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ISO 29681:2009

Paper, board and pulps — Determination of pH of salted water extracts

Dec 8, 2009

General information

90.93     Dec 5, 2025

ISO

ISO/TC 6

International Standard

85.040  

English   French  

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Scope

ISO 29681:2009 specifies a method for the determination of the pH of an aqueous extract of paper, board and pulps, in which the soaking and the measuring are performed in salted water (0,1 M KCl solution).
ISO 29681:2009 is applicable to all kinds of paper, board and pulps, but is specifically applicable to bleached pulps from virgin fibres and to pulp samples having a low ionic strength for which the pH-value using this International Standard will give more realistic results related to mill conditions than those obtained with ISO 6588-1 or ISO 6588-2.

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PUBLISHED
ISO 29681:2009
90.93 Standard confirmed
Dec 5, 2025