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ISO 7404-3:2025

Coal — Methods for petrographic analysis — Part 3: Method of determining maceral group composition

Publication date:   Oct 27, 2025

General information

60.60   Standard published   Oct 27, 2025

ISO

ISO/TC 27/SC 5 Methods of analysis

International Standard

73.040   Coals

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 7404-3:2009

NOW

PUBLISHED
ISO 7404-3:2025
60.60 Standard published
Oct 27, 2025