Determination of Residues of Nine Pyrethroid Pesticides in Vegetable Samples by Capillary Column Gas Chromatography
Cheng Ling-li
Abstract
Cheng Ling-li
Abstract
A method for the extraction,purification and GC determination of nine pyrethroid pesticides used in three kinds of vegetables was studied.The pesticide residues were extracted with acetonitrile,purified by a SFE Florisil-1 g column,and determined with GC-ECD gas chromatography.The method detection limit is 0.0004-- 0.0040mg/kg,the average recovery is 84.3%--101.1%,the relative deviation is 1.5%--2.7%.The analytic results are satisfactory.
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A method for the extraction,purification and GC determination of nine pyrethroid pesticides used in three kinds of vegetables was studied.The pesticide residues were extracted with acetonitrile,purified by a SFE Florisil-1 g column,and determined with GC-ECD gas chromatography.The method detection limit is 0.0004-- 0.0040mg/kg,the average recovery is 84.3%--101.1%,the relative deviation is 1.5%--2.7%.The analytic results are satisfactory.
Key concepts: Chromatography, Pyrethroid, Chemistry, Gas chromatography, Detection limit, Pesticide, Pesticide residue, Capillary gas chromatography