ISO 9197:2016

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)

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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
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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
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electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
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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.
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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.
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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,
3
c(HNO ) = 15,8 mol/l (about 70 % HNO ), to 500 ml of water (5.1) and dilute to 1 l.
3 3
...