Confirmation of Pesticide Residue Identity. I. Derivative Formation for the Confirmation of Photoproducts of Endrin: Hexachloro- and Pentachloro-ketone Pesticide Residues by Gas Chromatography

Abstract

Abstract Chemical conversions followed by GLC analysis are described for the confirmation of residues of 2 photoproducts of endrin, ketones I and II, in water and water-borne samples. These endrin degradation products were treated with potassium tert. -butoxide in tert.-butanol, followed by subsequent silylation or acetylation to the corresponding silyl ether or acetate. By this procedure, levels as low as 0.02- 0.03 ppm of these residues in 25 g fish sample extract or 0.01 ppb in 1 L water extract can be identified. The use of ehromous chloride to confirm these residues is also discussed. GLC data are given for some organochlorinated pesticides and their derivatives on a column of DC-ll/QF-1 and OV-101/OV-210.