Abstract
A procedure is developed for the determination of benzothiophene, dibenzothiophene, and 4,6-dimethyldibenzothiophene in high-purity sulfur, including liquid-phase microextraction preconcentration, identification by gas chromatography−mass spectrometry, and gas chromatographic determination with flame photometric detection. The rate of microextraction recovery was from 16 to 78%. The limits of detection were 8 × 10–5 wt % for benzophiophene and 2 × 10–5 wt % for dibenzothiophene and 4,6-dimethyldibenzothiophene.
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Original Russian Text © V.A. Krylov, M.F. Churbanov, O.Yu. Chernova, A.Yu. Sozin, 2017, published in Zhurnal Analiticheskoi Khimii, 2017, Vol. 72, No. 6, pp. 552–556.
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Krylov, V.A., Churbanov, M.F., Chernova, O.Y. et al. Gas chromatographic determination of benzothiophenes in high-purity sulfur. J Anal Chem 72, 639–643 (2017). https://doi.org/10.1134/S1061934817060089
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DOI: https://doi.org/10.1134/S1061934817060089