C; and may

be used to calibrate pycnometers and density balances. [See also, Refractive Index, page 67, and Combustion

Calorimetric Standards, page 62.]

SRM Type Density 20 °C

(g/mLj Amount, mL

211c

217c-5 217c-25

Toluene 0.867

0.692

0.692

IN PREP

IN PREP

IN PREP

2,2,4, Trimethylpentane

2,2,4, Trimethylpentane

Polymer Standards

These materials are certified for the properties indicated in the table, such as weight and number average molecular weight, molecular weight distribution, limiting viscosity numbers (intrinsic viscosities) in several

solvents, density, and melt flow. These SRM's have wide application not only in the calibration of instruments used in polymer

characterization, such as light scattering photometers, osmometers, gel permeation chromatographs, but also wherever a well characterized polymer material is needed, as for example in studies of dilute solution behavior,

rheology, and polymer crystal physics.

SRM 1475 is accompanied by a series of papers, reprinted from the Journal of Research of the National

Bureau of Standards, which describe how the measurements were obtained.

SRM Type

Wt/Unit

(grams)

705 706

1475 1476

1482

1483 1484

Polystyrene, narrow molecular weight distribution, Mw = 179,000, Mw / Mn = 1.07 Polystyrene, broad molecular weight distribution, Mw = 258,000, Mw /M n =2.1

Polyethylene, linear, Mw = 52,000, Mw / Mn = 2.9 Polyethylene, branched

Polyethylene, linear, Mw = 13,600 Polyethylene, linear, Mw « 32,100

Polyethylene, linear, M w = 119,600

518 50

50

2

52

The following table lists the properties (and method) certified for these SRM's.

Property (and method) 705 706 1475 1476 148: 1483 1484

Molecular Weight

Weight Average

Number Average

Molecular Weight Distribution Limiting Viscosity Number

Benzene 25° C

Benzene 35° C

Cyclohexane 35°C

1-Chloronaphthalene 130°C. .

1,2,4-trichlorobenzene 130°C . . Decahydronaphthalene 130°C . Melt Flow

Density Heat Capacity

(Light Scattering)

(Sedimentation Equilibrium)

(Gel Permeation Chromatography-GPC)

(Osmometry)

(GPC)

(GPC)

(Capillary Viscometer)

(ASTM)

(ASTM)

(Adiabatic)

Rheology Standard

This SRM is intended for the calibration and checking of instruments used in polymer technology and

science for the determination of rheological properties of polymer melts or solutions. It is certified for Rate of

Shear, Viscosity, and First Normal Stress Difference at 25° C. SRM Type Unit Size

1490 Polyisobutylene Solution in Cetane 250 mL

60
Heat Standards

These SRM's are intended to relate heat and temperature measurements made in industrial, university,

and government laboratories with the International Practical Temperature Scale-1968. 1

Superconductive Thermometric Fixed Point Devices

Each device is composed of five small cylinders of high purity material mounted in a threaded copper stud

and enclosed by a mutual inductance coil set. They should prove particularly valuable to users of 3 He-4 He

dilution refrigerators, in which direct calibrations on the liquid helium vapor pressure-temperature scales are

difficult, and to those who wish to determine the temperature reproducibility of physical phenomena or of

cryogenic equipment.

SRM Type Material Nominal Temperature

(K)

767 Superconductive Thermometric Fixed Point Device Lead 7.2 Indium 3.4 Aluminum 1.2 Zinc 0.8 Cadmium .5 768 Superconductive Thermometric Fixed Point Device (Low) Gold-Indium .205 Gold-Aluminum .157 Iridium .098 Beryllium .024 Tungsten .015

Freezing Point Standards

Defining Fixed Points—International Practical Temperature Scale

These SRM's are of such purity that they are suitable for defining fixed points for the International

Practical Temperature Scale of 1968. 1

SRM Type

Temperature

°C

Wt/Unit

(grams)

740

741 Zinc Tin

419.58 231.9681

350

350

Determined Reference Points

These SRM's are intended for use in calibration of thermometers, thermocouples, and other temperature

measuring devices. The temperatures certified are in accord with the International Practical Temperature Scale

of 1968. SRM Type

Temperature

°C

Wt/Unit

(grams)

42g Tin 231.967 350 43h 419.58* 350

44f 660.3 200 45d 1084.8 450

49c Lead 327.493 600

743 Mercury -38.841 680 *SRM 43h is less pure than SRM 740 and has a freezing point 0.001 °C lower.

Melting Point Standards

SRM Type

Temperature

°C

Wt/Unit

(grams)

742

1968 Alumina, 99.9+%

Gallium, 99.9999+%

2053

29.7723

10 25

'"International Practical Temperature Scale of 1968," Metrologia, 5, 35-44 (1969).
Calorimetric Standards

These SRM's are intended to relate the gain or loss of energy and work experienced during a chemical

reaction or by change of temperature to the units of energy and work as defined by the National Measurement

System. This system uses the units prescribed by the International System of Units (SI). The unit for energy and

work under this system is the joule, which is related to the calorie by the equation: 4. 184 joule = 1 calorie. Combustion Calorimetric Standards

Unit SRM Type Amount

39i Benzoic acid, 26.4 absolute kilojoules/gram 30 g 217c-5 2,2,4-Trimethvlpentane IN PREP

217c-25 2.2,4-Trimethvlpentane IN PREP

Solution Calorimetric Standards

SRM Type

Wt/Unit

(grams)

724a

1654 tris(hydroxymethyl)aminomethane a -Quartz for HF acid solution calorimetry 50

25

Heat Source Calorimetric Standards

SRM Type

Wt/Unit

(grams)

1651 1652

1653

Zirconium-barium chromate heat source powder (ca 350 cal/g) Zirconium-barium chromate heat source powder (ca 390 cal/g) Zirconium-barium chromate heat source powder (ca 425 cal/g)

50

50

50

Enthalpy and Heat Capacity Standards

SRM Type Range, K Unit Size

705 Polystyrene, powder 10-350 5g 720 Sapphire, synthetic (AKO,) 0-2250 15g 781-DI Molybdenum, sintered rod 273.15-2800 10 cm X 0.32 cm D. 781-D2 Molybdenum, sintered rod 273.15-2800 10 cm X 0.64 cm D.

1475 Polyethylene, powder 5-360 50g

Vapor Pressure Standards

These SRM's are intended for use in the testing and calibration of vapor pressure measurement apparatus

and techniques.

SRM Type

Pressure Range

(atmosphere)

Temperature Range

(K)

Unit Size

745 Gold 10- ' to 10 K 1300-2100 Wire 1.44 mm X 152 mm

746 Cadmium I0 J to 10" 350- 594 Rod 6.4 mm X 64 mm

748 Silver I0--1 to 10'- 800-1600 Rod 6.4 mm X 64 mm

62
Thermal Conductivity Standards

These SRM's cover the high, medium, and low conductivity ranges. They will be useful for intercomparing

thermal conductivity apparatus, debugging new apparatus, and calibrating comparative apparatus.

.3 IX IV! Type

Temperature Range

(K) Diameter (mm)

Length

(mm)

730-S1S Tungsten sintered 4-3000 3 2 730-S2S Tungsten, sintered 4-3000 3.2 100 730-S3S 4-3000 3.2 200 730-M1S Tungsten sintered 4-3000 6 4 50 730-M2S Tungsten sintered 4-3000 6 4 100 730-M3S Tungsten sintered 4-3000 6 4 200

730-MA Tungsten, arc-cast 4-3000 8.3 50 730-LA Tungsten, arc-cast 4-3000 10.2 50

730-1 XA 1 i itiOQtpn £i rr*-o £t ct 1 ? 7

734-S Electrolytic Iron 4-1000 6.4 305 734-L1 Electrolytic Iron 4- 1 000 31.8 152 734-L2 Electrolytic Iron 4-1000 31.8 305 735-S Stainless Steel 5-1200 6.5 300 735-M1 Stainless Steel 5-1200 12.5 150

735-M2 Stainless Steel 5-1200 12.5 300 735-L1 Stainless Steel 5-1200 35 50 735-L2 Stainless Steel 5-1200 35 100

Thermal Expansion Standards

These SRM's cover the temperature range from 20 to 2000 K having coefficients of thermal expansion

over the range of 0.5 to 17 X 10"6 K.

SRM Type

Temperature Range

(K) Diameter (mm)

Length

(mm)

731-L1 Borosilicate Glass 80-680 6.4 51 731-L2 Borosilicate Glass 80-680 6.4 102 731-L3 Borosilicate Glass 80-680 6.4 152 732 293-2000 6.4 51

736-L1 Copper 20-800 6.4 51 736-L2 20-800 6.4 102 736-L3 20-800 6.4 152 737 80-1800 6.4 51

738 IN PREP

739-L1 80-1000 6.4 51 739-L2 80-1000 6.4 102 739-L3 80-1000 6.4 152

Thermocouple Materials

These SRM's are intended to serve as a convenient mechanism for the comparison of manufactured wire

to standard reference thermocouple tables.

SRM Type Form

733

1967 Platinum, High-Purity (99.999+%)

Wire: 32AWG(0.2019 mm) diameter, 3 meters long Wire: 0.51 mm diameter. 1 meter long

63
Thermal Resistance Standards

This SRM is intended for use in calibrating, and verifying apparatus such as the guarded hot-plate (ASTM

CI 77) and heat flow meter (ASTM C518) used to determine the thermal resistance of thermal insulation

materials.

SRM Type Density Temperature Size

1450 Fibrous Glass Board ~ 140 kg m

3 255-330 K. 60 X 60 X 2.54 cm*

*Smaller square can be supplied.

Magnetic Standards

Magnetic Susceptibility Standards

These SRM's are intended for use in the calibration of instruments used to measure magnetic susceptibility.

SRM Type Form/ Unit

763-1 Cylinder 3 mm diameter X 3 mm

763-2 Aluminum Wire 0.5 mm diameter X 250 mm

763-3 Aluminum Rod 6 mm diameter X 175 mm

764-1 Platinum Cylinder 3 mm diameter X 3 mm

764-2 Platinum Wire 0.5 mm diameter X 50 mm

765-1 Palladium Cylinder 3 mm diameter X 3 mm

765-2 Palladium Wire 0.5 mm diameter X 50 mm

765-3 Palladium Sponge 1 gram

766-1 Manganese Fluoride Cube 3 X 3 X 3 mm

Magnetic Moment

This SRM is intended for the calibration of instruments used to measure magnetic moment.

SRM Type Size

772 Nickel Sphere 2.4 mm D.

Paramagnetic Resonance Standards

This SRM is intended for use in electron paramagnetic resonance (EPR) measurements for determining

the number of active paramagnetic centers in a test sample. This SRM consists of two pieces of synthetic ruby.

SRM Type Form

2601 Crystalline A1,Q,; Cr ,+ (Ruby) 1.5 X 1.5 X 0.5 mm

0.5 X 0.5 X 4 mm

64
Optical Standards

Spectrophotometry Standards

Filters for Spectrophotometry and Luminescence

The spectrophotometric SRM's are intended primarily for use in verifying the accuracy of the transmit- tance scale of spectrophotometers. The luminescence SRM provides relative emission spectra to determine

spectral responsivity and to verify the accuracy of spectrofluorimeters. All of these SRM's provide a means of

interlaboratory comparison of data. Glass Filters, SRM 930 D, consists of three neutral glass filters. The glass filters have transmittances of

approximately 10, 20, and 30 percent. Each filter is individually calibrated and certified for absorbance and

transmittance at wavelengths of 440, 465, 546.1, 590, and 635nm. The 546.1 nm wavelength coincides with the Mercury emission line.

Liquid Filters, SRM 931b, are absorbance standards for use in ultraviolet and visible spectrophotometry.

This SRM consists of 3 sets of 4 vials, each containing a blank solution and three solutions of different concentrations of an absorbing liquid. Each vial contains approximately 10 mL of solution. The net absorbances are certified for each concentration at wavelengths 302, 395, 512, and 678 nm. SRM 932, is an all-quartz rectangular parallelepiped cuvette designed to fit the holder

of conventional spectrophotometers. The distances between the parallel, optically-transparent windows are measured at 10 positions along the vertical axis. The cuvettes range in pathlength between 9.97 and 10.03 mm,

and the inner surfaces of the opposite windows are parallel within ± 0.002 mm. Each cuvette is certified for pathlength and parallelism of the windows to within + 0.0005 mm.

Potassium Dichromate, SRM 935, consists of crystalline potassium dichromate of established purity

certified for use as an ultraviolet absorbance standard. Solutions made with this SRM in 0.001 N perchloric acid are certified for their apparent specific absorbances/ , at 23.5° C and wavelengths of 235, 257, 313, 345, and 350 nm.

Quinine Sulfate Dihydrate, SRM 936, consists of powdered quinine sulfate dihydrate of known purity

certified for use as a spectrofluorimetric emission standard. A solution made with this SRM in 0.1 N perchloric

acid is certified for its molecular emission spectrum, E(A) at 25.0°C over the wavelength range of 375.0 to 675 nm.

Glass Filters, SRM's 2009, 2010, 2013 and 2014, are didymium-oxide glass absorbance standards for use in checking the photometric scale of spectrophotometers at 10 wavelengths between 441 and 1067 nm. SRM's 2013

and 2014 are higher accuracy standards that have been individually certified.

Glass Filter, SRM 2030, consists of one neutral glass filter. It is intended as a reference source for onepoint verification of the transmittance and absorbance scales of spectrophotometers at a wavelength of 465 nm

and a nominal 30% transmittance.

Metal-on-Quartz Filters, SRM 2031, consists of three filters mounted in metal holders and an empty

holder, all holders are equipped with shutters. Two of the filters have an evaporated layer of semitransparent

metal sandwiched between two quartz plates that have been assembled by optical contact. The third filter consists of two clear quartz plates assembled by the same technique. Each filter is individually calibrated at 250.

300, 340, 400, 465, 546, 590 and 635 nm.

Potassium Iodide, SRM 2032, consists of crystalline KI of established purity for use as a stray light

standard in the ultraviolet. Aqueous solutions made with this material are certified for their specific absorbance

at 23.5° C over a wavelength range from 240 to 280 nm.

Potassium Iodide with Attenuator, SRM 2033, consists of the same material used for SRM 2032 plus a

reference beam attenuator for extending the dynamic range of the stray light test.

65
Type

Glass Filters for Spectrophotometry

Liquid Filters for Spectrophotometry

Quartz Cuvette for Spectrophotometry

Crystalline Potassium Dichromate for Use as an Ultraviolet Absorbance Standard. Quinine Sulfate Dihydrate

Didymium-oxide glass Didymium-oxide glass Didymium-oxide glass Didymium-oxide glass Glass Filter for Transmittance Measurement

Metal-on-Quartz Filters for Spectrophotometry

Potassium Iodide for Use as a Stray Light Standard

Potassium Iodide with Attenuator for Use as Stray Light Standard

Unit

Set: 3 filters, 4 holders

Set: 12 vials

I each

15 grams

1 gram

1 filter in holder

51 X 51 mm

I filter in holder

51 X 51 mm

1 filter, 2 holders IN PREP

IN PREP

IN PREP

Thermal Emittance Standards

SRM's of normal spectral emittance are available in three materials, platinum-13 percent rhodium alloy

having low emittance, sandblasted and oxidized Kanthal (an iron-chromium-aluminum alloy) having inter- mediate emittance, and sandblasted and oxidized Inconel (a nickel-chromium-iron alloy) having high

emittance. SRM's of all three materials have been calibrated for normal spectral emittance at 800 and

1100 K; the Kanthal and Inconel standards at 1300 K and the platinum-13 percent rhodium at 1400 and

1600 K. Normal spectral emittance data is supplied at 156 wavelengths in the one to fifteen micron range for

all the combinations listed above. In addition, data for the platinum-13 percent rhodium SRM's is supplied

in the fifteen to thirty-five micron range at 1100 K.

