British Standards Institution

Source:: ISO
Committee:: W/- - Miscellaneous Standards
Categories:: Coals
Comment period start date:: 25/12/2024
Comment period end date:: 17/02/2025
Number of comments:: 0

Comment by:

17th Feb

Scope

This document specifies a method, using a graticule with 20 crossline intersections, for determining the proportions of microlithotypes, carbominerite and minerite in coals. It applies only to determinations made on polished particulate blocks using reflected white light Additional blue, blue-violet or UV light excitation for better identification of liptinite in fluorescence may be used especially for low rank coals.

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal (Complete)

Proposal start date:

2. Draft (Complete)

Draft start date:

23/10/2024

3. Public Comments

Public Comments start date:

25/12/2024

Public Comments end date:

17/02/2025

Learn more about the standards development process

Standards Development

BS ISO 7404-4 ISO 7404-4 Coal. Methods for petrographic analysis. Part 4: Method of determining microlithotype, carbominerite and minerite composition

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