DRAFT UGANDA STANDARD  
  DUS 175 
Second  Edition  
2018 9 
 
 
 Reference number  
DUS 175: 2019 
© UNBS 2019  
  
 Sesame Oil — Specification  
 DUS 175: 2019 
ii © UNBS 2019 – All rights reserved  
 Compliance with this standard does not, of itself confer immunity from legal obligations  
A Uganda Standard does not purport to include all necessary provisions of a contract. Users are 
responsible for its correct application  
© UNBS 2018   
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilised in any 
form or by any means, electronic or mechanical, including photocopying and microfilm, without prior written 
permission from UNBS.  
Requests for permission to reproduce this document should be addressed to  
The Executive Director  
Uganda National Bureau of Standards  
P.O. Box 6329  
Kampala  
Uganda  
Tel: +256 41 4 333 2 50/1/2/3  
Fax: +256 41 4 286 123  
E-mail: info@unbs.go.ug  
Web: www.unbs.go.ug  DUS 175:2019 
© UNBS 2019 – All rights reserved  iii 
 Contents  Page 
Foreword  ................................ ................................ ................................ ................................ ............................  iv 
1 Scope  ................................ ................................ ................................ ................................ ......................  1 
2 Normative references  ................................ ................................ ................................ ............................  1 
3 Terms and definitions  ................................ ................................ ................................ ...........................  2 
4 Compositional and Qua lity Requirements  ................................ ................................ ..........................  2 
4.1Quality Requirements  ................................ ................................ ................................ ................................ ... 2 
4.2 Chemical and Physical characteristics  ................................ ................................ ...............................  2 
4.3 Fortification  ................................ ................................ ................................ ................................ ............  3 
4.4 Food additives  ................................ ................................ ................................ ................................ ....... 3 
4.5 Hygiene  ................................ ................................ ................................ .......Error! Bookmark not defined.  
4.6 Contaminants  ................................ ................................ ................................ ................................ .........  3 
4.7 Pesticide residues  ................................ ................................ ..................... Error! Bookma rk not defined.  
5 Packaging  ................................ ................................ ................................ ................................ ...............  3 
6 Labelling  ................................ ................................ ................................ .....Error! Bookmark not defined.  
7 Sampling  ................................ ................................ ................................ ................................ ................  4 
Annex  A (normative)  GLC Fatty acid composition  ................................ ............ Error! Bookmark not defined.  
A.1 General  ................................ ................................ ................................ .......Error! Bookmark not defined.  
When required the fatty acid profile should be determined by Gas Liquid chromatography. 
Ranges of fatty acids are given in table A.1 for information  ................ Error! Bookmark not defined.  
Table A 1: GLC Fatty acid composition  ................................ ............................... Error! Bookmark not defined.  
Bibliography  ................................ ................................ ................................ ................................ ........................  5 
 DUS 175: 2019 
iv © UNBS 2019 – All rights reserved  
 Foreword  
Uganda National Bureau of Standard s (UNBS) is a parastatal under the Ministry of Trade , Industry and 
Cooperatives established under Cap 327 , of the Laws of Uganda , as amended .  UNBS is mandated to co -
ordinate the elaboration of standards and is  
(a) a member of International Organisation for S tandardisation (ISO) and  
(b) a contact point for the WHO/FAO Codex Alimentarius Commission on Food Standards, and  
(c) the National Enquiry Point on TBT  Agreement  of the World Trade Organisation (WTO).  
The work of preparing Uganda Standards is carried out through  Technical Committees. A Technical 
Committee is established to deliberate on standards in a given field or area and consists of key stakeholders 
including government, academia, consumer groups, private sector and other interested parties.  
Draft Uganda Sta ndards adopted by the Technical Committee are widely circulated to stakeholders and the 
general public for comments. The committee reviews the comments before recommending the draft standards 
for approval and declaration as Uganda Standards by the National  Standards Council.  
The committee responsible for this document is Technical Committee UNBS /TC 2, Food and agriculture , 
Subcommittee SC 2, Edible oil seeds, fats and oils . 
This second  edition cancels and replaces the first edition ( US 175:2009), which has been tec hnically r evised.  
 DRAFT UGANDA STANDARD  DUS 175: 2019 
 
