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- W2066164804 abstract "A novel analytical method is reported that combines continuous solid-phase extraction and gas chromatography for the determination of 22 carboxylic acids in water. The highly polar and hydrophilic analytes were preferentially sorbed on a mixture of LiChrolut EN-Supelclean ENVI-18 (1:1) sorbent column and eluted with methanol; this extraction process did not require derivatisation. The extract was analysed by gas chromatography coupled to a flame ionisation detector as well as a mass spectrometer with electron impact (EI) or positive chemical ionisation modes. The highest sensitivity was achieved when using MS-EI, with good linearity in calibration curves and low detection limits (2-40ngL(-1)) for 50mL of sample. The entire procedure from raw aqueous sample to a ready-to-inject methanol solution of the acids requires less than 15min. Another benefit of this method is the good accuracy (recoveries between 93 and 102%) and precision (relative standard deviation, 3.4-6.2%), which allows the determination of carboxylic acids in environmental water and in real chlorinated and ozonated drinking water." @default.
- W2066164804 created "2016-06-24" @default.
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- W2066164804 date "2010-11-01" @default.
- W2066164804 modified "2023-10-11" @default.
- W2066164804 title "Determination of carboxylic acids in water by gas chromatography using several detectors after flow preconcentration" @default.
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- W2066164804 doi "https://doi.org/10.1016/j.chroma.2010.09.075" @default.
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