SRM Type Unit Size

1402 Emittance standards 1/2 in disks Pt-13% Rh

1403 Emittance standards 7/8 in disks Pt-13% Rh

1404 Emittance standards 1 in disks Pt-13% Rh

1405 Emittance standards 1 1/8 in disks Pt-13% Rh

1406 Emittance standards 1 1/4 in disks Pt-13% Rh

1407 Emittance standards 2 in X 2 in squares Pt-13% Rh

1408 Emittance standards 1 in X 10 in strips Pt-13% Rh

1409 Emittance standards 3/4 in X 10 in strips Pt-13% Rh

1420 Emittance standards 1/2 in disks Kanthal

1421 Emittance standards 7/8 in disks Kanthal

1422 Emittance standards 1 in disks Kanthal

1423 Emittance standards 1 1/8 in disks Kanthal

1424 Emittance standards 1 1 / 4 in disks Kanthal

1425 Emittance standards 2 in X 2 in squares Kanthal

1427 Emittance standards 3/4 in X 10 in strips Kanthal

1428 Emittance standards 1/4 in X 8 in strips Kanthal

1440 Emittance standards 1/2 in disks Inconel

1441 Emittance standards 7/8 in disks Inconel 1442 Emittance standards 1 in disks Inconel 1443 Emittance standards 1 1/8 in disks Inconel

1444 Emittance standards 1 1 /4 in disks Inconel 1445 Emittance standards 2 in X 2 in squares Inconel

66
Refractive Index Standards

SRM's 21 lc and 217c are certified for refractive index at 20, 25 and 30 °C, from 435.8 to 667.8 nm for seven wavelengths, and are available in 5 and 25 mL ampoules.

SRM's 1820 and 1822 are certified for refractive index at thirteen wavelengths from 404.7 nm to 706.5 nm. These SRM's are designed for calibrating refractometers and certifying refractive index immersion

liquids, and should provide a basis for accurate measurements of refractive index and dispersion. They consist of two rectangular glass slabs: one slab has polished faces and is to be used to check the performance of

a refractometer; the second slab is unpolished and can be broken into fragments to certify the refractive index of immersion liquids by microscopic methods.

SRM 1823 consists of two silicone liquids that are chemically and thermally stable. The liquids are

miscible. and span the refractive index range of a variety of glasses and glass fibers that are examined

microscopically by immersion techniques. Used independently, the liquids are suitable for the calibration of refractometers. These liquids are certified for refractive index at ten wavelengths from 435.8 to 667.8 nm, at temperatures of 20, 40, 60, and 80 °C.

SRM Type

211c Toluene

217c 2,2,4-Trimethylpentane

1820 Glass (Borosilicate) 1822 Glass (Soda-Lime)

1823-1 Silicone Liquid (1) 1823-11 Silicone Liquid (11)

.497

.391 .488

.518 .518

.559

Radioactivity Standards

Information concerning the SRM appears on it or its container. A Certificate containing pertinent

information on the SRM is sent under separate cover; a photocopy of the certificate is sent with the SRM.

Copies of these Certificates and information concerning the applications of these SRM's are available on

request to the NBS Office of Standard Reference Materials. These materials (except the carbon- 14 con- temporary dating standard) are shipped only by express or air freight (shipping charges collect). The prices

of SRM's may change as current stocks are depleted and are replaced. Purchasers will be billed at the prices

in effect at the time of shipment.

The stated accuracies of the older standards are, in general, an estimate of the standard deviation added

to an estimate of maximum possible systematic error. The accuracies of more recent standards are based on

the 99 percent confidence level of precision, with the same estimate of systematic error. The International Commission on Radiation Units (ICRU) recommended definition of the activity (A)

of a quantity of a radioactive nuclide is the quotient of AN by At, where AN is the number of nuclear trans- formations that occur in this quantity, in time At: (A = AN/ At). NBS uses the abbreviation ntps for nuclear

transformation per second. In this list both ntps and dps are used; the latter when dps has been used in certi- ficates printed before 1968. The terms: aps, (3 ps, /3 + ps, K-x-rays ps, 7ps are used for the emission rates of

alpha particles, beta particles, positrons, K-x-rays, and gamma-rays, respectively.

The SRM's listed below, not marked with an asterisk (*), may be ordered singly, without a license,

under the general licensing provisions of the Atomic Energy Act of 1954. Those marked by an asterisk are

available only under the special licensing provisions of the Atomic Energy Act of 1954. NOTE: Certain radionuclides are not economical to maintain in stock because of short half lives or low

demand. When sufficient demand exists, based on letters of inquiry, these materials are prepared and those

who have expressed interest are notified of their availability. If you need any radionuclides not listed, contact the Radioactivity Section, Room CI 14, Radiation Physics Building, National Bureau of Standards,

Washington, D.C. 20234 (Telephone: 301-921-2668).

In addition, chemically stable solutions of most radionuclides, including those no longer issued by NBS

or that are currently out of stock, may be submitted to NBS for calibration as described in "Calibration and

Related Measurement Services of the National Bureau of Standards," NBS Special Publication 250 (1978).

Requests for these tests should be submitted, with full source information for approval of suitability, to the Radioactivity Section.

67
Alpha-Particle Standards

These SRM's consist of a practically weightless deposit of the nuclide on a thin platinum foil cemented

to a monel disk. SRM Radionuclide Approximate Activity at Time of Calibration (Month/ Year)

Uncertainty (%)

*4906 Plutonium-238 IN PREP

4904-E Americium-241 1(P to 6 X I03 ntps (2/70) 1.0 4907 Gadolinium-148 50 to 2 X 10" ntps (1/73) 1.7

Beta-Particle and Gamma-Ray Gas Standards

These SRM's contain the Radionuclide in the inactive gas at a pressure of about one atmosphere in a

glass break-seal ampoule.

SRM Radionuclide Approximate Activity at Time of Calibration (Month/Year)

Uncertainty (%)

4302 Argon-39 .... 3.3 X 10" ntps/source 1.5 4308 Krypton-85 . . . IN PREP

4935-C K.rypton-85 . . . 5 X 10 7 ntps/mole (3/74) 1.0 *4235 K.rypton-85 . . . 1 X 10 7 ntps/source (11/74) 1.0

Alpha-Particle, Beta- Particle. Gamma-Ray. and Electron-Capture Solution Standards

These standard reference materials are contained in flame-sealed ampoules.

SRM Radionuclide

Approximate Activity or Emission Rate per gram of Solution at Time of Calibration (Month, Year)Approx.

Weight of Solution (gram)Accuracy

(%)

4229 Aluminum-26 39 ntps (11/71) 4.6 1.1 4333 Americium-243 3 ntps (9/74) 5 1.5 4219-B Cadmium-109 1 X 105 7 ps (H/76) 5 2.0 4250 Cesium- 134 1 X I0b (9/77) 5.0 1.1 *4233 Cesium- 137 5 X 10 14 atoms (12/72) 5.1 0.5 4925 Carbon- 14 (benzoic acid in toluene) 2 X 104 dps (7/58) 3 2.4 4222 Carbon-14 (n-hexadecane) 4 X 10" dps (6/67) 3 3.1 4223 Carbon-14 (n-hexadecane) 4 X 103 dps (6/67) 3 3.1 4224 Carbon-14 (n-hexadecane) 4 X 102 dps (6/67) 3 3.1 4245 Carbon-14 (sodium carbonate) 4 X I05 dps (5/74) 5 1.0 4246 Carbon-14 (sodium carbonate) 4 X 104 ntps (5/74) 5 0.9 4247 Carbon-14 (sodium carbonate) 4 X 102 ntps (5/74) 5 1.1 4943 Chlorine-36 1 X 104 /3-ps (1962) 3 2.3 494 1-D Cobalt-57 6 X 10s ntps (5/73) 5 1.8 4913-B Cobalt-60 1 X 105 ntps (5/75) 5.1 1.1 4370 Europium-152 7 X 10" ntps (5/78) 5.1 1.4 4926-C Hydrogen-3 (ITO) 4 X 10 3 ntps (6/78) 18 1.2 4927-B Hydrogen-3 (rTO) 7 X 105 ntps ( 6 /78) 3 1.2 4947 Hydrogen-3 (C6 H S CH,) 3 X 10s dps (2/64) 4 1.0 *4949 Iodine-129 0.2 m Ci (1973) 1.1 1.7 4929-C Iron-55 2 X 104 K-x-ray ps (4/70) 3.9 2.7 *4226 Nickel-63 2 X 106 ntps (5/68) 4.1 1.0 4331 Plutonium-239 6aps (3/75) 2 1.0 4940-

Promethium-147 5 X 10 3 ntps (2/76) 3 1.9 4228-B Selenium-75 1 X 106 ntps (4/74) 5 2.9 4922-E Sodium-22 2 X 105/}+ps (3/67) 5.1 1.4 4919-D Strontium-Yttrium-90 4 X 103 ntps (4/75) 2.9 2.1 4234 Strontium-Yttrium-90 1 X 106 ntps (8/75) 3.1 1.5

Contemporary Standard for Carbon-14 Dating Laboratories SRM Description

4990 Oxalic acid; no specific activity is given. (One pound of oxalic acid taken from specially prepared material for use as a common contemporary standard against which world-wide measurements can be compared.)

NOTE: In Preparation.

68
Environmental Standards

SRM Radionuclides

Approximate Activity, or Emission Rate, per gram, at Time of Calibration (Month/ Year)

(s-'g"')

Form

Approx. Mass

(g)

Overall Uncertaintv (%)

40 IV, V ivi n

,

60p*wO,n 657z,n.n 4350 V^CI 111 1CU 90C r 90 VI , 1 per radionuclide (1/75) River 100 varies C U

,

Sediment

AC,

Til, 240 Pn

55 Fe, l25 Sb,

' 55 Eu, 2 ° 8 T1,

2l2 Pb, 2 > 2 Bi, Values 2,4 Pb, 2l4 Bi, given, but 226 Ra, 228 Th, 1 per radionuclide

uncertified 23 °Th, 232 Th,

23 'Pa, 234 U,

235 U, 238 U,

238 Pu, 24l Am,

224Cm

RM45b Contains the same radionuclides at SRM 4350 at approximately River 100 NA

equal concentrations. No values provided. Sediment

Low Energy Photon Sources*

SRM Radionuclide Approximate Emission Rate (Month/ Year)

Uncertainty (%)

4260-B Iron-55 1 to 2 X 104 kxs-'/steradian (4/77) 1.8 4261 Cadmium-109 10 5 kxs-' (6/76) 1.5 4264 Tin-121m 200 to 750 - 37.15 keVy s"' (5/71) 3.0

**These SRM's consist of a thin-layer deposit of the radionuclide on a thin stainless steel or platinum foil cemented to a monel disk. Gamma-Ray "Point-Source" Standards

This group of Standard Reference Materials is usually prepared by depositing the radioactive material and

sealing it between two layers of polyester tape, mounted on an aluminum ring. Exceptions to this procedure are americium, krypton, and thorium SRM's. The americium-241 SRM's, 4211 and 4213, are prepared by

electroplating americium onto a 0.010-cm thick platinum foil, which is covered with a 0.005-cm thick aluminum

foil. The aluminum-covered source is sandwiched between two layers of 0.036-cm thick polyurethane film tape.

The krypton-85 SRM, 4212, is prepared by sealing a krypton-85 impregnated aluminum foil between two glass

disks, with an epoxy adhesive. The thorium-228 SRM's, 4205 and 4206, are prepared by depositing and sealing the radionuclide between two layers of gold foil and this sandwich is then sealed between two double layers of

polyurethane-film tape.

SRM Radionuclide Gamma-Ray Energy

(mev)

Approximate Activity (ntps)

at Time of Calibration (Month/ Year)

Uncertaintv (%)

2.614 10 5 (12/76) 1.8 0.122-1.408 4 to 50 X 10" (5/78) 1.4 0.060 4 to 18 X 104 (2/70) 2.8 0.060 2 to 4 X 105 (2/70) 2.8 0.088 3 to 6 X 103 (11/76) 2.1 0.514 7 X 106 to 4 X I07 (5/71) 2.6 0.662 7 X 104 (12/68) 1.3 0.662 5 X 10s (12/68) 1.3 0.702, 0.871 4 to 6 X 10 3 (4/70) 1.5 0.5696, 1.0634, 1.7697 5 X 104 to I X 105 (1/73) 1.4 1.173, 1.333 1 to 2 X 105 (2/73) 1.2 1.173, 1.333 2 X 106 (4/69) 1.1 1.2745 6 X 104 (4/69) 1.5 1.2745 3 X 105 (4/ 69) 1.5

4206-B 4218-C

*4211 *4213

4202-C

*4212

4200-B

*4207 420 1- B

4240

4203-C

4210

499 1-C 4996-B

Thorium-228 .

Europium-152 . Americium-241

Americium-241 Cadmium-109 . Krypton-85 Cesium-137 . .

Cesium-137 . . . Niobium-94 . . . Bismuth-207 . . . Cobalt-60

Cobalt-60 Sodium-22

Sodium-22 . . . .

69
Radium Gamma-Ray Solution Standards

These samples are contained in flame-sealed glass ampoules.

SRM Radium Content

(in micrograms)

Uncertainty

(%)

4955 0.1 ±3.6

4956 0.2 4.4 4957 0.5 1.8 4958 1.0 1.8 4959 2.0 1.3

4960 5.0 1.3 4961 10 1.1 4962 20 1.1 4963 50 1.1 4964-B 102 0.5

Radium Solution Standards for Radon Analysis

These samples are contained in flame-sealed glass ampoules.

SRM Nominal Radium Content,

per gram (Month/ Year) Approx. Wt. Soln. (grams)

Uncertainty

(%)

495 1-C 10-" (4/78) 10.4 1.8 4950-D 10"9 (4/78) 10.3 1.5 4953-C 10-8 (4/78) 10.3 1.3 4952-B Blank Solution (8/76) 20 68

Radioactivity Standard Reference Materials Currently Not in Stock

Radionuclide Forms Status Radionuclide Forms Status

Americium-241

Argon-37

Argon-39

Barium-140 Cadmium-109

Calcium-45

Ceriuni-141 Cerium-144 Chromium-51

Gold-198

Iodine-125

Iodine-131 Iron-59 Manganese-54

Mercury- 197 Mercury-203

Mixed Radionuclides Molybdenum-99

Solution, Low energy photon source Gas

Gas

Solution

Solid, Low energy photon source Solution Solution

Solution

Point Source, Solution Solution

Solution

Solution

Solution

Point Source

Solution

Point Source, Solution

Point Sources, Solutions . . . Solution

1' E

E

C, F

C, F

A, F

C, F

C, F C

C, F

C, F

C, F

C, F

C, F

B

1

Niobium-95

Phosphorus-32

Plutonium-242 Polonium-210

Potassium-42 Scandium-46

Sodium-24

Strontium-85

Strontium-89

Strontium-90

Sulfur-35 Tantalum-182

Thallium-204 Thorium-228

Thorium-229

Tin-113 Xenon-127 Xenon-l31m

Xenon-133

Zinc-65

Point Source, Solution Solution

Solution

Plated Source

Solution

Solution

Solution

Point Source, Solution, Low energy photon source Solution

Solution

Solution

Solution

Solution

Point Source

Solution

Solution Solution

Solution Gas

Point Source, Solution

C, F

C, F A

D

C, F

C, F

C, F

A, F

E

C, F

C, F

C, F

F

FA

A

C, F

B

B

B

C, F

A. In preparation.

B. Issued periodically. C. Issued when sufficient demand is demonstrated.

D. Prepared on request.

E. Under development.

F. See, Calibration and Related Measurement Services of the National Bureau of Standards, SP250.

70
Metallurgical Standards

SRM 493 is intended for calibration x-ray diffraction equipment to determine the relative amounts of iron

carbide in steel. SRM's 485a and 488 are intended for the calibration of x-ray diffraction equipment used in determining the amount of retained austenite in ferrous materials.

SRM Type Form

485a

488

493

Austenite in Ferrite ~ 5%

Austenite in Ferrite ~ 15%

Spheroidized Iron Carbide (Fe,C) in Ferrite

IN PREP

Disk: 20.6 mm dia X 2.5 mm thick Wafer: 29 X 29 X 2.4 mm

Mossbauer Standards

These SRM's are issued for the calibration of the isomer shift of iron compounds and alloys and to provide a uniform basis for presentation of mossbauer isomer shift data.

