Paper, board and pulps — Determination of water-soluble chlorides

ISO 9197:2016 specifies a method for the determination of water-soluble chlorides in all types of paper, board and pulp. The lower limit of the determination is 20 mg of chloride ion per kilogram of dry sample.

Papier, carton et pâtes — Détermination des chlorures solubles dans l'eau

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Published
Publication Date
16-Aug-2016
Current Stage
Ref Project

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INTERNATIONAL ISO
STANDARD 9197
Third edition
2016-08-15
Paper, board and pulps —
Determination of water-soluble
chlorides
Papier, carton et pâtes — Détermination des chlorures solubles
dans l’eau
Reference number
ISO 9197:2016(E)
ISO 2016
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ISO 9197:2016(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

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ii © ISO 2016 – All rights reserved
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ISO 9197:2016(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

5 Reagents ........................................................................................................................................................................................................................ 1

6 Apparatus ..................................................................................................................................................................................................................... 2

7 Sampling and preparation of sample .............................................................................................................................................. 2

8 Procedure..................................................................................................................................................................................................................... 2

9 Expression of results ........................................................................................................................................................................................ 3

10 Test report ................................................................................................................................................................................................................... 3

Annex A (informative) Precision ............................................................................................................................................................................... 5

Annex B (informative) Laboratory manuals ................................................................................................................................................. 6

Bibliography ................................................................................................................................................................................................................................ 7

© ISO 2016 – All rights reserved iii
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ISO 9197:2016(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO 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, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO’s adherence to the WTO principles in the Technical

Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 6, Paper, board and pulps.

This third edition cancels and replaces the second edition (ISO 9197:2006), of which it constitutes a

minor revision. The changes compared to the previous edition are as follows:
— the text in 5.4 on the preparation of nitric acid has been corrected;
— the precision statement has been moved to Annex A.
iv © ISO 2016 – All rights reserved
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INTERNATIONAL STANDARD ISO 9197:2016(E)
Paper, board and pulps — Determination of water-soluble
chlorides
1 Scope

This International Standard specifies a method for the determination of water-soluble chlorides in

all types of paper, board and pulp. The lower limit of the determination is 20 mg of chloride ion per

kilogram of dry sample.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

ISO 186, Paper and board — Sampling to determine average quality

ISO 287, Paper and board — Determination of moisture content of a lot — Oven-drying method

ISO 638, Paper, board and pulps — Determination of dry matter content — Oven-drying method

ISO 7213, Pulps — Sampling for testing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
water soluble chlorides

amount of chloride ion that is extracted with cold water and determined under the conditions specified

4 Principle

Pieces of the sample under test are extracted with water at room temperature in a disintegrator. The

resulting suspension is filtered and an aliquot is used for determination of the chloride ion content by

ion chromatography.
5 Reagents

During the analysis, use only reagents of recognized analytical quality and only water as specified in 5.1.

5.1 Distilled or demineralized water, conductivity less than 0,2 mS/m.

5.2 Chloride stock solution, c(Cl) = 1 000 mg/l. Dry a portion of potassium chloride, (KCI), at 140 °C.

Transfer 210,2 mg thereof to a 100 ml volumetric flask, dissolve the KCI and dilute to the mark with

water (5.1). Commercially available standard solutions may be used.

5.3 Chloride matching solution. Dilute the chloride stock solution (5.2) to a mass fraction of

chloride ion of, for example, c(Cl) = 10 mg/l. Do not use chloride matching solutions that are more than

one week old.
© ISO 2016 – All rights reserved 1
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ISO 9197:2016(E)

5.4 Nitric acid, c(HNO ) = 1,3 mol/l. Add with caution 82 ml of concentrated nitric acid,

c(HNO ) = 15,8 mol/l (about 70 % HNO ), to 500 ml of water (5.1) and dilute to 1 l.

3 3
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