Electrode for Automatic Titrator

Titration & Electrodes
Electrodes are necessary for automatic potentiometric titrator.
The variety of electrodes and its combination with reagents
enables various titrations.

・Indicator electrodeThe reading potential of glass electrode or metal electrodes change with a constant relation to aconcentration of solution when measuring pH or redox potential of the solution.

・Reference electrodeA reference electrode is a standard electrode to measure the electromotive force of an indicator
electrode which has the ability to maintain a constant electric potential irrespective of pH ofsolution or concentration of oxidizing agent and reducing agent.

・Combination electrode
Reference and indicator electrodes are combined into a single cylinder. The combination electrode isused for cases where the diameter of the vessel is small like a test tube or Erlenmeyer flask, or whenthe electrodes don’t fit within the electrode holder at the measurement of different titrations.

2Usage and Combination of Electrodes
Titration

Analytes

UsageGeneral use
General use
Movable sleeve type

Acids・Bases
For test tube
(HCl, H2SO4, HNO3,(≧φ18, ≦180mm in height)
Neutralization
NaOH etc.)
Cable length 1.0 m
For test tube or closed cellIndicator
electrode

Referenceelectrode

Glass electrode

Reference electrodeGE-101B

RE-201Z

Glass-Reference combination electrodeGR-501BZ
Glass-Reference combination electrodeGR-511BZ
Glass-Reference combination electrodeGR-521BZ
Glass-Reference combination electrodeGR-522BZ(≧φ18, ≦105 mm in height)

For Erlenmeyer flask
w/ Temperature compensationelectrode
General use

Redox

Metal ions(Cu , Fe3+ etc.),
I2, H2O22+General use
For test tube or closed cell

Glass-Reference combination electrodeGR-525BZ
Glass-Reference Thermistor electrodeGRT-603BZ
Platinum electrode

Reference electrodePT-301

RE-201Z

Platinum-Reference combination electrode

PR-701BZ
Platinum-Reference combination electrodePR-731BZ(≧φ18, ≦105 mm in height)

For Erlenmeyer flask

General use
General use
Precipitation

Halogen ions(Cl-, I-, Br-),
SH-, S2-

For non-aqueous solvent
General use
Double junction typeCombination with glass electrodeenables neutralization titration.

Platinum-Reference combination electrodePR-733BZ
Silver electrodeAG-311Silver referenceelectrodeMS-231Z

Silver electrodeAG-311Sliver referenceelectrode

RE-241Z

Silver electrodeAG-312

Sliver referenceelectrodeMS-231Z

Silver-Reference combination electrode

AGR-801Z
Silver-Reference combination electrode

AGR-811Z―

Lead ion

For lead-ion measurement

Lead ion-selectiveelectrode―

Copper ion

For copper-ion measurement

Copper ion-selective
Reference electrodeelectrode―

Chloride ion

For chloride-ion measurement―

Surfactant

For surfactant measurement

PBi-081CUi-081
Chloride ion-selectiveelectrodeCLi-081

Reference electrodeRE-201Z

RE-201Z

Sliver referenceelectrodeMS-231Z

Surfactant electrode Reference electrodeSU-091

RE-201Z3Electrodes for Neutralization Titration

GE-101B

TE-403
RE-201Z

GRT-603BZ

Glass electrode

4Referenceelectrode

Thermistor
electrode

Glass-Reference
Thermistor electrodeModel

GE-101B

RE-201Z

TE-403

GRT-603BZ

Part No.

D252350-1

D230732-A

D252415-A

D254708-A

Temp.
range

-5～80℃-5～100℃-5～80℃-5～100℃

Innersolution-4M KCl-4M KCl

Note

General use

General use

Temperaturecompensation for pH

w/ Temperaturecompensation electrodeElectrodes for Neutralization Titration

GR-501BZ

GR-511BZ

GR-521BZ

Glass-Reference combination electrode
Model

GR-501BZ

GR-511BZ

GR-521BZPart No.

D254700-A

D254704-A

D254701-B

Temp.
range

-5～80℃-5～80℃-5～80℃

Inner
solution

4M KCl4M KCl4M KClNote

General use

Movable sleevetype

For test tube (≧φ18,
Cable length:1.0m≦180mm in height)

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Electrodes for Neutralization Titration
Glass-Reference
combination electrodeGR-522BZ

Model

GR-522BZPart No.

