the system consists of three specific chromatography strips ( whatman 31et paper chromatography , silica gel and silicic acid instant thin-layer chromatography ) and three solvents ( chloroform : glacial acetic acid in a 1.00:0.05 v/v mixture , absolute methanol , and 0.9 % sodium chloride ) .
C2936385
silica gel
C0037105
silicic acid