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AS/NZS 1301.421:2020
$87.70
Method of test for pulp and paper, Method 421: Paper, board and pulps — Determination of pH of aqueous extracts — Cold extraction
This document adopts ISO 6588-1:2020, which 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.
Table of contents
Header
About this publication
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
5.1
5.2
5.3
6 Apparatus and equipment
6.1
6.2
7 Sampling and preparation of sample
7.1 Sampling
7.2 Preparation of sample
8 Procedure
8.1 Weighing
8.2 Extraction
8.3 Determination of pH
9 Calculation
10 Test report
Annex A
A.1 Buffer solution pH 4,0: Potassium hydrogen phthalate, 0,05 mol/l solution
A.2 Buffer solution pH 6,9: Potassium dihydrogen phosphate and disodium hydrogen phosphate solution
A.3 Buffer solution pH 9,2: Disodium tetraborate solution
Annex B
B.1 General
B.2 Repeatability
B.3 Reproducibility
Bibliography
Cited references in this standard
Content history
[Superseded]
[Superseded]
DR AS/NZS 1301.421:2020
Please select a variation to view its description.
| Published | 10/07/2020 |
|---|---|
| Pages | 7 |
Please select a variation to view its pdf.
