SIST ISO 6587:2023

SLOVENSKI STANDARD
01-julij-2023
Papir, karton, lepenka in vlaknine - Določanje prevodnosti vodnih ekstraktov
Paper, board and pulps — Determination of conductivity of aqueous extracts
Papier, carton et pâtes — Détermination de la conductivité des extraits aqueux
Ta slovenski standard je istoveten z: ISO 6587:2021
ICS:
85.040 Vlaknine Pulps
85.060 Papir, karton in lepenka Paper and board
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 6587
Third edition
2021-11
Paper, board and pulps —
Determination of conductivity of
aqueous extracts
Papier, carton et pâtes — Détermination de la conductivité des
extraits aqueux
Reference number
© ISO 2021
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
5.1 Distilled or deionized water . 2
5.2 Potassium chloride, standard solutions . 2
5.2.1 0,01 mol/l solution . 2
5.2.2 0,001 mol/l solution . 2
6 Apparatus . 2
7 Sampling and sample preparation . 3
7.1 Sampling . 3
7.2 Sample preparation . 3
7.3 Determination of dry matter content . . 3
8 Procedure .3
8.1 Determination of cell constant . 3
8.2 Preparation of the aqueous extract . 4
8.2.1 Weighing of sample . 4
8.2.2 Hot extraction method . 4
8.2.3 Cold extraction method . 4
8.3 Determination of conductivity . 4
8.4 Blank test . 4
9 Calculation and expression of results . 4
9.1 If the meter gives conductance . 4
9.2 If the meter gives resistance . 5
9.3 Expression of results . . 5
10 Test report . 5
Bibliography . 6
iii
Foreword
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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
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
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This document was prepared by Technical Committee ISO/TC 6, Paper, board and pulps.
This third edition cancels and replaces the second edition (ISO 6587:1992), which has been technically
revised.
The main changes are as follows:
— editorial updates;
— requirement added to 7.1;
— bibliography update.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
Conductivity measurement provides an indication of the level of residual ionic impurities in pulp. It can
thus be used, for example, to assess the effectiveness of washing in the pulp and paper manufacturing
process.
v
INTERNATIONAL STANDARD ISO 6587:2021(E)
Paper, board and pulps — Determina
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