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- W1970618181 abstract "A new method to determine pesticide residue in water is presented. The described method includes using off-line solid-phase extraction (SPE) and on-line reversed-phase liquid chromatography-gas chromatography (RPLC-GC). An interface, based on a modified programmed temperature vaporizer (PTV) injector, packed with a suitable trapping material, is used for on-line RPLC-GC. The changes made in the PTV injector affect the pneumatic system, sample introduction, and solvent elimination. The new interface is easily capable of automation. Methanol/wate (70/30) is used as the eluent in the LC preseparation step. The LC column flow during elution is different from the flow during the transfer step. The transferred volumes range from 500 to 1400 microL (volume of the fractions of interest). Solvent elimination is almost 100% before the sample reaches the GC column. The described system does not show any variation of the peak retention times. The detection limit for real samples ranges from 0.04 to 1.5 ng/L, using NP detection." @default.
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- W1970618181 date "2000-01-08" @default.
- W1970618181 modified "2023-10-17" @default.
- W1970618181 title "Pesticide Residue Analysis by Off-Line SPE and On-Line Reversed-Phase LC-GC Using the Through-Oven-Transfer Adsorption/Desorption Interface" @default.
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- W1970618181 doi "https://doi.org/10.1021/ac990438l" @default.
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