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ISO 7404-4:2017

Current Revision

Methods for the petrographic analysis of coals - Part 4: Method of determining microlithotype, carbominerite and minerite composition

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ISO 7404-4:2017 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.


SDO ISO: International Organization for Standardization
Document Number ISO 7404
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO/TC 27/SC 5
Publish Date Document Id Type View
Not Available ISO 7404-4:2017 Revision