GAS-CHROMATOGRAPHIC DETERMINATION OF DELTAMETHRIN IN CROPS

A rapid and economical method is described for the determination of de ltamethrin in wheat, rice, peanuts and corn. It is based on simultaneo us extraction and clean-up on a column packed with alumina and silica gel using n-hexane-ethyl ether (8:2, v/v), followed by a derivatizatio n step and gas-chromatographic analysis, Recoveries from fortified cer eal and peanut samples were determined at four concentration levels an d ranged from 73 to 109%, The detection limits were 0.01 to 0.03 mg/kg . This method simplifies the traditional procedures in terms of sample size, solvent consumption and analysis time.