Abstract
Abstract Gas chromatographic detector responses to organophosphorus pesticides (OP) relative to their phosphorus (P) content were studied using packed column isothermal gas chromatography (GC) with flame photometric detection (FPD) in the P mode. The FPD responses relative to the amount of P injected (Responses P) were examined for single and dual flame detectors. Responses P were determined to be dependent upon the OP as well as the solvent. For example, Responses P for dimethoate were 0.26 and 0.38 in acetone and isooctane, respectively, relative to Response P for chlorpyrifos (Dursban) using a dual flame FPD. Responses P did not vary proportionately for each OP tested when the gas flows of the dual flame FPD were varied. This indicates that the FPD itself contributes to the variability of responses of the FPD-GC to the P content of the OP.
Published Version
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