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One-Step Florisil Clean-up and Electron-Capture Gas Chromatographic Procedure for Detection of Additional Insecticide Residues in Milk

Department of Animal Sciences, Purdue University, Lafayette, Indiana

ABSTRACT

A rapid clean-up procedure for analysis of selected chlorinated pesticide residues in dairy products was evaluated for analysis of additional chlorinated and organophosphate insecticide residues. Eleven additional pesticides were successfully detected, using the clean-up procedure in connection with electron-capture gas chromatography. In some cases the insecticide residues were eluted from the clean-up column but could not be quantitated using electron-capture gas chromatography, due to presence of numerous peaks on the chromatographs.