SRM Type Form

725 Sodium Pentacyanonitrosylferrite II (Sodium Nitroprusside)

for Isomer Shift of Iron Compounds Platelet: 1 X 1 X 0.0775 cm

1541 Iron Foil Foil: 2.5 cm X 2.5 cm X 23 n m

X-ray Diffraction Standards

SRM's 640 and 674 are powdered materials to be used as internal standards for powder diffraction

measurements. The lattice parameter of SRM 640 has been accurately determined at 25.0° C using a high angle

goniometer and the NBS tungsten internal standard. The use of SRM 640 will allow the results to be coupled to Powder Diffraction File (when converted to the same wavelength) base on the NBS internal standards of 1966. The weighted average of the lattice parameter, a, uncorrected for refraction is 5.43088 A and the standard error

is estimate to be 3.5 X 10-5 A, SRM 674 is a set of five oxides for use in the quantitative analysis (intensity

measurement) of materials. Both peak height and integrated intensity of diffraction lines will be certified.

SRM Type Unit Size

640 Silicon Powder 10 g 674 Powder Diffraction Intensity IN PREP

A12 03 (a -alumina)

Ce02 Cr2 d,

Ti02 (rutile) ZnO

Gas Transmission Standard

SRM 1470 is for use in the measurement of the oxygen gas transmission rate using a volumetric

method (ASTM D1434), manometric method (ASTM D1434 or ISO 2556), or coulometric method of measurement. The oxygen gas transmission rate of SRM 1470 is 0.325 pmol/m2 /sec/ Pa at 296. 16K and

0.1013 MPa.

SRM Type Unit Size

1470 Polyester Plastic film for 15 sheets; oxygen gas transmission 23 cm square

71
Permittivity Standards

The three solution SRM's (1511, 1512, and 1513) are for calibrating cells and test capacitors used to determine the relative permittivity (dielectric constant) of liquids. The nominal dielectric constants (e) for SRM's 1511, 1512, and 1513 are: 2.0, 10.4, and 35.7, respectively. The four polymer SRM's (1516, 1517,

1518, and 1519) are for calibrating systems used to measure permittivity and related dielectric quantities.

These SRM's are disks of a fluorinated ethylene-propylene copolymer and are individually calibrated.

SRM Type Unit Size

1511 Cyclohexane 400 mL

1512 1 ,2-Dichloroethane 400 mL

1513 Nitrobenzene 400 mL

1516 Permittivity 38 mm diameter 2.5 mm thick 1517 Permittivity 38 mm diameter 5 mm thick 1518 Permittivity 51 mm diameter 2.5 mm thick 1519 Permittivity 51 mm diameter 5 mm thick

Reference Fuel Standards

SRM's 1815 and 1816 are intended for use in maintaining the integrity of motor and aviation fuels as

specified in the ASTM Manual for Rating Motor, Diesel and Aviation Fuels, Third Edition.

SRM Type Unit

1815a n-Heptane IN PREP

1816a Isooctane (2,2,4-Trimethylpentane) IN PREP

Resistivity Standards

SRM's 797, 798, and 799 are certified for electrical resistivities over wide temperature ranges for use

in calibrating knife edge and similar electric resistivity apparatus. At room temperature these SRM's have

the following resistivities: SRM 797, 10 10

s fl m, SRM 798, 81- 10" 8 ft-m, and SRM 799, 610 8 n-m. SRM's 1520 and 1521, Boron-Doped Silicon, are both sets of two single-crystal wafers, with nominal

resistivities of 0.1 and 10 O-cm, respectively. With the exception of thickness, these two SRM's are physically identical. They are intended for use in calibrating instruments used to measure the resistivity of silicon wafers by four-probe method (ASTM Method F-84).

SRM Type Unit of Issue

797-1 Electrolytic Iron Rod 0.64 cm dia. X 5 cm long

797-2 Electrolytic Iron Rod 0.64 cm dia. X 10 cm long

797-3 Electrolytic Iron Rod 0.64 cm dia. X 15 cm long

798-1 Austenitic Stainless Steel Rod 0.64 cm dia. X 5 cm long 798-2 Austenitic Stainless Steel Rod 0.64 cm dia. X 10 cm long

798-3 Austenitic Stainless Steel Rod 0.64 cm dia. X 15 cm long

799-S1S Tungsten, sintered 0.32 cm dia. X 5 cm long 799-S2S Tungsten, sintered 0.32 cm dia. X 10 cm long 799-S3S Tungsten, sintered 0.32 cm dia. X 20 cm long

799-M1S Tungsten, sintered 0.64 cm dia. X 5 cm long

799-M2S Tungsten, sintered 0.64 cm dia. X 10 cm long

799-M3S Tungsten, sintered 0.64 cm dia. X 20 cm long

1520 Boron-Doped Silicon 2 Wafers 4.2 cm dia. X 1 mm thick 1521 Boron-Doped Silicon 2 Wafers 4.2 cm dia. X <0.74 mm thick

72
ENGINEERING TYPE STANDARDS

These SRM's are intended to relate measurements used for production or quality control data to a central point of reference. The values certified for these materials are in some cases empirical and do not

necessarily relate to the National Measurement System.

Standard Rubbers and Rubber-Compounding Material

These SRM's have been prepared to provide the rubber industry with standard materials for rubber

compounding. They are useful for the testing of rubber and rubber-compounding materials in connection

with quality control of raw materials and for the standardization of rubber testing.

Each material has been statistically evaluated for uniformity by mixing rubber compounds and vul- canizing them in accordance with ASTM Designation D-15 and determining the stress-strain properties of

the resulting vulcanizates. Certificates are issued for the rubbers because the properties of different lots are not the same. Replacement lots of rubber-compounding SRM's impart essentially the same characteristics

to rubber vulcanizates so that Certificates are not issued for these SRM's.

Standard Rubbers

SRM Type

Wt/Unit

(grams)

385b 386h

388j

Natural

Styrene-butadiene 1500

Butyl

34,000

34,000

34,000

Rubber Compounding Materials

SRM Type

Wt/Unit

(grams)

370e 371g

372h

373f 374c 375g 378b

379 382a

384c 392

Zinc Oxide

Sulfur

Stearic Acid

Benzothiazyl disulfide Tetramethylthiuram disulfide Channel Black

Oil Furnace Black Conducting Black Gas Furnace Black

N-tertiary-Butyl-2-benzothiazolesulfenamide

Ethylene Thiourea

8,000

6,000

3,200

2,000

2,000 28,000

28,000

5,500 32,000

3,200

1,600

Reference Magnetic Tapes

These SRM's are intended for use in evaluating the performance of magnetic computer tapes and

maintining control over their production. Each SRM is individually calibrated and certified.

SRM Type Unit

1600 Secondary standard magnetic tape-computer

amplitude reference Cassette 3200 Secondary standard magnetic tape-computer

amplitude reference Reel/ 600 ft 3216 Secondary standard magnetic tape-computer

amplitude reference Cartridge

73
Centerline Drawings for Optical Character

Recognition-B Characters

These SRM's are exact copies of the centerline drawings that uniquely define each printed character shape

and size used in constant strokewidth Style B Optical Character Recognition (OCR-B) applications in accordance

with one or more of the following standards: American National Standard X3.49-1975, Character Set for Optical

Character Recognition (OCR-B); Federal Information Processing Standards Publication 32-1974, Optical

Character Recognition Character Sets; European Computer Manufacturers Association Standard ECMA-II for the Alphanumeric Character Set OCR-B for Optical Recognition, 3rd Edition, 1975; and Draft International

Standard ISO/DIS 1073/11, Alphanumeric Character Sets for Optical Recognition.

Although these standards may have different repertoires, those characters that are common among

them are identical. In addition these standards contain information on the nominal size, strokewidth, toler- ance, and relative position of characters. SRM Size OCR-B Characters

1901 1 118 1902 1 93

1903 1 21 1904 111 21 Sizing Standards

Glass Spheres for Particle Size

SRM Type Size (yum) Sieve Nos. Wt/Unit

(grams)

1003 Calibrated Glass Spheres 5-30 40-45 1004 Calibrated Glass Beads 34-120 400-140 63 1017a Calibrated Glass Beads 100-310 140-50 84 1018a Calibrated Glass Beads 225-780 60-25 74 1019a Glass Spheres IN PREP

Turbidimetric and Fineness Standard (Cement)

This SRM is available to calibrate the Blaine fineness meter according to the latest issue of Federal

Test Method Standard 158, Method 2101 or ASTM Designation C204; to calibrate the Wagner turbidimeter

according to ASTM Designation CI 15; and to determine sieve residue according to ASTM Designation

C430. Each set consists of twenty sealed vials, each containing approximately 10 grams of cement. This

SRM is supplied only in sets of twenty vials or multiples thereof. SRM Type Certification Unit

114m Portland Cement Residue on No. 325 sieve, electroformed wet method

Surface area (Wagner turbidimeter) Surface area (Air-permeability) Mean particle diameter (Air-permeability)

Set of 20 vials

Color Standards

These SRM's are available to illustrate a characteristic color for each of the ISCC-NBS color-name

blocks in NBS Special Publication 440, COLOR: Universal Language and Dictionary of Names. SRM 2106

consists of 251 color chips on 18 constant-hue centroid color charts, and constitutes a supplement to SP 440. SRM 2107 combines SRM 2106 with SP 440 to form a complete color kit. The centroid colors represent a systematic sampling of the whole color solid, each color of which has been carefully measured. Each centroid color has its own specification and can be used as a color standard. (NOTE: SP 440, may be purchased

separately from the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C.

20402.)

SRM Type Unit of Issue

2106 Centroid Color Charts Set: 18 Charts 2107 Color Kit Set: SRM 2106 and SP 440

74
Light-Sensitive Papers and Plastic Chips

Light-Sensitive Papers

Standard light-sensitive paper and booklets of standard faded strips of this paper are available for use in standardizing the dosage of radiant energy when testing textiles for color fastness by exposure in commercial carbon-arc fading lamps. The paper is distributed in units of 100 pieces 2 5/8 by 3 1/4 in. The

booklet contains six strips of the paper 1 1/4 in wide that have been faded by exposure in the NBS master

lamp. A copy of NBS Spec. Publ. 260-41, which describes the preparation and use of the materials, is fur- nished with each booklet.

SRM Type Unit of Issue

700d Light-sensitive paper .... Pkg. of 100 pieces—2 5/8 in X 3 1/4 in 70 Id Standard faded strips .... Booklet—6 strips 1 1/4 in wide

Light-Sensitive Plastic Chips

Standard light-sensitive plastic chips are available for use in calibration and standardization of

artificial weathering and fading apparatus. These chips are distributed in two thicknesses (0.060 and 0.124 in) in units of five plates 2 in by 4 1/8 in, and have been standardized by the measurement of the change of transmittance as a function of exposure (in standard fading hours) to the NBS master lamps.

SRM Type Unit of Issue

702 Light-sensitive plastic chips Package of 5 chips 0.124 in thick 703 Light-sensitive plastic chips Package of 5 chips 0.060 in thick X-Ray and Photographic Standards

SRM 1001, is a calibrated X-ray film step tablet of 17 steps that cover the optical density range from 0

to 4. SRM's 1008 and 1009 are calibrated photographic step tablets of 21 steps that cover the optical density

range from 0 to 4 and 0 to 3, respectively. All three step tablets are individually calibrated and certified for diffuse transmission density in con- formance with conditions specified for American National Standard Diffuse Visual Transmission Density,

D, (90; 3000 K: < 10°; V), in "ANSI PH2. 19-1976, American National Standard for Diffuse and Doubly

Diffuse Transmission Measurements (Transmission Density)."

SRM 1010a, Microcopy Resolution Test Charts, is used to test the resolving power of cameras or of

whole microcopying systems. SRM 1010a consists of five charts printed photographically on paper, and have

26 high-contrast five-line patterns ranging in spatial frequency from one cycle per millimeter to 18 cycles per

millimeter. Instructions for the use of the charts are supplied with each order.

SRM Type Unit

1001 X-ray Film Step Tablet (0-4) 1 tablet, 17 steps 1008 Photographic Step Tablet (0-4) 1 tablet, 21 steps 1009 Photographic Step Tablet (0-3) 1 tablet. 21 steps 1010a Microcopy Resolution Test Chart Set of 5 charts

Surface Flammability Standard

SRM 1002c, Hardboard Sheet, is issued for checking the operation of radiant panel test equipment in accordance with the procedures outlined in ASTM Standard E 162-78.

SRM Type Certification Unit of Issue

1002c Hardboard Sheet . IN PREP Set of 4

6 X 18 X 1/4 inch

75
Smoke Density Chamber Standards

These SRM's are certified for maximum specific optical density and are issued for performing operational checks of smoke density chambers.

SRM Type Maximum Specific Optical Density

Unit of Issue

1006a 1007a Non-flaming Exposure Condition (a -cellulose) Flaming Exposure Condition (plastic) IN PREP

Dm (corr.) = 17850(t) -132

3 sheets

3 sheets

Water Vapor Permeance

This material is intended for use in the measurement of water vapor permeance in accordance with

ASTM Method E-96. It may also be useful in other test methods where movement of water vapor across a

barrier is involved. These SRM's are made from sheets of poly (ethylene terephthalate) approximately 0.001 inches thick (25.4 n m). They are certified for water vapor permeance for both dry cup and wet cup procedure.

SRM Type Certification Unit of Issue

707-1 Water Vapor Permeance Dry Cup—0.66 perm 12 sheets, 6 in diameter

707-2 Water Vapor Permeance Wet Cup—0.72 perm 6 sheets, 10 X 12 inches

Tape Adhesion Testing Standard

This material is intended as a uniform source of linerboard for use under ASTM Designation D2860,

Procedure A: Adhesion of Pressure Sensitive Tape to Fiberboard at 90 Degree Angle and Constant Stress.

SRM Type Unit

1810 Linerboard for Tape Adhesion Testing Package of 50 sheets

76
RESEARCH MATERIALS

Research Materials (RM's) are in addition to and distinct from the Standard Reference Materials

(SRM's) issued by NBS. The distinctions between Research Materials and Standard Reference Materials are

in the information supplied with them and purpose for which they are used. Unlike SRM's, the RM's are not

issued with Certificates of Analysis; rather they are accompanied by a "Report of Investigation," the sole authority of which is the author of the report. A Research Material is intended primarily to further scientific or technical research on that particular material. One of the principal considerations in issuing an RM is to provide homogeneous material so that an investigator in one laboratory can be assured that the material he

has is the same as that being investigated in a different laboratory.

RM-1C Ultra-purity aluminum single crystal cubes (1 cm on a side) are intended for use in studies of a

variety of solid state phenomena for which both extreme purity and knowledge of crystallographic orientation are required; e.g., in studies of electron spin resonance, De Haas-Van

Alphen effect, cyclotron resonance, and in a variety of studies relating to the Fermi surface and

the transport properties of aluminum.

RM-1R Ultra-purity aluminum polycrystalline rods (4.2 mm in diameter and 25.4 mm long) are intended

for use in research on the mechanical and physical properties of extremely pure aluminum: e.g., in the determination of resistivity as a function of strain at cryogenic temperatures to facilitate the design of cryogenic magnets or superconductor stabilizing elements.

RM 5 Copper Heat Capacity Test Specimen. This Research Material is intended for the comparison of

heat capacity results from different laboratories and as a test specimen for heat capacity

measurement below 25K, but it may also be useful at higher temperatures. It is available as a rod of high purity polycrystalline copper 19 mm (0.75 in) in diameter and 120 mm (4.75 in) in length.

RM 30 Glasses for Microanalysis (RM 30) and Glass Fibers for Microanalysis (RM 31). This homogeneous

RM 31 vitreous solid contains known, low-concentration additions of several elements which were

developed for electron probe microanalysis (EMPA) and secondary ion mass spectrometry

(SIMS). Each RM contains ten compositions of various oxides: RM 30, rods; RM 31, fibers. RM 40 Polystyrene solution in a mixture of tri-cresyl-phosphate and Aroclor. This Research Material can

be used to check instruments used in polymer technology and science for the determination of

Theological properties of polymer melts or solutions. It was designed so that the limiting viscosity

is obtained at 25 °C at shear rates as high as 1 reciprocal second. Values are given for rate of

shear, viscosity, and first and second normal stress difference at 25 °C. Unit of issue: 250 mL.

