AS/NZS 1301.422:2020
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
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English
07-10-2020
Important note : All end users must be registered with an Account prior to user licenses being assigned.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.
| Committee |
PK-019
|
| DocumentType |
Standard
|
| ISBN |
978 1 76072 926 4
|
| Pages |
7
|
| PublisherName |
Standards Australia
|
| Status |
Current
|
| Supersedes |
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].
| 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.
| 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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