© UNBS 2019 – All rights reserved  1 
 Sesame Oil  — Specification  
1 Scope   
This Draft Uganda Standard specifies the requirements, test methods and sampling for sesame oil suitable for 
human consumption   derived from Sesame seeds  (Sesamum indicum  L.).. 
2 Normative re ferences  
The following referenced documents referred to in the text in such a way that some or all of their content 
constitutes requirements of this document. For dated references, only the edition cited applies. For undated 
references, the latest e dition of the referenced document (including any amendments) applies.  
US 1673, Sesame  grain specification  
US EAS 38 , Labelling of pre -packaged foods  — Specification  
US EAS 39 , Code of practice for hygiene for food and drink industries  
US ISO 660, Animal and veget able fats and oils  Determination of acid value and acidity  
US ISO 662, Animal and vegetable fats and oils  Determination of moisture and volatile matter  content  
US ISO 663, Animal and vegetable fats and oils  Determination of insoluble impurities  conte nt 
US ISO 3596, Animal and vegetable fats and oils  Determination of unsaponifiable matter  — Method using 
diethyl ether  
US ISO 3657, Animal and vegetable fats and oils  Determination of saponification value  
US ISO 3960, Animal and vegetable fats and oils  Determination of peroxide value  — Iodometric (visual) 
endpoint determination  
US ISO 3961, Animal and vegetable fats and oils  Determination of iodine value  
US ISO 5508: Animal and vegetable fats and oils — Analysis by gas chromatography of methyl esters  of fatty 
acids  
US ISO 5555, Animal and vegetable fats and oils  Sampling  
US ISO 6320, Animal and vegetable fats and oils  Determination of refractive index  
US ISO 6321,  Animal and vegetable fats and oils — Determination of melting point in open capillar y tubes 
(Slip point)  
US ISO 8294, Animal and vegetable fats and oils  Determination of copper, iron and nickel  contents — 
Graphite furnace atomic absorption method   
2 © UNBS 2019 – All rights reserved  
 US ISO 12193, Animal and vegetable fats and oils  Determination of lead  by direct  graphite  furnace atomic 
absorption spectroscopy  
US ISO 15305, Animal and vegetable fats and oils  Determination of Lovibond colour  
IUPAC 2.101, Determination of Relative Density  
3 Terms and definitions  
For the purposes of this document, the following terms and de finitions apply.   
3.1 
Virgin vegetable oils,  
are edible vegetable fats and oils obtained, without altering the nature of the oil, by mechanical procedures, 
e.g. expelling or pressing, and the application of heat only. They may be purified by washing with water, 
settling, filtering and centrifuging only . 
3.2 
Non –Virgin (refined) vegetable oils,  
oils of plant origin obtained by mechanical procedures and/or solvent extraction and subjected to refining 
processes to adopt it specially for use in food products . 
4 Requirements  
4.1 General  requirements  
Sesame oil shall   
a) be of colour characteristic of the designated product;  
b) be free from adulterants, sediments, suspended or foreign matter, separated water and added 
colouring or  flavouring substances;  
c) be free from foreign or rancid odour and taste.  
4.2 Specific requir ements  
Sesame oil shall have the physical and chemical characteristics shown in Table1.  
Table 1 —Specific requirements for Sesame Oil  
S/N Characteristic  Requirement  
 Test Method  
i Relati ve Density ( 20oC/ water at 
20oC )  0.915 – 0.923  IUPAC 2.101  
ii Refractive Index (n D 40  1.456 – 1.469  US ISO 6320  
iii Saponification Value (mg KOH/g 
oil) 187 – 195 US ISO 3657  
iv Iodine Value (Wij’s)  104 – 120 US ISO 3961 1 
v Colour, units in a 25.4 mm  
