Abstract
Gas chromatographic determination of azinphosmethyl and its thermally labile metabolite, azinphosmethyl-oxon, can be achieved with cool on-column injection and element-specific flame photometric detection. This paper presents a method of analysis for airborne residues of azinphosmethyl and azinphosmethyl-oxon in XAD-4 resin extracts using cool on-column injection. Calculated limits of quantitation for the analytical method are 8.1 ng/m3 for azinphosmethyl and 10.2 ng/m3 for azinphosmethyl-oxon. Average percentage recovery and percentage relative standard deviations for 10 replicates were 93±18% for azinphosmethyl and 104±16% for the oxon. This analytical method is rapid, robust and requires a minimum of gas chromatograph injection port maintenance.
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