GAS-LIQUID-CHROMATOGRAPHIC DETERMINATION OF M-PHENOXYBENZYL CIS, TRANS-(+/-)-3-(2,2-DICHLOROVINYL)-2,2-DIMETHYLCYCLOPROPANECARBOXYLATE IN AQUEOUS FORMULATIONS
A simple and rapid GLC method was developed for the analysis of aqueous solutions of [the insecticide] FMC 33297 (m-phenoxybenzyl cis,trans-(.+-.)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate). The compound is extracted from aqueous solution with benzene and cleaned up by liquid chromatography. The sample extracts are analyzed by GLC with a flame ionization detector and quantitated by comparing integrator counts of extracts with those of standards. Recoveries of FMC 33297 were 90-100%. The method has good precision (the SD for 4 deteminations of a 0.002394% formulation was 6 .times. 10-6) and is sensitive to 0.00004% active ingredient by weight.