BS 6127-5:1995 Petrographic analysis of bituminous coal and anthracite - Part 5. Method of determining microscopically the reflectance of vitrinite
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This part of ISO 7404 specifies the method for deter-
mining microscopically the maximum and random
reflectance in oil of polished surfaces of the vitrinite
component of coals. The method is applicable to ei-
ther coals from single seams or coal blends covering
the whole range of bituminous coal and anthracite.
By itself, this method is unsuitable for determining the
proportion of components in a blend, particularly
when the components have dissimilar measurable
vitrinite contents.
The method necessitates the identification of vitrinite
by the operator. Reflectance measurements on
vitrinite obtained by interpreting the results of a com-
puterized automated system of microscopic analysis
are outside the scope of this part of ISO 7404.