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• W1969565299 abstract "A simple, rapid and sensitive GC-MS method for the determination of dithiocarbamate fungicide propineb [polymeric zinc propylenebis (dithiocarbamate)] and an improved HPLC procedure for the simultaneous determination of its main metabolite, propylenethiourea, and ethylenethiourea, the main metabolite of all ethylenedithiocarbamates, in airborne samples are described. The method for the analysis of propineb involves the evolution of carbon disulfide (CS(2)), under acidic conditions in the presence of stannous chloride, extraction of the generated CS(2) into a layer of isooctane which is then analyzed for CS(2) content by GC-MS in SIM mode. Under the optimum conditions, the retention time of CS(2) was 1.89 min and the total time of chromatographic analysis was 5 min. Recoveries from spiking glass microfibre filters (GF/A) and silica gel filters were 86+/-7 (n=9) and 89+/-4 (n=9), respectively. The limit of detection is 0.7 ng per filter, which is equivalent to about 0.8-1.0 ng m(-3) in air. In parallel, an HPLC method with ultraviolet detection is presented for the simultaneous analysis of the metabolites. Separation of the two metabolites was attained in less than 5 min. Recoveries from spiking GF/A and silica gel filters for ethylenethiourea were 100+/-1 (n=3) and 98+/-2 (n=3), respectively, while for propylenethiourea were 102+/-1 (n=3) and 98+/-1 (n=3), respectively. The detection limits are about 36-43 and 40-49 ng m(-3) in air for ethylenethiourea and propylenethiourea, respectively. All the analytes spiked in the filters are proven to be stable for more than one month, at -4 degrees C." @default.
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• W1969565299 date "2007-08-01" @default.
• W1969565299 modified "2023-10-01" @default.
• W1969565299 title "Determination of dithiocarbamate fungicide propineb and its main metabolite propylenethiourea in airborne samples" @default.
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• W1969565299 doi "https://doi.org/10.1016/j.chemosphere.2007.02.006" @default.
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