BS ISO 7404-4:2017 PDF

Methods for the petrographic analysis of coals - Method of determining microlithotype, carbominerite and minerite composition

First page of standard BS ISO 7404-4:2017

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Title (English):

BS ISO 7404-4:2017

Methods for the petrographic analysis of coals - Method of determining microlithotype, carbominerite and minerite composition

Document status:: Withdrawn
Format:: Electronic (PDF)
Publication date:: September 30, 2017
ICS:: 73.040
SKU:: BS ISO 7404-4:2017

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Abstract

1 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 (about 400 nm to 700 nm). Additional blue, blue-violet or UV light excitation (365 nm to 440 nm) for better identification of liptinite in fluorescence may be used especially at low rank coals.

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BS ISO 7404-4:2017 PDF

Abstract

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Abstract

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