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- W2074320162 abstract "A rapid, sensitive, convenient, and highly quality-assured method is presented for the determination of 19 organochlorine pesticides (OCPs) in small samples (10 ml) of ground water. Samples are initially fortified with 2,4,5,6-tetrachloro-m-xylene (surrogate) and decachlorobiphenyl (retention time marker), then extracted with a 30-μm thickness polydimethylsiloxane solid-phase microextraction fiber. The analytes collected are thermally desorbed in a heated gas chromatographic inlet, separated using independent fused-silica capillary columns (“primary” and “confirmatory”), and detected using electron-capture detection. Two independent statistical procedures were used to evaluate the detection limits, which typically range between 10 and 40 ng l−1, for these analytes. Method performance was also evaluated using two additional protocols employing “performance evaluation” samples, in which authentic ground water samples were fortified to ca. 100 ng l−1 in each of at least six OCPs. The method satisfies additional strict criteria based on uniformity of fiber performance and minimal degradation of the thermally-sensitive analytes endrin and DDT." @default.
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- W2074320162 date "2002-07-01" @default.
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- W2074320162 title "Determination of organochlorine pesticides in ground water using solid-phase microextraction followed by dual-column gas chromatography with electron-capture detection" @default.
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- W2074320162 doi "https://doi.org/10.1016/s0021-9673(02)00592-7" @default.
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