ISO 3961:1989

Animal and vegetable fats and oils — Determination of iodine value

Corps gras d'origines animale et végétale — Détermination de l'indice d'iode

General Information

• Status: Withdrawn
• Publication Date: 23-Aug-1989
• Withdrawal Date: 23-Aug-1989
• ICS: 67.200.10 - Animal and vegetable fats and oils
• Technical Committee: ISO/TC 34/SC 11 - Animal and vegetable fats and oils
• Drafting Committee: ISO/TC 34/SC 11 - Animal and vegetable fats and oils
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 06-Jun-1996

Relations

• Revised: ISO 3961:1996 - Animal and vegetable fats and oils — Determination of iodine value
• Effective Date: 15-Apr-2008
• Revises: ISO 3961:1979 - Animal and vegetable oils and fats — Determination of iodine value
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTER NATIONAL
IS0
STANDARD
3961
Second edition
1989-09-01
Animal and vegetable fats and oils -
Determination of iodine value
Corps gras d'origines animale et végétale - Détermination de I'indice d'iode
Reference number
IS0 3961 : 1989 (E)

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IS0 3961 : 1989 (E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards bodies (IS0 member bodies). The work of preparing International
Standards is normally carried out through IS0 technical committees. Each member
body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the work. IS0
collaborates closely with the International Electrotechnical Commission (IEC) on all
matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council. They are approved in accordance with IS0 procedures requiring at
least 75 % approval by the member bodies voting.
International Standard IS0 3961 was prepared by Technical Committee ISO/TC 34,
Agricultural food products.
This second edition cancels and replaces the first edition (IS0 3961 : 19791, of which it
constitutes a technical revision.
O IS0 1989
All rights reserved. No part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying and microfilm, without permission in
writing from the publisher.
International Organization for Standardization
Case postale 56 0 CH-121 1 Genève 20 0 Switzerland
Printed in Switzerland

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IS0 3961 : 1989 (E)
INTERNATIONAL STANDARD
Animal and vegetable fats and oils - Determination of
iodine value
1 Scope 5 Reagents
This International Standard specifies a method for the determi- All reagents shall be of recognized analytical grade.
0
nation of the iodine value of animal and vegetable fats and oils.
Water, complying with the requirements of IS0 3696,
5.1
grade 3.
2 Normative references
Potassium iodide, 100 g/l solution, not containing free
5.2
The following standards contain provisions which, through
iodine or iodate.
reference in this text, constitute provisions of this International
Standard. At the time of publication, the editions indicated
were valid. All standards are subject to revision, and parties to
5.3 Starch, solution.
agreements based on this International Standard are encouraged
to investigate the possibility of applying the most recent
Mix 5 g of soluble starch in 30 ml of water, add this mixture to
editions of the standards listed below. Members of IEC and IS0
1 O00 ml of boiling water, boil for 3 min and allow to cool.
maintain registers of currently valid International Standards.
5.4 Sodium thiosulfate, standard volumetric solution
IS0 661 : 1989, Animal and vegetable fats and oils - Prep-
c(Na2S203.5H20) = 0,l mol/l, standardized not more than
aration of test sample.
7 days before use.
IS0 3696 : 1987, Water for analytical laboratory use -
Specification and test methods. 5.5 Solvent, carbon tetrachloride.
IS0 5555 : 1983, Animal and vegetable fats and oils - WARNING - Carbon tetrachloride is toxic. A less harm-
Sampling. ful solvent is being sought.
Wijs reagent, containing iodine monochloride in acetic
5.6
3 Definition
acid. Commercially available Wijs reagent shall be used.
For the purposes of this International Standard, the following
definition applies.
6 Apparatus
iodine value : The mass of iodine absorbed by the sample
Usual laboratory apparatus and, in particular, the following.
under the operating conditions specified in this International
Standard.
Glass weighing scoops, suitable for the test portion
6.1
The iod
...