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Obtained by the microscopic examination of coal and is a volumetric distribution of macerals in a coal sample. Fine coal (not pulverised) is set into a small block of epoxy-type material and one face is polished. A number of different points on the polished face (usually at least 500) are examined by microscope and the maceral species observed are recorded. The maceral analysis is usually presented as percentages.
Maceral analysis is important because vitrinite and exinite are more reactive than the other species in coal in both combustion and coke making.
