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BS ISO 21436:2020

BS ISO 21436:2020

$102.76

Pulps. Determination of lignin content. Acid hydrolysis method

Published By Publication Date Number of Pages
BSI 2020 22
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The method is applicable to unbleached, bleached and semi-bleached wood pulp with a lignin content above 1 %. It is not generally intended for fully bleached chemical pulp, because the lignin content in these pulps is too low to be determined accurately.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Principle
5 Apparatus
6 Reagents
11 7 Sampling
8 Test Specimens
9 Procedure
9.1 Hydrolysis
9.1.1 General
12 9.1.2 Hydrolysis procedure A
9.1.3 Hydrolysis procedure B
13 9.2 Filtration
9.3 Acid-insoluble lignin determination
9.4 Acid-soluble lignin determination
10 Calculation
14 11 Precision
12 Test Report
16 Annex A (informative) Precision
20 Bibliography

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BS ISO 21436:2020
$102.76