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Norm

ISO 6588-2:2021

Ausgabedatum: 2021 11 23

Paper, board and pulps — Determination of pH of aqueous extracts — Part 2: Hot extraction

This document specifies a method for the determination of the pH-value defined by the electrolytes extractable by hot water from a sample of paper, board or pulp. This do...
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Herausgeber:
International Organization for Standardization
Format:
Digital | 7 Seiten
Sprache:
Englisch

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

This document is applicable to all kinds 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 can sometimes be different (e.g. fully bleached pulp) from the pH-value measured under mill process conditions in which various types of process waters, such as chemically treated river water containing electrolytes, are used. In such cases, ISO 29681 can 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 gives more realistic results related to mill conditions than those obtained with this document. For cellulosic papers used for electrical purposes, the method used can be that given in IEC 60554-2[5].

ISO 6588-2:2021
2021 11 23
Paper, board and pulps — Determination of pH of aqueous extracts — Part 2: Hot extraction
Norm
ISO 6588-2:2020
2020 03 04
Paper, board and pulps — Determination of pH of aqueous extracts — Part 2: Hot extraction
Norm
ISO 6588-2:2012
2012 10 29
Paper, board and pulps — Determination of pH of aqueous extracts — Part 2: Hot extraction
Norm
ISO 6588-2:2005
2005 06 02
Paper, board and pulps — Determination of pH of aqueous extracts — Part 2: Hot extraction
Norm
ISO 6588:1981
1981 04 01
Paper, board and pulps — Determination of pH of aqueous extracts
Norm
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