ISO 24196:2022
Lignins — Determination of lignin content in kraft lignin, soda lignin and hydrolysis lignin
This document describes a method for the determination of lignin content in kraft, soda, and hydrolysis lignin.
The method is applicable to lignin isolated from a kraft pulping process, a soda pulping process, or lignin obtained by hydrolysis of biomass.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Reagents
7 Sampling
8 Drying
9 Test specimens
10 Procedure
10.1 General
10.2 Hydrolysis
10.3 Filtration
10.4 Acid-insoluble lignin determination
10.5 Acid-soluble lignin determination
11 Calculation
12 Precision
13 Test report
Annex A (informative) Precision
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Reagents
7 Sampling
8 Drying
9 Test specimens
10 Procedure
10.1 General
10.2 Hydrolysis
10.3 Filtration
10.4 Acid-insoluble lignin determination
10.5 Acid-soluble lignin determination
11 Calculation
12 Precision
13 Test report
Annex A (informative) Precision
Bibliography