Infrared Spectrophotometric Determination of Dioxathion in Cattle Dipwashes

Abstract

Infrared (IR) spectrophotometric determination of dioxathion in cattle dipwashes was checked for its suitability as a routine method. Two calibration curves constructed from absorbances of a series of solutions of dioxathion in carbon tetrachloride and a series of extracts of equivalent quantities of dioxathion from aqueous emulsions were similar (slope 1.8). Several determinations of a field sample gave a mean concentration of 292 ppm or 0.029% and a coefficient of variation of 1.6%. Two determinations of an aqueous emulsion of dioxathion of approximately 400 ppm gave concentrations of 440 and 404 ppm.