Active standard | Published: 27/10/2025

ISO 7404-3:2025-ed.4.0

Coal — Methods for petrographic analysis — Part 3: Method of determining maceral group composition
(Charbon — Méthodes d´analyse pétrographique — Partie 3: Méthode de détermination de la composition en groupes de macéraux)

Available languages: English

Available design: electronic design (pdf), Print design

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Detail information

Designation: ISO 7404-3:2025-ed.4.0

Publication date: 27/10/2025

Pages: 8

Country: International technical standard

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Anotation

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.

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