Reference number
ISO 5073:2021
© ISO 2025
International Standard
ISO 5073:2021
Brown coals and lignites — Determination of humic acids
Edition 4
2021-12
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Published (Edition 4, 2021)

Abstract

This document specifies volumetric methods for the determination of total humic acids and free humic acid of brown coals and lignites.

General information

  • Status
     : Published
    Publication date
     : 2021-12
    Stage
    : International Standard published [60.60]
  • Edition
     : 4
    Number of pages
     : 7
  • Technical Committee :
    ISO/TC 27/SC 5
    ICS :
    73.040 
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