AS/NZS 1301.421S:1998

1 - AS/NZS 1301.421s:1998 METHODS OF TEST FOR PULP AND PAPER - DETERMINATION OF THE pH VALUE OF AQUEOUS EXTRACTS OF PAPER, BOARD AND
4 - Contents
5 - Foreword
6 - Introduction
7 - 1 Scope
7 - 2 Normative references
7 - 3 Principle
7 - 4 Apparatus
7 - 4.1 Glassware of chemically resistant glass
7 - 4.2 pH meter
7 - 5 Reagents
7 - 5.1 Distilled or deionized water
7 - 5.2 pH standards
7 - pH 4.00 at 20 degrees C
8 - pH 6.87 at 20 degrees C
8 - pH 9.23 at 20 degrees C
8 - 6 Preparation of sample
8 - 7 Procedure
9 - 8 Expression of results
9 - 9 Report
10 - Annex A
10 - Bibliography

This standard sets a method to determine the pH of an aqueous extract of paper, board orpulp, which is obtained by using a cold extraction method.

This standard sets a method to determine the pH of an aqueous extract of paper, board or pulp, which is obtained by using a cold extraction method.

First published in Australia as AS P1.P421m-1964.
Revised and redesignated AS 1301.P421-1973.
Revised and redesignated AS 1301.421s-1991.
First published in New Zealand as NZS P1.P421ts:1957.
Revised and redesignated NZS P421m:1959.
Second edition 1964.
Revised and redesignated NZS/AS 1301.P421m:1973.
Revised and redesignated NZS/AS 1301.421s:1991.
Jointly revised and designated AS/NZS 1301.421s:1998.