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Using the layer wicking method (TLW method) the electron-donor interactions of surface free energy of the organic liquids: benzene (C 6 H 6 ), toluene C 6 H 5 CH 3 ), and tetrahydrofuran ((CH 2 ) 4 O) was determined.  For this purpose the penetration rate measurements of these liquids in the porous layers of silica gel and alumina were performed.  The obtained values of the electron-donor parameter of surface free energy of the studied organic liquids were compared with the literature data obtained by the direct measurement of the interface tensions of water/organic liquids.

Determination of surface free energy components of organic liquids by the thin layer wicking method