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This paper presents a new approach to evaluation of coal with implementation microwave extraction. It is know from literature that coal is a chemically and physically extremely complex and heterogeneous material, consisting of organic (carbon) and inorganic (minerals) constituents. Our attention was intent on the study of influence of Soxhlet and microwave-assisted extraction in the open-vessel and closed-vessel system, respectively. The microwave extraction (MAE) was realised in microwave furnace with using diffe...