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Product Product ISO 6588-1:2020
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Description Description

This document specifies a method for the determination of the pH-value defined by the electrolytes extractable by cold water from a sample of paper, board or pulp.

This document is applicable to all types of paper, board and pulp.

As the quantity of extractable ionic material approaches zero, as in the case of highly purified pulps, the precision of the method becomes poor because of the difficulties encountered in making pH measurements on water containing little electrolytic material.

Since the extraction in this document is performed with distilled or deionised water, the pH-value measured will sometimes be different (e.g. for fully bleached pulp) from the pH-value measured under mill process conditions in which various types of process waters, e.g. chemically treated river water containing electrolytes, are used. In such cases, ISO 29681 should be used instead, as it is specifically applicable to bleached pulps from virgin fibres and to pulp samples having a low ionic strength for which the pH value will give more realistic results related to mill conditions than those obtained with this document.

For cellulosic papers used for electrical purposes, the method used should be that given in IEC 60554‑2[4].

Standard Number Standard Number ISO 6588-1:2020
Title Title ISO 6588-1:2020 Paper, board and pulps — Determination of pH of aqueous extracts — Part 1: Cold extraction
Status Status Published
Publication Date Publication Date 24 Feb 2020
Cross References Cross References
Descriptors Descriptors
ICS ICS 85.040
Committee Committee ISO/TC 6 Paper, board and pulps
Publisher Publisher PECB Store
Format Format PDF
Delivery Delivery NO
Pages Pages 7
File Size File Size KB