ISO 7404-3:2009 Preview
Methods for the petrographic analysis of coals -- Part 3: Method of determining maceral group composition
This standard was last reviewed and confirmed in 2016. Therefore this version remains current.
ISO 7404-3:2009 specifies a method for determining the proportions of the maceral groups (and the minerals, if desired) in coals. ISO 7404-3:2009 is applicable only to 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.
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