RM 45b Homogeneous River Sediment. This Research Material should be particularly useful for testing

radiochemical procedures for the assay of radioactivity in sediments and soils. Unit of issue: 100 grams.

RM 50 Albacore Tuna. This Research Material is intended to be used in the measurement of elements

present at trace concentration. It has been issued as a lyophilized (freeze-dried) marine biological

tissue sample in an attempt to satisfy many of the analytical requirements for a base-line marine

reference material. The Report of Investigation provides informational data (not certified) on

mercury, selenium, zinc, arsenic, lead, and a number of other elements of interest to marine

scientists. Unit of issue: two 35-g cans.

77
Phosphors

These materials are issued without Certification. NBS Technical Note 417, Spectral Emission Properties of NBS Standard Phosphor Samples Under Photo-Excitation, is issued with these materials, and is equivalent to the "Report of Investigation" issued with Research Materials. They are issued so that those

interested in developing methods of measurement for phosphor materials can work on a common source of

materials. NBS Technical Note 417 may be purchased from Superintendent of Documents, U.S. Government

Printing Office, Washington, D.C. 20402, for 25 cents, by SD Catalog No. C13.46:47.

SRM Type

Wt/Unit

(grams)

1020 Zinc sulfide phosphor 14 1021 Zinc silicate phosphor 28 1022 Zinc sulfide phosphor 14

1 UZj 11 H 1024 Zinc-cadmium sulfide phosphor (Cu activator) 14

1025 Zinc phosphate phosphor 28 1026 Calcium tungstate phosphor 28 1027 Magnesium tungstate phosphor 28 1028 Zinc silicate phosphor 28 1029 Calcium silicate phosphor 14

1030 Magnesium arsenate phosphor 28

1031 Calcium halophosphate phosphor 28 1032 Barium silicate phosphor 28 1033 Calcium phosphate phosphor 28

7X
SPECIAL REFERENCE MATERIALS

Special Reference Materials (GM's) are distributed by NBS to meet industry needs. These materials

have been standardized either by some Government agency other than NBS, or by some standards-making

body such as the American Society for Testing and Materials (ASTM), the American National Standards

Institute (ANSI), and the Organization for International Standardization (ISO). For this class of materials,

NBS acts only as a distribution point and does not participate in the standardization of these materials.

GM-1 Hydrogen in Steel Standards were produced and certified by the Welding Institute in Cambridge,

England, and are distributed in the United States by NBS. GM-1 is a set of 15 cylinders, 5 each

of HI, H2, and H3, containing nominally 0.05, 0.10, and 0.20 mL hydrogen, respectively. The

cylinders are 6.35 mm in diameter and about 30 mm long, weighing approximately 6 grams.

GM-2 Hydrogen in Steel Standards were produced and certified by the Welding Institute in Cambridge,

England, and are distributed in the United States by NBS. GM-2 is a set of 15 cylinders, 5 each of

H4, H5, and H6, containing nominally 0.20, 0.60, and 1.10 mLhydrogen, respectively. The cylinders are 12.7 mm in diameter and about 30 mm long, weighing approximately 22 grams.

GM-5 Nickel and Vanadium in Residual Oil was produced and analyzed under the sponsorship of the Western Oil and Gas Association and the American Petroleum Institute, and is distributed by

NBS. The assigned values for nickel and vanadium are 93 and 79 ppm, respectively. GM-5 is issued in 475 mL units. GM-21- Cellular Plastics. These GM's are to be used in comparison of fire research data. Each of these GM-58 GM's is shipped FOB: Gaithersburg, Md.

\j rvi Type

Density

(lb/ft-')

Thickness

(inches)

Size Width

(it)

Length

(ft)

21 Flexible Polyurethane 2 6 2 2 22 Flexible Polyurethane 2 6 4 6 23 Flexible Polyurethane, FR 2 6 2 2 24 Flexible Polyurethane, FR 2 6 2 6 25 Flexible Polyurethane, HR 4 6 2 2 26 Flexible Polyurethane, HR 4 6 2 6 27 Flexible Polyurethane, HR/FR 4 6 2 2 28 Flexible Polyurethane, HR/FR 4 6 2 6 29 Rigid Polyurethane 2 4 2 2 30 Rigid Polyurethane 2 4 4 6

31 Rigid Polyurethane, FR >25 FS 2 4 2 2 32 Rigid Polyurethane, FR >25 FS 2 4 4 6

35 4 6 2 2 36 Rigid Polyurethane, HR 4 6 2 6 37 Rigid Polyurethane, HR/FR 20 6 2 2 38 Rigid Polyurethane, HR/FR 20 6 2 6 39 Rigid Polyurethane Sprayed on Asbestos Cement Board, >25 Fs 2 1.5 4 4 40 Rigid Polyurethane Sprayed on Asbestos Cement Board, <25 FS 2 1.5 4 4

41 Rigid Trimer 2 4 2 2 42 Rigid Trimer 2 4 4 6 43 Rigid Trimer, ~ 25 FS 2 4 2 2 44 Rigid Trimer, ~ 25 FS 2 4 4 6 47 Polystyrene Expanded 4 2 2 48 Polystyrene Expanded 4 4 6 49 Polystyrene Expanded, FR 4 2 2 50 Polystyrene Expanded, FR 4 4 6

51 Polystyrene Extruded 3 2 2 52 Polystyrene Extruded 3 2 6 53 Polystyrene Extruded, FR 3 2 2 54 Polystyrene Extruded, FR 3 2 6 57 Phenolic Foam 2 4 2 2 58 Phenolic Foam 2 4 4 4

79
Differential Thermal Analysis Standards

GM's 754, 757, 758, 759, and 760 have been issued by NBS in cooperation with the International Con

federation of Thermal Analysis as standards for calibrating differential thermal analysis and related thermo

analytical equipment under operating conditions.

GM Material Peak Temp. (°C) Unit

754 Pn 1 vq t v rp np ~ 105 °C IU g

757 1 /— Diph 1 nrnpt ha np ~ -32 °C 4 raL

(""vrlnhpva np ( tra n*;i t 1 on

~ -83 °C 4 mL

(melting) ~ + 7 °C

Phenyl Ether ~ 30 °C 4 mL

n-Xprnhpnvl ~ 58 °C 5 B

758 Potassium Nitrate ~ 128 °C 10 s Indium ~ 157 °C 3 e Tin ~ 232 °C 3g

Potassium Perchlorate ~ 300 °C 10 g

Silver Sulfate ~ 430 °C 3 e

759 Potassium Perchlorate ~ 300 °C 10 e Silver Sulfate ~ 430 °C 3 e. Quartz ~ 573 °C 3g

Potassium Sulfate ~ 583 °C 10 g Potassium Chromate ~ 665 °C 10 g

760 Quartz ~ 573 °C 3g

Potassium Sulfate ~ 583 °C 10 g Potassium Chromate ~ 665 °C 10 g Barium Carbonate ~ 810°C 10 g Strontium Carbonate ~ 925 °C 10 g

80
STANDARD REFERENCE MATERIALS TO BE DISCONTINUED

When the current supplies are exhausted, the SRM's listed below will be discontinued, because of limited user demand or technological obsolescence.

SRM Type

404a Steel, basic electric 405a Steel, medium manganese

407a Steel, chromium-vanadium

408a Steel, chromium-nickel 409b Steel, nickel 413 Steel, A.O.H. 0.4C 414 Steel. Cr-Mo (SAE 4140) 417a Steel, B.O.H. 0.4C

418a Steel, Cr-Mo (SAE X4130)

420a Iron, ingot 427 Steel, Cr-Mo (boron only) (SAE 4150) 436 Steel, special Cr6-Mo3-W10

437 Steel, special Cr8-Mo2-W3-Co3

438 Steel, Mo high speed (AISI-SAE-M30)

439 Steel, Mo high speed (AISI-SAE-M36)

440 Steel, special W high speed Cr2-W13-Col2

441 Steel, W high speed (AISI-SAE-T1)

442 Steel, stainless, Crl6-Nil0

443 Steel, stainless, Crl8.5-Ni9.5 444 Steel, stainless, Cr20.5-NilO 445 Steel, stainless, Crl3-Mo0.9 (Modified AISI 410) 446 Steel stainless, Crl8-Ni9 (Modified AISI 321) 447 Steel, stainless, Cr24-Nil3 (Modified AISI 309) 448 Steel, stainless, Cr9-Mo0.3 (Modified AISI 403) 449 Steel, stainless, Cr5.5-Ni6.5 450 Steel, stainless, Cr3-Ni25

593 Hydrocarbon blends—Blend No. 2 596 Hydrocarbon blends—Blend No. 5 597 Hydrocarbon blends—Blend No. 6 599 Hydrocarbon blends—Blend No. 8 803a Steel, A.O.H. 0.6C D803a Steel, A.O.H. 0.6C

804a Steel, basic electric 805a Steel, medium manganese

807a Steel, chromium-vanadium D807a Steel, chromium-vanadium

808a Steel, chromium-nickel D809b Steel, nickel 817a Steel, B.O.H. 0.4C

820a Iron, ingot D820a Iron, ingot 821 Steel, Cr-W, 0.9C

827 Steel, Cr-Mo (boron only) (SAE 4150) 837 Steel, special (Cr8-Mo2-W3-Co3)

D837 Steel, special (Cr8-Mo2-W3-Co3)

D838 Steel, Mo high speed (AISI-SAE-M30)

840 Steel, special W high speed (Cr2-W13-Col2)

D840 Steel, special W high speed (Cr2-W13-Col2)

D841 Steel, W high speed (AISI-SAE-T1)

849 Steel, Cr5.5-Ni6.5

SRM Type

D849 Steel, Cr5.5-Ni6.5 850 Steel, Cr3-Ni25 D850 Steel, Cr3-Ni25

1020 Zinc sulfide phosphor

1021 Zinc silicate phosphor

1022 Zinc sulfide phosphor

1023 Zinc-cadmium sulfide phosphor (Ag activator) 1024 Zinc-cadmium sulfide phosphor (Cu activator) 1025 Zinc phosphate phosphor

1026 Calcium tungstate phosphor

1027 Magnesium tungstate phosphor

1028 Zinc silicate phosphor

1029 Calcium silicate phosphor

1030 Magnesium arsenate phosphor

1031 Calcium halophosphate phosphor

1032 Barium silicate phosphor

1033 Calcium phosphate phosphor

1402 Emittance std. 1/2 in. disk 1403 Emittance std., 7/8 in. disk 1404 Emittance std., 1 in. disk 1405 Emittance std., 1 1/8 in. disk 1406 Emittance std., 1 1/4 in. disk 1407 Emittance std., 2 in. X 2 in. 1408 Emittance std., 1 in. X 10 in. 1409 Emittance std., 3/4 in. X 10 in. 1420 Emittance std., 1/2 in. disk

1421 Emittance std., 7/8 in. disk 1422 Emittance std., 1 in. disk 1423 Emittance std., 1 1/8 in. disk 1424 Emittance std., 1 1/4 in. disk 1425 Emittance std., 2 in. X 2 in. 1427 Emittance std., 3/4 in. X 10 in. 1428 Emittance std., 1/4 in. X 8 in. 1440 Emittance std., 1/2 in. disk

1441 Emittance std., 7/8 in. disk 1442 Emittance std., 1 in. disk 1443 Emittance std., 1 1/8 in. disk 1444 Emittance std., 1 1/4 in. disk 1445 Emittance std., 2 in. X 2 in. 1511 Cyclohexane, dielectric 1512 1,2 Dichloroethane, dielectric 1513 Nitrobenzene, dielectric 1516 Permittivity std., 38 mm X 2.5 mm

1517 Permittivity std., 38 mm X 5 mm

1518 Permittivity std., 51 mm X 2.5 mm

1519 Permittivity std., 51 mm X 5 mm

1902 Centerline Drawings, OCR-B Size I, 93 characters 1903 Centerline Drawings, OCR-B Size I, 21 characters 1904 Centerline Drawings, OCR-B Size HI, 21 characters

81
OTHER SERVICES OF THE NATIONAL BUREAU OF STANDARDS

The following is a list of some of the services offered by NBS that may be of interest to SRM users. For

general information see the entry on Technical Information and Publications.

Calibration and Related Measurement Services of the

National Bureau of Standards

The measurement services of the National Bureau of Standards include the calibration of standards, test of

instruments, and certain interlaboratory testing programs. These services are listed in NBS Special Publication

250, Calibration and Related Measurement Services of the National Bureau of Standards. [Available from the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402, as SN 003-003-

01916-0 (1978 edition) for $3.]

These services are performed at the National Bureau of Standards Washington laboratories (Gaithersburg, Md.) or the National Bureau of Standards laboratories in Boulder, Colorado.

An abbreviated list of the services offered under this program is given below. For information concerning

services not listed below or in Special Publication 250 contact:

Office of Measurement Services

National Bureau of Standards

Washington, D.C. 20234

Telephone: (301) 921-2805

Washington Services

Acoustics (301) 921-3607

Aerodynamics (301) 921-3684

Angular (301) 921-2216

Computer Science (general) (301) 921-3723

Density (301) 921-251

Dosimetry in High-Energy Electron Beams (301) 921-2361

Electrical Instruments (AC) (301) 921-2715

Electrical Instruments (DC) (301) 921-2727

Engineering Tests (301) 921-2946

Flatness (301) 921-2216

Flow Rate Meters (301) 921-3681

Fluid Quantity (301) 921-3681

Force Measurements (301) 921-2511

Gamma-Ray Sources (301) 921-2361

Humidity (301) 921-2794

Hydraulics (301) 921-3684

Image Optics (301) 921-2181

Impedance (301) 921-2715

Interlaboratory Testing Programs (301) 921-2946

Length (301) 921-2216

Magnetic Disk Calibrations (301) 921-3723

Magnetic Measurements (301) 921-2707

Mass (301) 921-2511

Neutron Sources (301) 921-2234

Photography (301) 921-2181

Photometric Calibrations (301) 921-3613

Precision Apparatus (301) 921-2715

X2
Proving Rings (301) 921-2511

Radiation Thermometry (301) 921-3613

Radioactivity (301) 921-2665

Radiometric Calibrations (301) 921-3613

Resistance (301) 921-2715

Resistance Thermometers (301) 921-2757

Roundness (301) 921-2216

Spectrophotometric Standards (301) 921-2453

Straightness (301) 921-2216

Surface Texture (301) 921-2182

Thermocouples and Thermocouple Materials (301) 921-2069

Thermometers, Laboratory (301) 921-2087

Ultraviolet Spectral Radiance Standard (301) 921-2071

Vibration (301) 921-3607

Voltage, High (301) 921-3121

Voltage (301) 921-2715

Weights and Measure (301) 921-2401

X- and Gamma-Ray Measuring Instruments (301) 921-2361

Boulder Services

All measurement services available in Boulder should be directed to:

Measurement Services Clerk

National Bureau of Standards

Boulder, Colorado 80303

Telephone: (303) 499-1000, ext. 3753

Cryogenics

Electromagnetics (Radio, Microwave, and Laser Frequencies)

1. Attenuation

2. Fields (Electromagnetic)

3. Impedance

4. Laser Parameters

5. Noise Temperature (Effective)

6. Phase Shift

7. Power

8. Voltage

Time and Frequency Measurements

S3
Standards Information Service

The Standards Information Service (SIS) maintains a reference collection of some 240,000 engineering

standards issued by U.S. technical societies, professional organizations, and trade associations; State purchasing

offices; U.S. civilian government agencies; and the major foreign national and international standardizing

bodies. The collection is open to the public Monday through Friday from 8:30 a.m. to 5 p.m. SIS publishes general and special indices of standards. Information services consist of responding to

inquiries by searching Key-Word-In-Context (KWIC) Indices to determine whether there are any published

standards, specifications, test methods, or recommended practices for a given item, product, or material.

Inquirers are referred to the appropriate source to obtain copies of standards. SIS neither sells nor distributes standards.

