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TeachMeFinance.com - explain Sample (coal) Sample (coal) The term 'Sample (coal)' as it applies to the area of energy can be defined as ' A representative fraction of a coalbed collected by approved methods, guarded against contamination or adulteration, and analyzed to determine the nature; chemical, mineralogic, and (or) petrographic composition; percentage or parts-per-million content of specified constituents; heat value; and possibly the reactivity of the coal or its constituents'.
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