Abstract
A rapid and sensitive analytical technique to quantify carbamate insecticides at nanogram levels is reported using resin column an sorption, and desorption followed by N—P gas—liquid chromatography (GLC) analysis. The carbamates were extracted from natural water by percolation through a column of Amberlite XAD-2, followed by elution with ethyl acetate. The carbamate residues were directly analyzed by GLC with a Tracor Model 702 N—P detector. The recoveries for several carbamates including aminocarb, mexacarbate, carbaryl, propoxur, carbofuran, pirimicarb and methiocarb were from 86% to 108% at 1.0 ppm levels. Only 41 to 58% was recoveredd for methomyl.
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