EVALUATION OF AMBERLITE XAD-2 AS THE EXTRACTANT FOR CARBAMATE INSECTICIDES FROM NATURAL-WATER

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. © 1979.