Inquiries or requests for additional information should be directed to:

Standards Information Service

Room B162, Technology Building

National Bureau of Standards

Washington, D.C. 20234

Telephone: (301) 921-2587

Standard Reference Data

The National Standard Reference Data System (NSRDS) is a nationwide program established to make

critically evaluated data in the physical sciences available to the technical community. It publishes compilations

of critically evaluated data, critical reviews and bibliographies. A complete listing of the publications of the NSRDS is available from the Office of Standard Reference Data (OSRD). The OSRD responds in a limited

way to queries within the scope of the program by providing references, referrals, documentation, or data, as

available. The program's bimonthly newsletter is available on request. Inquiries or requests for further information should be directed to:

Information Services

Office of Standard Reference Data Reference Center

Room A320, Physics Building

National Bureau of Standards

Washington, D.C. 20234

Telephone: (301) 921-2228

Technical Information and Publications

The Technical Information and Publications Division maintains a general correspondence and inquiry service on the technical activities of the National Bureau of Standards. Inquiries of a general nature and not covered by

the services listed above should be directed to:

Technical Information and Publications Division

Room A617, Administration Building

National Bureau of Standards

Washington, D.C. 20234

Telephone: (301) 921-2318

S4
GUIDE FOR REQUESTING DEVELOPMENT OF

STANDARD REFERENCE MATERIALS

The National Bureau of Standards has the function to develop, produce, and distribute Standard

Reference Materials (SRM's) that provide a basis for comparison of measurements on materials and that aid in the control of production processes. To perform this function, the Office of Standard Reference Materials

evaluates the requirements of science, industry, and government for carefully characterized reference materials,

and directs their production and distribution. NBS currently has over 1000 SRM's available, about 100 new ones in preparation, and requests for the preparation of many others. In developing an NBS-SRM, the candidate material must meet one or more of the criteria listed below.

1. The SRM must permit users to attain more accurate measurements.

2. The production of the SRM elsewhere is not economically or technically feasible.

3. The SRM would be an industry-wide standard for commerce from a neutral source not otherwise

available.

4. NBS production of the SRM would provide continued availability from a common source for a highly

characterized material that is important to science, industry, or government.

NBS has recognized and responded to the need to enlarge the scope of the program to include all types of

well-characterized materials that can be used to calibrate a measurement system or to produce scientific data

that can be readily referred to a common base. However, the demand for new SRM's greatly exceeds the Bureau's capacity to produce and certify these materials. Consequently, requests for new SRM's that would

have limited use, or for which the need is not very great, are deferred in favor of requests that clearly show a

critical need. To determine which requests are to receive top priority, NBS needs and heavily relies upon the information supplied by industry, either through its own representatives or through interested organizations,

such as the American National Standards Institute, American Nuclear Society, American Petroleum Institute,

American Society for Testing and Materials, etc. Accordingly, while the Bureau welcomes all requests for the development of new SRM's, both the Bureau

and industry would be helped, if such requests are accompanied by information that will permit an objective assessment of the urgency and importance of proposed new reference materials.

Requests for the development of new Standard Reference Materials should include as much of the information listed below as possible.

1. Short title of the proposed Standard Reference Material.

2. Purpose for which the SRM would be used.

3. Reasons why the SRM is needed.

4. Special characteristics and/ or requirements for the material. Include additional requirements and

reasons, if more than one SRM is necessary for standardization in this area.

5. Your estimate of the possible present and future (6-10 year) demand for such an SRM in your own

operations and elsewhere. (National and international estimates are very useful.)

6. Whether such an SRM, or a similar one, can be produced by, or obtained from a source other than

NBS. If so, give reasons to justify its preparation by NBS.

7. Miscellaneous pertinent information to aid justification for the SRM, such as: (a) an estimate of the range of application, monetary significance of the measurement affected, and scientific and /or technological

significance including, when feasible, estimates of the impact upon industrial productivity or growth, and (b)

supporting letters from industry leaders, trade organizations, interested committees, and others.

85
CERTIFIED REFERENCE MATERIALS FROM OTHER SOURCES

Sources of certified reference materials (CRM's) are now world wide. Currently, no international cata- log exists, but the International Standards Organization (ISO), through its Council Committee on Reference

Materials (REMCO), is in the process of preparing such a catalog. Publication of this international catalog is scheduled for late 1979 and inquires should be directed to:

Mr. M. Parkany

Secretary for REMCO

International Organization for Standardization

I, Rue de Varembe

Case Postale 56

1211 Geneva 20

Suisse, Switzerland

In the period 1972-1977, the International Union of Pure and Applied Chemistry (IUPAC) through its Commission on Physicochemical Measurements and Standards prepared and issued a catalog of CRM's that are useful for the realization of physicochemical properties. The national laboratories that responded to the request for such information were: COUNTRY NATIONAL LABORATORY

Australia Commonwealth Scientific and Industrial Research

Organization

National Standards Laboratory

University Grounds, City Road

Chippendale, NSW 2008

Australia

Germany (West) Bundesanstalt fur Materialpriifung

Unter den Eichen 87, Dl Berlin 45

Federal Republic of Germany

The Physikalische-Technische Bundesanstalt

Bundesalle 100, 33 Braunschweig

Federal Republic of Germany

Hungary National Office of Measures

Nemetologyi ut 37-39, .sz. Budapest XII Hungary

Japan The Government Chemical Industrial Research Institute of Tokyo

1-Chome, Honmachi, Shibuya-Ku

Tokyo

Japan

Netherlands Institute for Physical Chemistry TNO

Utrechtseweg 48, P.O. Box 108

Zeist

The Netherlands

S6
Poland Division of Physico-Chemical Metrology

National Board for Quality Control and Measures

2, Elektoralna Street, Warsaw

Poland

United Kingdom National Physical Laboratory

Teddington, Middlesex

England

The current IUPAC edition is: Physicochemical Measurements: Catalogue of Reference Materials

from National Laboratories, Revised 1976, Pure & Appl. Chem., 48, 503-414 (1976).

Domestic (US) sources, of CRM's, including a large number of uncertified reference materials, are

listed in, Guide to United States Reference Materials, NBS Spec. Publ. 260-57, (Feb. 1978), U.S. Government

Printing Office, Washington, D.C. 20402.

87
ALPHABETICAL INDEX

ACIDIMETRIC

P 38 Benzoic acid Potassium phthalate, acid ALLOYS CHEMICAL COMPOSITION

(See also individual metals) Aluminum

Chip form 25 Wire (neutron monitor density) 53 Cobalt Chip form 26 Wire (neutron monitor density) 53 Copper

Chip form 26 Microprobe 36

Solid form 31 Ferro (steelmaking) 23 Gold

High-purity 36 Microprobe wire 37 High temperature

Solid form 22

IronChip and granular form 24 Microprobe 37

Solid form 24 Lead

Chip form 28

Solid form 33 Magnesium

Chip form 28 Molybdenum

Microprobe 37

Nickel Chip form 28 Oxides 29

Solid form 33 Platinum 36 Doped, wire

High-purity, wire Selenium 29 Granular form

Silver 37 Microprobe

Solder Chip form 28

Solid form 33 TinChip form 29 Titanium Chip form 29

Solid form 33 Gas-in 35 Tungsten 37 Microprobe

Spelter 34 ZincChip form 30

High-purity 36

Solid form 34 Zirconium Chip form 30

Solid form 24 ALUMINUM

Al-Co alloy (neutron density monitor wire) 53

Al-Si alloy 25 Freezing point standard 61 Metallo-organic compound 46

Radioactivity 67 Wrought alloy 25

Page AMERICIUM

Radioactivity 67 AMMONIUM DIHYDROGEN

PHOSPHATE

Fertilizer 46 ANALYZED GASES (ENVIRONMENTAL) 41 Carbon dioxide in nitrogen

Carbon monoxide in air Carbon monoxide in nitrogen Methane in air Methane-propane in air Nitric oxide in nitrogen

Oxygen in nitrogen

Propane in air Sulfur dioxide in nitrogen

ANALYZED LIQUIDS AND SOLIDS

(ENVIRONMENTAL) 42

Coal, sulfur in Coal, trace elements in Coal fly ash, trace elements in Fuel oil, trace elements in Mercury in coal Mercury in water

Nickel and vanadium in residual oil 79 Permeation tubes 43

Sulfur in distillate fuel oil Sulfur in residual fuel oil Trace elements in water ARSENIC

Trioxide (oxidimetric value) 38 ASSAY STANDARDS

(See specific constituent) BARIUM

Metallo-organic compound 46 BASIMETRIC

Tris(hydroxymethl)aminomethane 38 BENZENE ON CHARCOAL 44 BENZOIC ACID

Acidimetric 38 Calorimetric 62 Microchemical 38 BERYLLIUM ON FILTER MEDIA 44 BIOLOGICAL STANDARDS 39 Brewers yeast

Liver, bovine Orchard leaves Oyster tissue Pine needles Rice flour Spinach Tomato leaves Tuna, Albacore 77 Wheat flour BISMUTH

Radioactivity 67 BORON

Boric acid 53

Boric acid (B-10 enriched) 53 Metallo-organic compound 46 CADMIUM

Metallo-organic compound 46

Radioactivity 67 Vapor pressure 62 CALCIUM

Carbonate (clinical) 39 Chloride (ion selectivity) 54 Metallo-organic compound 46 Molybdate (steelmaking) 23

XX
Page CALORIMETRIC 62 Combustion calorimetric Heat source CANE SUGAR (Sucrose) 38 CARBIDES

Tungsten carbide 50 CARBON

Channel black (rubber compounding) 73 Conducting black (rubber compounding) 73 Gas furnace black (rubber compounding) 73

Oil furnace black (rubber compounding) 73 Carbon dioxide in nitrogen 41 Carbon monoxide in nitrogen 41 CARBON STEELS 14 CARBON TETRACHLORIDE ON

CHARCOAL 44 CAST IRONS 24

Blast furnace Car wheel Chip form

Ductile Nodular

Solid form

White CAST STEEL 24 CELLULAR PLASTICS 79 CEMENTS

Portland (chemical composition) 50 Turbidimetric and fineness 74 CERAMIC MATERIALS

Carbides 50

Glasses 49

Minerals 48

Refractories 49 CERIUM

Radioactivity 67 CESIUM

Radioactivity 67 CHEMICAL STANDARDS

Primary 38 Acid potassium phthalate Arsenic trioxide Benzoic acid Boric acid Potassium chloride Potassium dichromate Sodium oxalate Sucrose Tris(hydroxymethyl)aminomethane

Uranium oxide

Intermediate purity Selenium 29 Zinc 36 CHLORINE

Isotopic reference 53

Radioactivity 67 CHLOROFORM ON CHARCOAL 44 CHROMIUM

Ferro (steelmaking) 23 Metallo-organic compound 46

Isotopic reference 53

Radioactivity 67

Refractories 49 CLAYS 48

Flint Plsstic CLINICAL LABORATORY STANDARDS 39

Antiepilepsy drug level assay

Bilirubin Bovine serum albumin (powder)

Bovine serum albumin (solution) Calcium carbonate

I'agc Cholesterol

Creatinine

Cortisol Gallium melting point Glass filters for spectrophotometry

D-Glucose

Iron metal Lead nitrate Liquid filters for spectrophotometry Lithium carbonate Magnesium gluconate D-Mannitol

Metals on quartz filters Potassium chloride Potassium dichromate

Quartz cuvette for spectrophotometry

Quinine sulfate dihydrate

Sodium chloride Thermometers, enzymology

Tris(hydroxymethyl)aminomethane

Tris(hydroxymethyl)aminomethane HC1

Urea

Uric acid VMA

COAL 42

Fly ash, trace elements in Mercury in Sulfur in Trace elements in COATING THICKNESS 55 Copper on steel Gold on copper Gold on copper-clad glass-epoxy laminate Gold on Fe-Ni-Co glass sealing alloy Gold on nickel Nickel on brass Nickel on steel Tin on steel COBALT

Metallo-organic compound 46

Radioactivity 67

See, Alloys

COLOR STANDARDS 74 COPPER

"Benchmarks" (chips) 27 "Benchmarks" (solids) 32

Beryllium copper alloys 31 BrassAluminum 31 Cartridge 31 Free cutting 31 Naval 31 Red 31 Sheet 26 Bronze Commercial 31 Leaded tin 26

Silicon 26 Coating thickness 55 Concentrate 47 Cupro-nickel (chips) 26 Cupro-nickel (solids) 31 Freezing point 61 Gilding metal 31 Isotopic reference 53 Linear thermal expansion 63 Metallo-organic compound 46 Microprobe (gold-copper wires) 37

Mill heads 47

Mill tails 47

Nickel silver alloy 26

89
Page DENSITY STANDARDS

Neutron density wire 53 Photographic 75 Smoke density, flaming 76 Smoke density, non-flaming 76

2,2,4-trimethylpentane 60 X-ray 75 DEXTROSE (Glucose) 38 L2-DICHLOROETHANE ON CHARCOAL 44 DIELECTRIC 72 Cyclohexane

1 ,2-dichloroethane Nitrobenzene DIFFERENTIAL THERMAL ANALYSIS 80 p-DIOXANE ON CHARCOAL 44 ENVIRONMENTAL STANDARDS

Gases 41 Liquids 42

Radioactivity 69

Solids 42 ELASTICITY 59 ELECTRICAL RESISTIVITY 58, 72 EMITTANCE 66 FELDSPARS 48 Soda

Potash FERRO- (STEELMAKING ALLOYS) 23 Chromium

Niobium

Phosphorus

Silicon FERTILIZER

Ammonium dihydrogen phosphate 46 Phosphate rock 47 Potassium dihydrogen phosphate 46 Potassium nitrate 46 FILTERS 66

Glass for spectrophotometry

Liquid for spectrophotometry

FISSION TRACK GLASSES 53 FLAMMABILITY STANDARDS 75 Flame spread index (hardboard sheet) Smoke density, flaming

Smoke density, non-flaming

See also. Special Reference Materials FLUORINE IN URINE 44 FLUORSPAR 47 Assay

Geological

FORENSIC STANDARDS 45

Glass, refractive index

Silicone liquids, refractive index FREEZE DRIED URINE 44

Fluorine Mercury

FREEZING POINT STANDARDS 61 Defining fixed points Tin

Zinc Determined reference points

Aluminum

Copper

Lead Mercury

Tin Zinc FUELS (see, environmental)

Isooctane 72 n-Heptane 72 GALLIUM

Melting point 61

GAS TRANSMISSION

Polyester plastic film for oxygen 71 GASES, ANALYZED 41 Carbon dioxide in nitrogen

Carbon monoxide in air Carbon monoxide in nitrogen

Methane in air Methane-propane in air Nitric oxide in nitrogen

Nitrogen dioxide permeation device Oxygen in nitrogen

Propane in air Sulfur dioxide in nitrogen

Sulfur dioxide permeation tubes GASES IN METALS 35 "GASOLINE"

Lead in 42

Fuel ratings 72 GEOLOGICAL 47 Fluorspar

GLASS

Chemical composition 49

Filters for spectrophotometry 66

Fission track 53

Physical properties 58

Refractive index 45 Spheres for sieve calibration (sizing standards) 74

Stress-optical coefficient 59 Trace elements in 50 GLUCOSE (Dextrose)

Clinical 39 Primary chemical 38 GOLD

Coating thickness 57 on epoxy

on Fe-Ni-Co glass sealing alloy on nickel High-purity 36 Microprobe 37 Vapor pressure 62 HEAT STANDARDS 61 Calorimetric Freezing points

Melting points

Superconductive fixed points Thermal conductivity Thermal expansion

Thermocouple materials Vapor pressure HEAT SOURCE 62 Zirconium-bariumchromate HIGH-PURITY METALS 36 Gold, wire and rod

Platinum, wire Zinc HIGH TEMPERATURE ALLOYS 22 HYDROCARBON BLENDS 45 HYDROGEN

in steel (GM-1, GM-2) 79

in titanium 35

Radioactivity 67 INDUSTRIAL HYGIENE 44 Benzene

Beryllium/filter Carbon tetrachloride Chloroform

1,2-Dichloroethane

p-Dioxane

Fluorine in urine Mercury in urine

Metals/filter

90
Page Quartz/ filter Trichloroethylene

m-Xylene

ION-ACTIVITY 54

Ion-selective electrodes pD standards pH standards IRON

Chip form 24

Electrical resistivity 72 Metallo-organic compound 46

Ores 47

Radioactivity 67

Solid form 24 Thermal conductivity 63 IODINE

Radioactivity 67 ISOTOPIC REFERENCE STANDARDS ... 53 Boron, natural Boron, enriched Bromine

