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- W1999621243 abstract "Abstract A gas-liquid chromatographic procedure has been developed for the analysis of 2,6-difluorobenzoic acid at picogram levels from fortified pond water. Residues from fortified pond water were extracted using ethyl acetate and derivatized with pentafluorobenzyl bromide. The resulting pentafluorobenzyl ester derivative proved to be highly sensitive to EC-GLC detection. At a signal to noise ratio of 3:1 at maximum sensitivity, the limit of detection for the derivative was 1.6 picograms per injection. Recoveries from fortified pond water for 2,6-difluorobenzoic acid at the 1.00, 0.10, and 0.02 mg/L levels were 105, 105, 102%, respectively. Advantages of the method were short reaction time. facile removal of excess reagent by evaporation to dryness, no column cleanup required at any of the fortification levels studied, low toxicity of reagents, and no explosive hazard cf. preparation of the methyl ester derivative using diazomethane." @default.
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- W1999621243 date "1979-06-01" @default.
- W1999621243 modified "2023-10-12" @default.
- W1999621243 title "Derivatization and GLC Determination of the Sterically Hindered 2,6-Difluorobenzoic Acid in Pond Water" @default.
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- W1999621243 doi "https://doi.org/10.1080/03067317908071173" @default.
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