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ISO 7404-3:2009
M00000259
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ISO 7404-3:2009 Methods for the petrographic analysis of coals - Part 3: Method of determining maceral group composition
standard by International Organization for Standardization, 10/01/2009
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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.