Abstract
A gas chromatographic method is described for the determination of linear alkylbenzenesulfonate (LAS). LAS was converted into its N-methylanilide derivative by a convenient procedure involving ion-pair extraction followed by amidation, and was analyzed by electron-capture gas chromatography (ECD-GC) using 0.5% OV-17+0.1% FFAP on Uniport HP as the GC column packing. The derivative was very stable and provided excellent ECD response. By ECD-GC method, a linear calibration curve was obtained in the range of 5–1000 ng of LAS. The detection limit of LAS was 0.1 ng as injection amount. LAS in river water could be measured without influence of co-existing substances. The recoveries of LAS in river water were 95–109% and the reproducibility was found to be satisfactory. The LAS contents in river water samples were measured by ECD-GC method and Methylene Blue method, and the analytical results by both methods were compared.
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Kataoka, H., Muroi, N. & Marita, M. Electron-Capture Gas Chromatography of Linear Alkylbenzene-sulfonate as Its N-Methylanilide Derivative. ANAL. SCI. 7, 585–588 (1991). https://doi.org/10.2116/analsci.7.585
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DOI: https://doi.org/10.2116/analsci.7.585