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Standard ISO 7404-3:2025-ed.4.0 27.10.2025 preview

ISO 7404-3:2025-ed.4.0

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

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STANDARD published on 27.10.2025


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The information about the standard:

Designation standards: ISO 7404-3:2025-ed.4.0
Publication date standards: 27.10.2025
SKU: NS-1246151
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: International technical standard
Category: Technical standards ISO

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Coals

Annotation of standard text ISO 7404-3:2025-ed.4.0 :

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.

Latest update: 2026-04-26 (Number of items: 2 274 794)
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