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Gas-liquid chromatographic determination of permethrin in bovine tissues.

A method is presented for the determination of permethrin (m-phenoxybenzyl cis,trans-(+/-)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate) in bovine tissues. Fat and muscle samples were cleaned up first by liquid-liquid partition on a bonded phase chromatographic column. Final cleanup of fat and muscle was performed on a short Florisil column. Liver, kidney, spleen, and heart tissues only required cleanup on a Florisil column before quantitation of permethrin by electron capture gas-liquid chromatography.