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AS/NZS 1301.422:2020

Current
Current

The latest, up-to-date edition.

Method of test for pulp and paper Paper, board and pulps - Determination of pH of aqueous extracts - Hot extraction
Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Language(s)

English

Published date

10-07-2020

Preview

This document adopts ISO 6588-2:2020, which 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 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 will sometimes be different (e.g. 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 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 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 can be that given in IEC 60554-2[4].

Committee
PK-019
DocumentType
Standard
ISBN
978 1 76072 926 4
Pages
7
PublisherName
Standards Australia
Status
Current
Supersedes

Standards Relationship
ISO 6588-2:2020 Identical

Originated in Australia as AS 1301.P1.P422m—1964.
Originated in New Zealand as NZS P1.422ts:1957.
Jointly revised and redesignated as
AS/NZS 1301.422s:1998.
Second edition AS/NZS 1301.422s:2007.
Jointly revised and redesignated AS/NZS 1301.422:2020. Originated in Australia as AS 1301.P1.P422m-1964. Originated in New Zealand as NZS P1.422ts:1957. Jointly revised and redesignated as AS/NZS 1301.422s:1998. Second edition AS/NZS 1301.422s:2007. Jointly revised and redesignated AS/NZS 1301.422:2020.

ISO 29681:2009 Paper, board and pulps Determination of pH of salted water extracts
ISO 3696:1987 Water for analytical laboratory use — Specification and test methods
IEC 60554-2:2001 Cellulosic papers for electrical purposes - Part 2: Methods of test
ISO 186:2002 Paper and board — Sampling to determine average quality
ISO/TR 24498:2019 Paper, board and pulps Estimation of uncertainty for test methods by interlaboratory comparisons
ISO 7213:1981 Pulps Sampling for testing
ISO 6588-1:2020 Paper, board and pulps Determination of pH of aqueous extracts Part 1: Cold extraction

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