Coal — Methods for petrographic analysis — Part 3: Method of determining maceral group composition
STANDARD published on 27.10.2025
Designation standards: ISO 7404-3:2025-ed.4.0
Publication date standards: 27.10.2025
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: International technical standard
Category: Technical standards ISO
Description / Abstract: This document specifies a method for determining the proportions of the maceral groups (and the minerals, if desired) in coals. It is concerned only with determinations made on polished particulate blocks using incident white light. For lower-rank coals, the additional use of the fluorescence mode is necessary to identify liptinites.