D254702-A

Temp.
range

-5～80℃

Inner
solution

4M KClNote

For test tube or closed cell(≧φ18, ≦105 mm in height)

Glass-Reference
combination electrodeGR-525BZ

6ModelGR-525BZPart No.

D254703-A

Temp.
range

-5～100℃

Innersolution

4M KClNote

For Erlenmeyer flask

Electrodes for Redox Titration

RE-201Z

PT-301

PR-701BZ
PR-731BZ

PR-733BZ

Platinum electrode

Referenceelectrode

Platinum-Reference combination electrodeModel

PT-301

RE-201Z

PR-701BZ

PR-731BZ

PR-733BZ

Part No.

D231244-A

D230732-A

D254705-A

D254706-A

D254707-C

Temp.
range

-5～100℃-5～100℃-5～100℃-5～100℃-5～100℃

Inner
solution-4M KCl

4M KCl4M KCl4M KClNote

General use

General use

General use

For test tube
or closed cell(≧φ18, ≦105mm in height)

For Erlenmeyer
flask

7

Electrodes for Precipitation Titration

AG-311/AG-311A

AG-312

MS-231Z

RE-241Z

Silver indicator electrode

Silver reference electrodeModel

AG-311

AG-311A

AG-312

MS-231Z*

RE-241ZPart No.

E231245-A

D251215-A

D231259-A

D230733-A

D230129-A

Temp.
range

-5～100℃-5～100℃-5～80℃-5～60℃-5～60℃

Innersolution---0.35 mol/L
K2SO4Outer cylinder: Saturated KNO3
Inner cylinder: 4M KCl containing
AgClNoteGeneraluse

Silver chloridecoated AG-311

For nonaqueoussolvent

General use

Double junction type＊”Mercurous sulfate” is used as the inner electrode.

8Electrodes for Precipitation Titration
Silver-Reference combination electrode

AGR-801Z

ModelAGR-801Z*

AGR-811Z/AGR-811AZ

Part No.

D230736-A

D230090-A/D230139-A

Temp.
range

-5～60℃-5～60℃

Innersolution

0.35 mol/L
K2SO4Outer cylinder:
Saturated KNO3
Inner cylinder:
4M KCl containing AgClNote

General use

Double junction type
/Silver chloride-coated
AGR-811＊”Mercurous sulfate” is used as the inner electrode.

AGR-811Z/AGR-811AZ＊Remark for electrode using mercury
・ When disposing, please properly dispose complying with the law and regulations.
・ Please inform industrial waste disposal contractors that mercury is contained in the electrode.

9Other Electrodes

PBi-081CUi-081CLi-081SU-091

Lead ionselective
electrode

Copper ionselective
electrode

Chloride ionselective
electrode

Surfactant
electrodeModel

PBi-081CUi-081CLi-081SU-091

Part No.

D236000-1

D236005-1

D236010-1

D236100-1

Temp.
range

0～50℃

0～50℃

0～50℃

5～40℃

Innersolution----Use with referenceelectrode RE-201Z.

Use with referenceelectrode RE-201Z.

Use with Sliverreference electrodeMS-231Z

Use with referenceelectrode RE-201Z.

Note

Inner solution for electrodes
Please refer to the recipe attached to each electrode for the preparation of inner solution.
*Inner solution for perchloric acid titration
In the case of perchloric acid titration, when 4 M potassium chloride inner solution is used,
the potential change (differential value) at the end point shows a tendency to get small because
water is mixed in the acetic acid solution.
The exchange of the inner solution to the saturated perchloric acid- acetic acid solution which contains
no water is recommended.

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MEMO

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※The listed items are dedicated products for HIRANUMA Titrators.
※Appearance and specifications are subject to change for the improvement of products without notice.
CAUTION: For correct operation, follow the instruction manual when using the items.

Sales

Manufacturer

HIRANUMA Co., Ltd.
www.hitachi-hightech.com/global/hhs/
Head Office
Toranomon Hills Business Tower,
1-17-1 Toranomon, Minato-ku, Tokyo 105-6409, Japan

BJ-0203A

www.hiranuma.com/english/index.html
Head Office1739 Motoyoshida, Mito, Ibaraki, 310-0836, Japan

HSS-E036

2023.03