Separation of a mixture of pesticides:
A combination of pesticides such as aldrin, endrin, lindane, heptachlor, DDT, BHC etc. may be separated on Whatman No. 1 filter paper treated with refined mineral oil in diethyl ether (5% v/v) and washed with 75% aqueous acetone. The mobile phase used is 3:1 methanol-water (v/v). The Rf values for aldrin, heptachlor, DDT, endrin and lindane were found to be 0.37, 0.48, 0.60, 0.62 and 0.89, respectively.