Chlorine Chromium

Copper

Lead, equal atom (206/208) Lead, natural Lead, radiogenic, 92% lead-206 Lead-206, spike

Magnesium

Rhenium

Rubidium

Silicon

Silver Strontium Uranium-235, spike

KRYPTON

Radioactivity 67 LEAD

Alloys 28, 33 Bearing metal 28, 33

Freezing point 61 Gasoline 42

Isotopic reference 53 Metallo-organic compound 46

Nitrate, clinical 39 Solder 28, 33 LIGHT SENSITIVE STANDARDS 75 Faded paper strips Light sensitive papers

Light sensitive plastic chips

LIMESTONE 48

Argillaceous Dolomitic LINERBOARD FOR TAPE ADHESION

TESTING 76 LIQUIDS, ANALYZED

Lead in gasoline 42

Nickel and vanadium in residual oil 79

Sulfur in residual fuel oil 42

Sulfur in distillate fuel oil 42 LITHIUM

Metallo-organic compound 46

Ores 47 LOW ALLOY STEELS

Chip form 14 Solid form 18 MAGNESIUM

Alloy 28 Gluconate, clinical 39

Isotopic reference 53 Metallo-organic compound 46

Page MAGNETIC

Susceptibility 64 Tape, computer amplitude reference 73 MAGNIFICATION STANDARD 55 MAGANESE

Fluoride, magnetic susceptibility 64 Metallo-organic compound 46 Ore 47 MARAGING STEEL 22 MERCURY

Freezing point 61 Metallo-organic compound 46

Radioactivity 67 Trace element in coal 42 Trace element in urine 44 Trace element in water 42 MELTING POINTS 61 Alumina

Gallium METALLO-ORGANIC COMPOUNDS 46 Aluminum

Barium Boron Cadmium

Calcium Chromium

Cobalt Copper

Iron Lead

Lithium Magnesium

Manganese

Mercury

Nickel Phosphorus

Potassium

Silicon

Silver Sodium

Strontium

Tin Vanadium

Zinc METALLURGICAL STANDARDS 71 Austenite in ferrite Iron carbide in ferrite METALS

Alloys-see index entry Elements-see index entry Freezing points 61 Gas-in 35 High-purity 36 Melting points 61 Microprobe 36

Resistivity, electrical 72 Thermal conductivity 63 Vapor pressure 62 METALS ON FILTER MEDIA 44

Beryllium

Cadmium

Lead Manganese

Zinc MICROCHEMICAL STANDARDS 38

Acetanilide

Anisic acid Benzoic acid o-Bromobenzoic acid m-Chlorobenzoic acid Cystine

91
Page p-Fluorobenzoic acid Nicotinic acid Triphenyl phosphate

Phosphate

Urea MICROCOPY RESOLUTION TEST

CHARTS 75 MICROPROBE STANDARDS 36

Cartridge brass Glasses for microanalysis 77 Gold-copper

Gold-silver Iron-3% silicon Tungsten-20% molybdenum

MINERALS 48

Clays

Flint Plastic Feldspar Potash Soda

Limestone

Agrillaceous Dolomitic Ores 47

Bauxite Copper

Fluorspar

Iron Lithium Molybdenum

Phosphate rock Tungsten

Zinc MOLECULAR WEIGHT 60

Polyethylene

Polystyrene

MOLYBDENUM

Concentrate (ore) 47 Heat capacity 62 Microprobe 37 MOSSBAUER STANDARDS 71 NEUTRON DENSITY MONITOR WIRE

Cobalt in aluminum 53 NICKEL

Alloys

Chip form 28

Solid form 33 Coating thickness 55 on brass on steel Fuel oil 79 Metallo-organic compound 46 Oxides 29

Radioactivity 67 NIOBIUM

Radioactivity 67 NITRIC OXIDE

In nitrogen 41 NITROGEN IN 35 Cast iron Ingot iron

Steel Titanium Zirconium NONFERROUS ALLOYS 25 NUCLEAR MATERIALS 52 Neutron density monitor wire Plutonium assay Plutonium isotopic Uranium assay Uranium isotopic

Page OIL

Nickel and vanadium in 79

Sulfur in 42 Trace elements in 42 ORES 47

Bauxite Copper

Fluorspar

Iron Lithium Molybdenum

Phosphate rock Tungsten

Zinc OXALIC ACID

Radioactivity 67 OXIDIMETRIC 38

Arsenic trioxide Potassium dichromate Sodium oxalate OXIDES

Iron 47

Nitrogen 29 Titanium 48 Uranium 38 Zinc (rubber compounding) 73 OXYGEN IN 35

Ingot iron Nitrogen

Steel Titanium Zirconium PAINT, LEAD-BASED 42 PAPER 75 Faded strips Light sensitive PARTICULATE, URBAN 42 PERMEANCE, WATER VAPOR 76 PERMEATION TUBES 43 Nitrogen dioxide

Sulfur dioxide PERMITTIVITY 72 pD STANDARDS 54 Disodium hydrogen phosphate

Potassium dihydrogen phosphate

Sodium bicarbonate Sodium carbonate pH STANDARDS 54 Acid potassium phthalate Borax Disodium hydrogen phosphate

Potassium dihydrogen phosphate

Potassium hydrogen tartrate Potassium tetroxalate Sodium bicarbonate Sodium carbonate

Tirs( hydroxy methyl)aminomethane

Tris( hydroxy methyl)aminomethane HC1

PHOSPHATE

Ammonium dihydrogen 46 Potassium dihydrogen 46

See, pH standards Rock 47 PHOSPHORS 78 PHOSPHORUS

Ferro (steelmaking alloy) 23

Metallo-organic compound 46 PHOTOGRAPHIC 75 Microcopy resolution test chart Step tablets PLASTIC (See, Polymer)

Cellular 79

92
Page Polyester film for oxygen transmission 71 PLATINUM

Doped, wire 36

High-purity, wire 36 Magnetic susceptibility 64 Thermoelement 63 PLUTONIUM 52 Metal assay Standard matrix

Sulfate tetrahydrate

POLONIUM 67

Radioactivity

POLYESTER PLASTIC FILM 71 POLYETHYLENE 60 POLYMER

Molecular weight 60 Oxygen transmission 71 Permittivity 72 POLYSTYRENE 60 POTASSIUM

Acid phthalate 38, 54 Chloride (clinical) 39 Dichromate (clinical) 39 Dichromate (oxidimetric) 38

Iodide (spectrophotometric) 65

Metallo-organic compound 46

See, Fertilizer See, Iron activity POWDER DIFFRACTION STANDARDS 71 a-alumina Cerium oxide Chromium oxide

Rutile

Silicon Zinc oxide PRIMARY CHEMICALS 38 Arsenic trioxide Benzoic acid Boron

Dextrose Plutonium metal Plutonium sulfate tetrahydrate Potassium chloride Potassium dichromate

Potassium acid phthalate

Rubidium chloride Sodium oxalate Strontium carbonate Sucrose Tris(hydroxymethyl)aminomethane

Uranium metal Uranium oxide PROMETHIUM

Radioactivity 67 PROPANE 41 QUARTZ

a - for HF solution calorimetry 62

Cuvette for spectrophotometry 65

Filter media, on 44 RADIOACTIVITY STANDARDS 67

Alpha-particle

Beta-particle and gamma ray gas

Beta-particle, gamma-ray, and electron-capture solutions Contemporary standard for carbon-14 dating laboratories Environmental Gamma-ray "point-sources"

Mixed radionuclides Radium gamma-ray solutions Radium solutions for radon analysis

Page RADIUM

Radioactivity 67 RADON

Radioactivity 67 REFRACTIVE INDEX 67

Glass

Silicone liquids 2,2,4-Trimethylpentane Toluene REFRACTORY MATERIALS 49 RESEARCH MATERIALS 77 Aluminum ultra purity Copper heat capacity Glass for microanalysis

Phosphors

River sediment Tuna, Albacore RESISTIVITY 72

Electrical Silicon RHENIUM

Isotopic and assay 53 RUBBER 73 RUBBER COMPOUNDING 73 RUBIDIUM

Isotopic 53 SAPPHIRE

Enthalpy and heat capacity 62 Thermal expansion 63 SEDIMENT

Estuarine 42

River, environmental 42

River, radioactivity 67 SELENIUM

Metal 29

Radioactivity 67 SILICON

Ferro (steelmaking alloy) 23

Isotopic 53 Metallo-organic compound 46

Refractories (SiC»2) 49

Resistivity 72 X-ray diffraction, powder 71 SILICONE LIQUIDS (refractive index) 67 SILVER

Alloys (microprobe) 37

Isotopic reference 53 Metallo-organic compound 46 SIZING STANDARDS 74

Calibrated glass spheres Turbidimetric and fineness (cement) SMOKE DENSITY CHAMBER

STANDARDS 76 SODIUM

Bromide (isotopic) 53 Metallo-organic compound 46

Oxalate 38

Radioactivity

See, Ion-activity SOLDER

Chip form 28

Solid form 33 SOLIDS, ANALYZED 42 SPECTROPHOTOMETRIC STANDARDS 65 Didymium-oxide glass filters Glass filters Liquid filters Metal on quartz filters Potassium dichromate

Potassium iodide (stray light) Quartz cuvette

93
Quinine sulfate dihydrate

STAINLESS STEEL

Chip form 14

Resistivity 72

Solid form 20 STEELMAKING ALLOYS 23 Calcium molybdate

Ferrochromium

Ferroniobium

Ferrophosphorus

Ferrosilicon

Silicon, refined STEEL, THERMAL CONDUCTIVITY 63 STEELS, CAST 25 STEELS, CHIP FORM 14 High alloy Low alloy Low alloy, special Plain carbon

Stainless Tool STEELS, GAS-IN 35 STEELS, GRANULAR FORM 17 STEELS, SOLID FORM 17 Cast High temperature alloy Low alloy Low alloy, special Maraging

Oxygen

Stainless Tool STEP TABLETS 75 Photographic

X-ray

STRONTIUM

Isotopic reference 53 Metallo-organic compound 46

Radioactivity 67 SUCROSE 38 Primary chemical SULFUR

Elemental (rubber compounding) 73

in residual fuel oils 42

in coal 42 SUPERCONDUCTIVE THERMOMETRIC

FIXED POINT DEVICES 61 SURFACE FLAMMABILITY 75 TAPE, MAGNETIC-SECONDARY

REFERENCE 73

Cartridge

Cassette Reel TEMPERATURE (See, HEAT

STANDARDS)

Calorimetry 61 Differential thermal analysis 80 Heat source 62 THERMAL CONDUCTIVITY 63 THERMAL EMITTANCE STANDARDS 66 THERMAL EXPANSION 63 THERMOCOUPLE MATERIALS 63 THERMOMETERS 39 THORIUM

Radioactivity 67 TIN

Chip form 29 Coating thickness 55 Freezing point 61 Metallo-organic compound 46 TITANIUM

Page Chip form 29 Dioxide 48

Gases-in 35 Metallo-organic compound 46

Solid form 33 Unalloyed for oxygen 35 TRACE ELEMENTS

Biological matrices 39 Environmental 41 Fuels 42

Glass matrices 50

Metallo-organics 46 TRICHLOROETHYLENE ON

CHARCOAL 44 TUNGSTEN

Carbide 50 Concentrate 47

Electrical resistivity 72 Microprobe 37 Thermal conductivity 63 Thermal expansion 66 TURBIDI METRIC AND FINENESS

STANDARD 74 URANIUM 52

Isotopic and assay 52, 53 Metal Oxide

Depleted

Enriched Primarv standard 38 VANDIUM

Fuel oil, in 79 Metallo-organic compound 46 VAPOR PERMEANCE, WATER 76 VAPOR PRESSURE STANDARD 62 VISCOSITY STANDARDS

Glass 59 WATER, TRACE ELEMENTS IN 42 WATER VAPOR PERMEANCE 76 m-XYLENE ON CHARCOAL 44 X-RAY STEP TABLET 75 X-RAY DIFFRACTION 71 Silicon powder

YTTRIUM

Radioactivity 67 ZINC

Chip form 30 Concentrate, ore 47

Freezing point 61 High purity 36

Intermediate purity 36 Metallo-organic compound 46 Oxide (rubber compounding) 73

Solid form 34

Spelter modified 34 ZIRCONIUM

Chip form 30

Solid form 34

94
NUMERICAL INDEX TO SRM CERTIFICATES

The Certificate Date listed is the current version of the Certificate. Those dates followed by the

letter "P" indicate that it is a Provisional Certificate. In general, Provisional Certificates are issued for Standard Reference Materials before all of the values have been certified, but after a sufficient number of values are certified so that the material is a valuable standard for the intended purpose. As additional values are certified, the Provisional Certificate may be revised and when and if all of the values are certified, the final Certificate is issued. When new or revised Certificates are issued for SRM's they are announced in the SRM Price and

Availability List which supplements this catalog. SRM purchasers whose Certificate shows an earlier date

than listed below may obtain the current version of the Certificate from the Office of Standard Reference

Materials, Room B311, Chemistry Building, National Bureau of Standards, Washington, D.C. 20234.

One or more of the following letters apply to materials where no date is listed.

A. Individually Certified

B. The Material is issued with "Instructions for Use" in lieu of a Certificate. C. This Material is not certified, refer to page reference for details. D. Material is in preparation.

E. Research Material: Issued with a "Report of Investigation."

F. Special Reference Material: Information provided, but not certified by NBS.

G. Set of SRM's: Issued with Certificates for the individual SRM's.

95
Certificate SRM Date Pa t?e

Ic

D 48

3c 3-17-76 24

4k 5-27-76 24 5L 1 1-9-70 24 6g 1 1-9-70 24

7g 10-5-59 24

8j 4-10-72 14 1 lh 4-30-74 14 12h 3-7-66 14 I3g 4-30-74 14

14e 11-9-65 14 15g 4-30-74 14

I6e 4-30-74 14 17a 12-26-67 38 19g 9-30-64 14 20g 10-23-70 14 27f 5-31-77 47

30f 12-23-66P 15 32e 4-5-57 15 33d 6-10-55 15 36b 7-18-69 15 37e 8-28-58 26

39i 7-15-68 62 40h 4-24-69 

38 41b 4-10-75 38 42g 7-18-72 61 43h 8-15-73 61 44f 4-5-73 61 45d 12-6-71 61 49e 12-6-71 61 50c 6-25-57 16 53e 1-20-70 28 54d 9-20-57 29

57 2-7-73 23 58a 4-25-78 23 59a 11-6-69 23 64c 8-24-77 23

65e

D 14 69 b D 47 70a 3-26-65 

48

71 2-1-29 23 72g D 15 73c 7-13-66 16 76a 4-5-77 49

77a 4-5-77 49

78a 4-5-77 49 79a 12-6-71 47

81a 1-78 48 82b 4-12-66 24 83c 4-1 6-70 

38 84h 7-9-69 38 85b 5-9-57 25 87a 11-17-69P 25 88a 1-31-67P 48

89 8-27-32 49

90 10-1-28 23

91 6-15-31 49

92 4-30-7 IP 49 93a 8-31-73 49

94c 8-15-73 30 97a 10-8-69 4K 98a 10-8-69 4X 99a 3-26-65P 4X 100b 8-18-59 15 10 1 f 5-19-70 16 103a 9-28-62 49

105 4-22-37 P 15 106b 3-24-61 15

Certificate SRM Date

r age 107b 1 1-1-62 24 1 13a 12-29-75 47 1 14m 4-15-73 74 1 15a 4-19-62 24

120b 7-31-72 47 1 2 1 d 7-7-7 IP 16 122f 10-1-75 24

123c 7-7-7 IP 16 125b 4-10-70 15 126c 1 2-30-77 16 127b 1-25-68P 28

129c 8-7-73 15 131c 6-2-77 15 132b 8-16-73 16 133a 6-8-56 16 134a 5-6-57 16 136c 3-24-70P 38

