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BS ISO 5073:2021

BS ISO 5073:2021

$102.76

Brown coals and lignites. Determination of humic acids

Published By Publication Date Number of Pages
BSI 2021 16
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PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
4 Principle
4.1 Total humic acids
10 4.2 Free humic acid
5 Reagents
11 6 Apparatus
7 Sample
8 Procedure
8.1 Extraction of total humic acids
8.2 Extraction of free humic acid
12 8.3 Determination of humic acids in extracts
8.3.1 For total humic acids
8.3.2 For free humic acids
9 Calculation and expression of results
13 10 Precision
10.1 Repeatability limit
11 Test report
14 Annex A (normative) Determination of the ratio of carbon mass fraction to humic acids mass fraction of brown coals and lignites

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BS ISO 5073:2021
$102.76