Abstract
Abstract one-step chromatographic cleanup technique for chlorinated insecticides has been developed in which carbon (Nuchar)-Celite mixtures are used. Insecticides are selectively eluted from the adsorbent with 20% (v/v) acetone in ethyl ether. Procedures are described for cleanup of residues in fat up to 0.8 g of fat and for cleanup of extracts of green leafy plant materials. Cleanup is satisfactory for paper chromatography. Aldrin, chlordane, DDD, DDE, DDT, dieldrin, endrin, heptachlor, heptachlor epoxide, Kelthane, lindane, Thiodan, and thiodandiol were recovered quantitatively or nearly so. Methoxychlor and toxaphene were partially recovered.
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