GAS-LIQUID-CHROMATOGRAPHIC DETERMINATION OF ALDICARB, ALDICARB SULFOXIDE AND ALDICARB SULFONE IN SOILS AND WATER USING A HALL ELECTROLYTIC CONDUCTIVITY DETECTOR

A method is described for the determination of individual components of toxic aldicarb residues (aldicarb sulfoxide and aldicarb sulfone) in water and soils using a gas chromatographic method with the Hall electrolytic conductivity detector. Aldicarb and its metabolites were extracted from water by chloroform and from soils by water-acetone and water-methanol mixtures. They were separated on a Florisil column and identified by GLC after conversion into aldicarb sulfone by peracetic acid oxidation. The sensitivity of the method is ca. 0.05 ppm of aldicarb. © 1979.