139b 5-17-78 15 140b 4-16-70 38

141c 9-27-76 38

142 7-9-69 38 143c 9-27-76 38

147 7-9-69 38

148 12-22-70 38

152a 10-1 1-65 14 153a 1-5-60 16 154b 5-16-73 48

155 10-1-46 15 158a 8-8-61 26

160b 8-4-69P 16 163 1-11-68 16 165a 10-16-78 48

166c 3-17-70 16 168a D 26

171 11-27-51 28

173a 4-25-66P 29

174 8-20-70P 29

176 8-20-70 29

178 7-14-69 14 179 6-15-76 15 180 3-31-71 47

181 8-20-70 P 47

182 8-20-70 

47

183 8-20-70P 47

184 2-26-73 26

185e 5-23-73 54

1861c 9-1-70 54

18611c 9-1-70 54 187b 9-9-70 54

188 1-10-64 54

189 1-10-64 54

191 7-15-68 54

192 7-15-68 54

193 1 1-14-74 46

194 1-8-74 46

195 1-7-76 23

196 11-9-70 23

198 1-6-60 49

199 1-6-60 49 200 8-7-74 46

211c

D 60, 62, 67 217c D 60, 62, 67 276a D 50 277 10-24-78 47

291 10-1-75 15 293 3-27-75 15 329 12-29-75 47

330 1-20-77 47

96
Certificate SRM Date Page

331 1-20-77 47 332 6-26-77 47 333 1-20-77 47

335 4-7-66 14 336 6-19-73 14 337 8-16-66 14 339 7-21-65 16 340 11-9-70 23

341 3-26-62 24 342 1-5-62 24 342a 4-27-70 24 344 10-2-63 16 345 1-23-64 16 348 1-17-66P 16 349 5-15-59P 28 350 4-15-58 38 352a D 35 354 8-7-61 35 355 9-8-66 35 356 9-8-66 35 358 D 23 360a 1-30-67 30

361 1-8-76 15 362 1-8-76 15 363 1-8-76 15 364 1-8-76 15 365 7-5-77 24 367 7-21-77 16 368 1-1-78 14 370e C 73 371g C 73 372h c 73 373f c 73 374c c 73 375g c 73 378b c 73 379 c 73 382a c 73 384c c 73 385b 8-15-67 73 386h 3-10-75 73

388j 1-2-78 73 392 C 73 393 D 27 394 7-4-76 27 395 7-4-76 27 396 7-4-76 27 398 1-23-78 27 399 1-23-78 27 400 1-23-78 27 404a 5-5-65 18 405a 5-5-65 18 407a 5-5-65 18 408a 5-5-65 18 409b 5-5-65 18 413 5-5-65 18 414 5-5-65 18 417a 5-5-65 18 418a 5-5-65 18 420a 5-5-65 18 427 5-5-65 18 436 9-22-59 23 437 9-22-59 23 438 9-22-59 23 439 9-22-59 23 440 9-22-59 23 441 9-22-59 23 442 10-25-65 20

Certificate SRM Date Page

443 10-25-65 20 444 10-25-65 20

445 1-19-66 21 446 1-19-66 21 447 1-19-66 21 448 1-19-66 21 449 1-19-66 21 450 1-19-66 21 454 D 27 457 1-20-78 32

461 5-5-65P 19 462 5-5-65 

19 463 5-5-65P 19 464 5-5-65P 19 465 5-5-65P 19 466 5-5-65P 19 467 5-5-65P 19 468 5-5-65P 19 478 2-28-74 36, 37 479 D 37 480 11 -22-68 P 37 481 2-14-69 37 482 6-6-69 37 483 6-11-71 37 484a D 55 485a D 71 488 D 71 493 8-28-70 71 494 1-20-78 32

495 1-20-78 32 496 1-20-78 32

498 1-20-78 32 499 1-20-78 32 500 1-20-78 32

593 4-1-61 45 596 4-1-61 45 597 4-1-61 45

599 4-1-61 45 607 5-21-73 51 608 G 51 609 G 51 610 8-8-72P 51 611 8-8-72P 51 612 8-8-72P 51 613 8-8-72P 51 614 8-8-72P 51 615 8-8-72P 51 616 8-8-72 

51 617 8-8-72P 51 618 G 51 619 G 51 620 5-17-72P 49

621 3-13-75 49

622 3-19-76 58 623 3-19-76 58 624 10-25-77 58 625 4-24-64 34 626 4-24-64 34 627 4-24-64 34 628 4-24-64 34 629 4-24-64 34 630 4-24-64 34

631 4-16-70P 34 633 2-24-77 50 634 2-24-77 50 635 2-24-77 50 636 2-24-77 50 637 2-24-77 50

97
Certificate SRM Date Page

\J JO 2-24-77 50 639 2-24-77 50 640 8-7-74 71 IHI 1 -26-60 P 33 1 -26-60 P 33 643 1-26-60 

33 644 1 -26-60 P 33 645 1 -26-60 P 33 646 1 -26-60 

33

rj 29 65 

29 652 I) 29 654a 3-22-7 1 

33 661 H(8-15-72P1 19 662 H(8-15-72P) 19 663 KN2-12-73P) 19 664 H(2-l 2-73P) 19 665 H(2-l 2-73) 19 668 Q 19 U / 1 9-12-60 29 672 9-12-60 29

673 9-12-60 29 674 rj 7 i 680a 3-1-77 36 68 

3-1-77 36 682 2- 1 -7 1 

36 683 7-9-68 

36 685 9-26-68 P 36 690 47

691 47

692

D 47

693 47 696 47 697 47

698 47 700d B 75 701d 1-15-77 75

702 11-1 -66 75

703 11-1 -66 75 705 1 1-28-78 60, 62 706 1 1 n Ha tpH 60

707 1-17-72 76

708 9-15-73 5K 709 6-5-74 58 710 6-29-62 5X 7 | i 7-1-64 58 7 1 7 10-4-65 58 713 10-4-65 58 714 10-4-65 58 7 1 

9-7-66 58 l IU 9-7-66 58 7 1 7 1 1-18-69 5X 718 4-28-72 59 720 8-26-70 62 723 7-14-70 38 724a 9-24-73 62 725 3- 1-7 IP 7 i 796 1 -3 1 -67 29 798 7-9-68 30 7^n 5-18-76 63 7 1 1 7-31-72 61 IV) 10-3-77 63 7"U 12-30-71 63 714 4-29-75 61 715 3-5-75 63 736 8-5-75 63 737 5-19-76 63 738 D 63

Certificate SRM Date Page

739 5-12-71 740 2-19-70 61U 1 741 7-18-72 61 742 6-5-70 61 743 4-22-76 61 745 5-14-69 62

746 8-1 1-70 62

748 8-10-70 62

763 4-5-73 64

764 4-5-73 64

765 4-5-73 64 766 4-5-73 64

767 6-5-74 61 768 D 61 772 7-1 1-78 64

781 4-1-77 62 797 4-29-75 72 798 3-4-75 72 799 2-27-76 72 803a 5-5-65 18 D803a 5-5-65 118o 804a 5-5-65 18 805a 5-5-65 18 807a 5-5-65 18 D807a 5-5-65 18 808a 5-5-65 18 809b 5-5-65 18 817a 5-5-65 18 820a 5-5-65 18 D820a 5-5-65 18 821 5-5-65 18 827 5-5-65 18 8^7 O J / 9-22-59 23 D817 9-22-59 23

LSOJO 9-22-59 23 840 9-22-59 23 L/OW 9-22-59 23 D841 9-22-59 23 849 1-19-66 21 D840 1-19-66 21 850 1-19-66 21 D850 1-19-66 21 855 D 26 856 D 26

857D 26

858 26

859 26

871 26

877

D 26 874 1-19-78 26

875 1-19-78 26 879 26 880 OOv 26

882 j> 28 897 28 070 808 D 28 800 n1 7 28 ODD 39 911a 1 1-1-74 39 0 1 ~> 1 1-21-73 39 913 1 1-23-73 39 914 1 1-28-73 39 915 1 1-21-73 39 916 3-10-71 39 9 1 

9-20-73 39 918 11-23-73 39 919 11-23-73 39 920 11-23-73 39

98
Certificate SRM Date Page

921 12-16-73 39 922 8-20-76 39, 54 923 8-20-76 39, 54 924 11-23-73 39 925 12-26-73 39 926 7-18-77 39 927 7-18-77 39 928 5-19-76 39 929 D 39 930D A(8-l-77) 39, 65 931b 11-10-77 39, 65 932 A(8-2-78) 39, 65 933 A( 10- 1-74) 39 934 A( 10-23-74) 39 935 6-1-77 39, 65 936 9-1-78 39, 65 937 6-9-78 39 944 2-14-69 38, 52 945 4-6-71 52 946 12-3-7 IP 52 947 12-3-7 IP 52 948 9-1-72P 52 949e 10-1-75 38, 52 950b 3-1-78 38, 52

951 10-12-71 38, 53 952 10-12-71 53 953 3-12-69 53 955 D 52 960 5-12-72 38, 52

961 6-11-74 53 962 6-11-74 53 963 6-11-74 53 964 6-11-74 53 975 3-11-65 53 976 3-24-65 53 977 3-24-65 53 978 3-24-65 53 979 5-3-66 53 980 1-31-67 53 981-3 4-10-73 53 984 7-27-70 38, 53 987 3-6-72P 38, 53 989 2-19-74 53 990 8-75 53 991 3-19-76 53 993 6-30-75 52, 53 999 9-6-72 38

1001 A(8-14-78) 75 1002c 12-13-78 75 1003 7-1-65P 74 1004 4-3-72 74 1006a D 76 1007a 2-27-76 76

1008 A(8-18-78) 75 1009 A(8-18-78) 75 1010a 8-12-78 75 1017a 9-24-71 74 1018a 5-16-73 74 1019a D 74

1020 E 78

1021 E 78 1022 E 78 1023 E 78 1024 E 78 1025 E 78 1026 E 78

1027 E 78 1028 E 78

SRM

Certificate Date Page

1029 E 78

1030 E 78 1031 E 78

1032 E 78

1033 E 78 1051b 7-15-68 46

1052b 3-1-68 46

1053a 1-23-70 46

1055b 7-23-68 46

1057b 8-5-68 46

1059b 7-15-67 46

1060a 4-24-64 46

1061c 9-9-70 

46

1062b 4-12-76 46

1063a 4-24-64 46

1064 4-24-64 46 1065b 11-1-67 46

1066a 4-23-69 46

1069b 2-13-69 46

1070a 4-24-64 46 1071b 2-26-76 46 1073b 7-15-67 46

1074a 5-13-66 46

1075a 10-25-67 46

1076 4-24-64 46

1077a 2-10-68 46 1078b 7-25-72 46

1079b 2-26-69 46

1080a 2-26-69 46

1089

G 35

1090 4-2-69 35

1091 4-2-69 35 1092 4-2-69 35

1093 3-4-69P 35 1094 6-1 2-69 

35

1095 H( 10-23-70) 35 1096 H(6- 13-72) 35 1097 H(5-26-72P) 35

1098 H( 10-3-73) 35 1099 H(7-28-70P) 35

1101 7-31-64P 31 CI 101 7-31-64P 31 1102 7-31-64P 31 CI 103 8-13-65 31 1104 8-13-65 31 CI 104 8-13-65 31 CI 105 8-13-65 31 1106 11-17-69P 31 CI 106 U-17-69P 31 1107 11-17-69P 31 C1107 11-17-69P 31 1108 11-17-69P 31 CI 108 11-17-69P 31 1109 7-1 4-65 

31 CI 109 8-18-70P 31 1110 8-18-70P 31 CI 1 10 8-18-70P 31 1111 8-18-70P 31 Cllll 8-18-70P 31 1112 1-17-69P 31 CI 1 12 1-17-69P 31 1113 1-17-69P 31 CI 113 1-17-69P 31 1114 1-17-69P 31 CI 1 14 1-17-69P 31 1115 2-19-70P 31 CI 1 15 2-1 9-70 

31 1116 2-1 9-70 

31

99
SRM

Certificate Date Page CI 1 16 2-19-70P 31 1117 2-1 9-70 

31 CI 1 17 2-1 9-70 

31 1 1 18 7-1 4-65 

3 | CI 1 18 2-26-70P 31 1 1 19 7-1 4-65 

31 C1119 2-26-70P 31 CI 120 2-26-70 

31 1 121 12-19-66P 31 CI 121 12-19-66P 31 1122 1 2-1 9-66 

31 CI 122 1 2-1 9-66 

31 1123 12-19-66P 31 CI 123 12-19-66P 31 1131 1-25-68P 33 1 132 1-30-70 33 1 134 4-30-70 19 1 135 7-27-72 14 1136 8-31-73 19 1 138 7-13-70 25 1 139a 1-20-77 2? 1 140b D 25 1 141b 1) 25 1 142b D 25 1 143a 12-1-76 25 1 144a 12-1-76 25 1 145 5-16-78 25 1 146 5-16-78 25 1150 5-16-78 25 CI 15 

D 21 1151a D 21 1152 2-9-66 21 CI 152 D 21 1152a [) 21 CI 1 53 D 21 1153a D 21 CI 154 I) 21 1154a D 21 1155 8-4-69 

21 1156 4-5-66P 22 1 157 8-6-73 23 1 158 12-30-77 22 1 159 2-18-69P 33 1 160 2-18-69P 33 1 166 5-5-65P 19 1 169a 5-5-78 19 1 170a 2-2-74 21 1171 7-7-7 IP 21 1172 7-7-7 IP 21 1185 2-4-59P 21 1 198 H(8-17-74) 22

1199 H(8-17-74) 22 1200 H(8-17-74) 22

1201 H(8-17-74) 22

1206-2 1-16-73 22 1207-1 1-16-73 22

1207-2 1-16-73 22 1208-1 1-16-73 22 1208-2 1-16-73 22

1212a 5-6-74 34 1222 8-21-78 \9 1234 D 34

1235 i) 34 1236 I) 34

1237 I) 34 1238 I) 54 1239 I) 34

1251

D 32

Certificate SRM Date Page

1252

D 32

1253

D 32 C1255 D 30 CI 256 D 30 1257 D 30 1258 5-3-78 30 1259 5-3-78 30

1261 1-8-76 19 1262 1-8-76 19 1263 1-8-76 19 1264 1-8-76 19 1265 8-15-72 19 1267 1-19-76 21 1275 D 31 1276 D 31 1301a A 55 1302a A 55 1303a A 55 1304a A 55 1305a A 55 1306a A 55 1307a A 55 1308a A 55 1310a A 55 1311a A 55 1312a A 55 1313a A 55 1314a A 55 1351a A 55 1352a A 55 1353a A 55 1361a A 55 1362a A 55 1363a A 55 1364a A 55 1365a A 55 1366a A 55 1367a A 55 1370a A 55 1384a A 55 1398a A 55 1399a A 55 1402 4-1 1-66 66

1403 4-11-66 66

1404 4-11-66 66

1405 4-11-66 66

1406 4-1 1-66 66

1407 4-11-66 66

1408 4-11-66 66

1409 4-11-66 66

1420 12-16-65 66

1421 12-16-65 66

1422 12-16-65 66

1423 12-16-65 66

1424 12-16-65 66

1425 12-16-65 66

1427 12-16-65 66

1428 12-16-65 66

1440 12-16-65 66

1441 12-16-65 66

1442 12-16-65 66

1443 12-16-65 66

1444 12-16-65 66

1445 12-16-65 66

1450 5-26-78 64

1470 1-78 71 1475 12-2-71 60, 62

1476 11-6-69 60

100
Certificate SRM Date Page

1482 10-18-76 60

1483 3-9-76 60

1484 10-18-76 60

1490 2-21-77 60

1511 4-24-69 72

1512 7-2-69 72 1513 9-17-69 72 1516 7-9-69 72

1517 7-9-69 72

1518 7-9-69 72

1519 7-9-69 72 1520 A( 1-8-74) 72

1521 A(4-12-78) 72

1541 3-1-71 

71 1566 D 39 1567 1-3-78 39 1568 1-3-78 39 1569 9-7-76 39 1570 9-1-76 39

1571 8-31-77 39

1573 10-18-76 39

1575 10-18-76 39

1577 6-14-77 39 1579 1-23-73 42

1600 A(3-22-74) 73 1609 A(3-l-68) 41 1620 D 42

1621 12-11-67 42

1622aD 42 1623a D 42

1624 4-7-71 42

1625 A( 1-5-73) 43

1626 A(8-12-71) 43

1627 A(8-12-71) 43

1629 A(3-ll-75) 43

1630 11-31-71 42

1632a 1-23-78 42 1633a D 42

1634 5-14-75 42

1635 1-23-78 42

1636 7-14-78 42

1637 7-14-78 42

1638 7-14-78 42

1641a

D 42 1642a 8-24-77 42

1643a

D 42

1645 1 1-16-78 42

1646

D 42

1648 1 1-16-78 42

1651 1 1-12-68 62

1652 11-12-68 62

1653 1 1-12-68 62

1654 4-7-71 62

1658 A( 12-12-78) 41 1659 A( 12-12-78) 41 1660 A( 12-12-78) 41

1661 A(8-7-78) 41 1662 A(8-7-78) 41 1663 A(8-7-78) 41 1664 A(8-7-78) 41 1665a A( 11-1-75) 41 1666a A(l 1-1-75) 41 1667a A(l 1-1-75) 41 1668a A(l 1-1-75) 41 1669a A(l 1-1-75) 41 1673a A(9-24-75) 41 1674a A( 10-1-75) 41 1675a A( 10-1-75) 41