Lovibond cell, max  Not specific  US ISO 15305  
vi Unsaponifiable Matter, g/kg, max.  20 US ISO 3596  
viii Acid Value, mg KOH/g, max.  Non Virgin 0.6  US ISO 5508  
ix Peroxide Value, meq. Peroxide 
oxygen/kg, max.  0.2 US ISO 3960  
 Volatiles  and Moisture  Virgin 0.4  US ISO 662  DUS 175: 2019 
© UNBS 2019 – All righ ts reserved  3 
 Non Virgin 0.1  
v Copper, mg/kg  Virgin 5  
Non Virgin 1.5  US ISO 8294  
iv Iron, mg/kg  0.915 – 0.923  
4.3 Fortification  
Sesame oil shall contain Vitamin A and its esters, Vitamin D, Vitamin E and its esters, and other vitamins in 
accordance with US EAS 769 . 
5 Food additives  
Only the food additives permitted in US 45 may be used . 
6 Contaminants  
6.1 Pesticide residues  
Sesame oil shall comply with those maximum pesticide residue limits established by the Codex Alimentarius 
Commission for this c ommodity. . 
6.2 Heavy metals  
Sesame oil shall comply with those maximum heavy metal limits established by CODEX Alimentarius 
commission for similar commodities  
Table 2 — Limits for Contaminants in Edible Sesame oil  
S/N Contaminants  Maximum 
Level  Test Meth od 
i Lead, mg/kg  0.1 US ISO 12193  
ii Arsenic, mg/kg  0.1 US ISO 2590  
6.3 Aflatoxin  
When determined in accordance wi th the method pr escribed in US ISO 16050 , the maximum aflatoxin  content 
in sesame oil shall not exceed 5mg/kg  for total aflatoxins . 
7 Hygie ne  
Sesame oil shall be produced, processed, handled and stored in accordance with US EAS 39.  
8 Weights and measures  
Sesame oil shall be packaged in accordance with the Weights and measures regulations of the destination 
country.  
9 Packaging  
Sesame oil shall be packaged in food grade containers which will safeguard the hygienic, nutritional, and 
organoleptic qualities of the product.   
4 © UNBS 2019 – All rights reserved  
 10 Labelling  
In addition to the requirements in US EAS 38, each package shall be legibly and indelibly labelled with the 
following:  
a) name of the product shall be “sesame oil ”;  
b) brand name/trade name ; 
c) name and physical address of the manufacturer ; 
d) lot identification ;  
e) batch/code number ; 
f) net weight in metric units ; 
g) list of any additives used;  
h) date of manufacture;  
i) country of ori gin; 
j) storage conditions;  and 
k) expiry dat e/best before date.  
11 Sampling   
Sampling of  sesame shall be done in accordance with and prepared in accordance to US ISO 661  DUS 175: 2019 
© UNBS 2019 – All righ ts reserved  5 
 Bibliography  
[1] CODEX STAN. 26, 1981 (Rev 1 1989), Codex standard for edible Sesame oil  
[2] US 175:2008, Sesame oil specification  
 DUS 175: 2019 
© UNBS 2019 – All rights reserved  7 
 Certification marking  
Products that conform to Uganda standards may be marked with Uganda National Bureau of Standards 
(UNBS) Certification Mark shown in the figure below.  
The use of the UNBS Certification Mark i s governed by the Standards Act, and the Regulations made 
thereunder. This mark can be used only by those licensed under the certification mark scheme operated by 
the Uganda National Bureau of Standards and in conjunction with the relevant Uganda Standard.  The 
presence of this mark on a product or in relation to a product is an assurance that the goods comply with the 
requirements of that standard under a system of supervision, control and testing in accordance with the 
certification mark scheme of the Ugan da National Bureau of Standards. UNBS marked products are 
continually checked by UNBS for conformity to that standard.  
Further particulars of the terms and conditions of licensing may be obtained from the Director, Uganda 
National Bureau of Standards.  
 
 DUS 175: 2018    
 
ICS 67.200.10  
Price based on nn pages  
© UNBS 2019 – All rights reserved