Gas chromatographic determination of benzothiophenes in high-purity sulfur

Resumo

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.