Certificate SRM Date Page

1677b A(7-18-77) 41 1678b A(9- 17-76) 41 1679b A( 1-24-75) 41 1680a A 4 1 1681a A 41 1683a A(2-20-76) 41 1684a A(5-18-76) 41 1685a A(3-17-76) 41 1686a A(4-26-76) 41 1687a A(4-23-76) 41 1810 5-5-72 76 1815a D 72

1816a

D 72

1820 9-6-74 45, 67

1822D 45, 67

1823 12-9-76 45. 67

1901 3-1-76 74

1902 3-1-76 74

1903 3-1-76 74

1904 3-1-76 74

1967 2-23-77 63

1968 6-77 39, 61 2009 D 65 2010 D 65 2013 D 65 2014 D 65 2030 A(9-23-76) 65 2031 D 65 2032 D 65 2033 D 65 2106 C "4 2107 C ^4 2141 8-28-70 38 2142 9-1-70 38 2143 1-23-73 38 2144 4-5-73 38

21861 5-28-68 54

2186II 5-28-68 S4 2191 5-28-68 54 2192 5-28-68 54 2201 2-22-71 54 2202 2-22-71 54

2203 5-21-73 54 2308a A 55 2318a A 55 2338a A 55 2339a A 55 2601 A(7-7-78) 64

2613 A( 1-1 7-77) 41 2614 A( 1-17-77) 41 2619 8-14-78 41 2620 8-14-78 41 2621 8-14-78 41 2622 8-14-78 41 2623 8-14-78 41 2624 8-14-78 41 2625 8-14-78 41 2626 8-14-78 41 2661a 11-27-78 44 2662 2-23-77 44 2663 2-23-77 44 2664 2-23-77 44 2665 2-23-77 44 2666 2-23-77 44

2667 2-23-77 44

2671 10-1-75 44 2672 2-27-76 44 2675 8-19-75 44

101
SRM

Certificate Date Page

7A7Ao ZO / 03.A 1 2 78 4h

ZO7A7QI 7 Qy-ZH- 74 7A/ 0 44 jZUU A^Ai j-j- S S 7h/ 1 

71 ^216 A/11 1 _7A\ J-J 1 - / U } 71/ J 4700R HZUU D

Ail AQ\ A^ J-U7 ) AQoy 1

~* 1 1 1 11 4-1M I i r\\ A/ A-701 O / U/

D f /rjfrJP HZUZ^. AAM 771 v i-/ / J AQoy 47A1P A/4 711 /\{ H~ / J j AQDV HZUO d A^A M 7 7A1 1 Z- / O) AQoy 4707 HZU / Ail AQl AQoy 474 . 1It!0 /At AfSJ-D7AQl( AQ 47HZ 1 1 1 1 r\\ A( J-S 701 l\J) AQoy

47HZ 1 71 Z A(A 1 \\ AQoy 47HZ 1 1 1 J r\\ AfSJ- 701 l\J ) AQDV 47HZ i1 srO V„ AfS 781 AQoy

/17 HZ 1 Q1 VA0- 74/ H OB 4777 HZZZ o-O 8 A7/ ASDo 477 HZZJ1 o-O 8 A7/ A800 4774 HZZH 8o-OA7/ AS00 4226 8-69 uoA8 4778R HZZo D 4H- 7 1 / 1 Afi 0<S 477Q SJ~ 771 Z AQOiS 47 1 

4H-Z7SJ-71/ 

Do 4714 HZ JH 11 0 7S 

- / J AV 471S A( 1 1 -741 AS 4740 HZHU AfSJ-ZZ- 77 711 / J J AQoy 474S HZHJ J-^ 74/H AS 474A HZHO J-^ 74/H ASOo 4747 HZH /

*\ 74 J- / H ABOo 47HZ soJU I 0 77 ASD^ 47AOR HZOUo A/4 771 AOOy 47HZUA 11 r\\ A/AO- 7A1 / Of AQoy 47A4 HZOH r\\ A(f\0- 11\ II) oyAQ 4107 HJUZ Ai S-7S1 OoA8 4108 A/1 7S1 A8Do 411 

HJ j I 1 7S ASOo

AT. 1 1 11 0 74 VJ- /H ASDo 4iso 4H-7S/ J AQDV 4170 Hj IK) S 78 AS00 4Q04F A/Ill 77 \ l\J-/ / ) AS05 4Q0A J-O7 ^ AQ ASDo 4Q07 H7U / AOZ - 11 Q7 741 / H J OoAS 4QHV 1[ 1 RJ D 7/-7^/ J ASDo 4QHV 11 QF1 y YJ 7 7^ ASOO 4922E A^A 1 5-A71 J U / ) AS00 4Q7S Hy Z J 1 ^8 /-Jo ASDo 4Q7AP uI A ABDo 4Q77 HVZ / DR 1 ' ABOo 4G7QP A0- 7H/u A8Do 4Qisp 7 11 1A l-L j- 1 H 00 4Q40R HVHU D 1 A A8 1 -H-Oo Afi Oo 4Q4 HVH i r» 1 YJ O- 1 

- / J

Afi Do 4Q41 HyHj 11 QA7 VOZ Afi Oo HyH 4Q47/ 7Z- 11 0U-OHA4 A8Do 4Q4Q HVHV Qy-ZH- 74 11/ j

Afi Oo 4950D A(4-78) 70 4QS Hy J 11 PV_ j-S 78/ 0 l\) HyAQ^jZ7 RD u1 i 1 1 4QS1P A(H- A(A 781 / 

) 70

ny jj 1 1 A8 J- 1 -Do 71 

4QSA HV JO 1 ! AS J- 1 -Oo 70l\J 4QS7 Hy J / Ail 1 A81 A^ j- I -Do ) 70 4QS8 47 JO t\\ Ailj- 11 -OoA8\j 70 4QSQ HV JV AAil 1 A8^ 1 . ' - 1 -Oo ) 70 4QA0 A\Ailj-l\ -OoA81}

70 HVO 4QA 11 Ail 1 A81 f\\ J- 1 -Oo J 70 4QA7 HVOZ A^Ail 1 A8* J- 1 -Oo ^ 70

/1GA1A / 1 1 AQ \

A( j- 1 -Do )

701 

4964

B r\\ II -'I \J-J f 70

Certificate SRM Date Page

4990 1 ) AQOo 4991 C

a^A^Sj-oyAQ1) AQOy 4996 B c\\ AfSj-oyAQ1} AOOy U-0002 7/ - JU- 10 70/UrP S7JZ U-005 4H-Z711 -oyAQPr ^7jZ U-010 4H-Z711 -OyAQP

S7JZ U-01 

4H~Z711 U7AQPI s7jZ U-020 4h-z71i -oyAQP

S7jZ U-030 4-71 h-z 1 -oyAQP

S7jZ U-050 4H-Z71I -OyAQP

^7jZ U-100 Ao-z71j-oor AAP ^7jZ

11-1 so o-j-OOr 8 S AAP < 7 JZ 1 1-700 A0TM 11 *OOr AAP ^7jZ 1 1-1S0 j-Z S 71j-OOr AAP ^ 7 JZ IU"JV/U I-SOO J-ZH-OOr S 74 AAP ^7jZ U-750 7Z- 1I II -OOr AAP JZ 1 1-800 7Z- 11 1I -OOr AAP *\7 jZ U-850 7Z-I11I -OOr AAP ^7jZ U-900 7Z- 111 1 -DOAAPr

<\7 JZ U-930 7-1 z,- 1 11 -AAP -our S7JZ U-970 7-Q-70P S7JZ

r\ ivi 1 v„ 77

IX IVI I I\ 77 RIX AA1V1 SJ 77 R M 10 p 111 1 uIX V11V1 J111 p 111 1 RIX M1V1 40HU p 111 1 RIX M1VI 4Sh HJ D AQoy RIX MIVI JSOw p 77 W IVI 1 p 7Qfy O IVI z pr 1Q17 r; vi S vJ ivi J Fr 7Qfy (0\ viivi 71z 1 pr 7Qfy p_Vf U1V1 77zz pr 7Qfy r: vi 71 VJ 1V1 Z J P IQfy r.fu VJ IVI 74ZH PF 7Q/ y p.y VJ IVI 7SZJ P 7Qfy r;vi VJ IV 7A 1 ZD pr 7Q17

r:VJ V1IVI 77z. / pr 7Qf y r.y VJ IVI ZO78 p 7Qfy HMvj ivi zy7Q F 7Q/y

p.VJ VIIVI JU10 PF 7Q/ y r.y VJ IVI J11I PF 7Q/ y r.y VJ IVI j^7z Pr 7Qfy

VJ IVI j J

pF IQfy

r:VJlVl vi JO1A PF IQ17

C,M 77 VJ IVI J / pF IQfy nVJ mivi j>is0 PF IQ17 n\4 vj ivi jyiq F IQfy p.y Aft VJ IVI HO PF IQfy

V.J IVIH I PF

IQfy

CVJ \AIVI 47HZ

pF IQly

r;VJMIVI 41HJ lFIQfy

VJlVl HH

Fp IQfy

VJ IVI 47H / PF IQly

r:\yi vj IVI 48Ho PF IQfy C,\A vj IVI AQny pF IQ1 

C,Vj \AIVI SOJU PF IQfy

P.VJMIVI SIJ 1 pF IQly

(~l\A VJ IVI S7J z p- F IQfy nvi VJ IVI siJ J pF IQly \ I :V I .'4 pF IQ1 

TiVJMIVI S 7 J / F IQ1 

p.VJ VIIVI

Jsx0 pr IQ1 

nvi VJ IVI 7S4 / JHpF 80oU

(~l\A V 7^7 J IVI / J / PF 80 GM 758 F 80 GM 759 F 80 GM 760 F 80

102

ft U. S. GOVERNMENT PRINTING OFFICE : 1979

O - 289-683


NBS TECHNICAL PUBLICATIONS

PERIODICALS

JOURNAL OF RESEARCH—The Journal of Research

of the National Bureau of Standards reports NBS research and development in those disciplines of the physical and

engineering sciences in which the Bureau is active. These

include physics, chemistry, engineering, mathematics, and

computer sciences. Papers cover a broad range of subjects, with major emphasis on measurement methodology, and

the basic technology underlying standardization. Also in- cluded from time to time are survey articles on topics closely related to the Bureau's technical and scientific programs. As

a special service to subscribers each issue contains complete

citations to all recent NBS publications in NBS and non- NBS media. Issued six times a year. Annual subscription:

domestic $17.00; foreign $21.25. Single copy, $3.00 domestic; $3.75 foreign. Note: The Journal was formerly published in two sections: Section A "Physics and Chemistry" and Section B "Mathematical Sciences." DIMENSIONS/NBS

This monthly magazine is published to inform scientists, engineers, businessmen, industry, teachers, students, and consumers of the latest advances in science and technology, with primary emphasis on the work at NBS. The magazine

highlights and reviews such issues as energy research, fire protection, building technology, metric conversion, pollution

abatement, health and safety, and consumer product per- formance. In addition, it reports the results of Bureau pro- grams in measurement standards and techniques, properties of matter and materials, engineering standards and services, instrumentation, and automatic data processing.

Annual subscription: Domestic, $1 1.00; Foreign $13.75

NONPERIODICALS

Monographs—Major contributions to the technical liter- ature on various subjects related to the Bureau's scientific and technical activities. Handbooks—Recommended codes of engineering and industrial practice (including safety codes) developed in cooperation with interested industries, professional organizations,

and regulatory bodies. Special Publications—Include proceedings of conferences sponsored by NBS, NBS annual reports, and other special

publications appropriate to this grouping such as wall charts, pocket cards, and bibliographies.

Applied Mathematics Series—Mathematical tables, manuals, and studies of special interest to physicists, engineers,

chemists, biologists, mathematicians, computer programmers,

and others engaged in scientific and technical work.

National Standard Reference Data Series—Provides quantitative data on the physical and chemical properties of

materials, compiled from the world's literature and critically evaluated. Developed under a world-wide program co- ordinated by NBS. Program under authority of National Standard Data Act (Public Law 90-396).

NOTE: At present the principal publication outlet for these data is the Journal of Physical and Chemical Reference Data (JPCRD) published quarterly for NBS by the American Chemical Society (ACS) and the American Institute of

Physics (AIP). Subscriptions, reprints, and supplements

available from ACS, 1155 Sixteenth St. N.W., Wash., D.C.

20056.

Building Science Series—Disseminates technical information developed at the Bureau on building materials, components,

systems, and whole structures. The series presents research

results, test methods, and performance criteria related to the structural and environmental functions and the durability and safety characteristics of building elements and systems. Technical Notes—Studies or reports which are complete in themselves but restrictive in their treatment of a subject.

Analogous to monographs but not so comprehensive in scope or definitive in treatment of the subject area. Often

serve as a vehicle for final reports of work performed at NBS under the sponsorship of other government agencies.

Voluntary Product Standards—Developed under procedures

published by the Department of Commerce in Part 10, Title 15, of the Code of Federal Regulations. The purpose

of the standards is to establish nationally recognized require- ments for products, and to provide all concerned interests with a basis for common understanding of the characteristics of the products. NBS administers this program as a supple- ment to the activities of the private sector standardizing

organizations.

Consumer Information Series—Practical information, based on NBS research and experience, covering areas of interest

to the consumer. Easily understandable language and

illustrations provide useful background knowledge for shopping in today's technological marketplace.

Order above NBS publications from: Superintendent of Documents, Government Printing Office, Washington, D.C.

20402. Order following NBS publications—NBSIR's and FIPS from

the National Technical Information Services, Springfield, Va. 22161.

Federal Information Processing Standards Publications (FIPS PUB)—Publications in this series collectively constitute the Federal Information Processing Standards Register.

Register serves as the official source of information in the Federal Government regarding standards issued by NBS

pursuant to the Federal Property and Administrative Services Act of 1949 as amended, Public Law 89-306 (79 Stat. 1127), and as implemented by Executive Order 11717

(38 FR 12315, dated May 11, 1973) and Part 6 of Title 15 CFR (Code of Federal Regulations).

NBS Interagency Reports (NBSIR)—A special series of

interim or final reports on work performed by NBS for outside sponsors (both government and non-government).

In general, initial distribution is handled by the sponsor;

public distribution is by the National Technical Information

Services (Springfield, Va. 22161) in paper copy or microfiche form.

BIBLIOGRAPHIC SUBSCRIPTION SERVICES

The following current-awareness and literature-survey bibli- ographies are issued periodically by the Bureau: Cryogenic Data Center Current Awareness Service. A litera- ture survey issued biweekly. Annual subscription: Domestic, $25.00; Foreign, $30.00.

Liquified Natural Gas. A literature survey issued quarterly.

Annual subscription: $20.00.

Superconducting Devices and Materials. A literature survey

issued quarterly. Annual subscription: $30.00. Send subscription orders and remittances for the preceding bibliographic

services to National Bureau of Standards, Cryogenic Data

Center (275.02) Boulder, Colorado 80302.
U.S. DEPARTMENT OF COMMERCE

National Bureau of Standards

Washington. D C. 20234

OFFICIAL BUSINESS

Penalty for Private Use, $300

POSTAGE AND FEES PAID

U.S. DEPARTMENT OF COMMERCE COM-215

SPECIAL FOURTH-CLASS RATE BOOK