Vahid*©A. and Sohrab, M.S. 2020. Combination of reduction with metallic sodium and adsorption with mesoporous materials for re-refining of used insulating oil via experimental design. Analytical Methods in Environmental Chemistry Journal. 3, 01 (Mar. 2020), 27-40. DOI:https://doi.org/10.24200/amecj.v3.i01.74.