BS ISO 7404-3:2009

This standard BS ISO 7404-3:2009 Methods for the petrographic analysis of coals is classified in these ICS categories:

• 73.040 Coals

This part of ISO 7404 specifies a method for determining the proportions of the maceral groups (and the minerals, if desired) in coals. It is concerned only with 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.