Abstract
Chlorinated dibenzothiophenes can cause environmental problems analogous to chlorinated dibenzodioxins and dibenzofurans. In the analysis of chlorinated dibenzodioxins by gas chromatography—mass spectrometry some unknown chlorinated compounds have been found. The chlorinated dibenzothiophenes have the same m/z values as the corresponding dioxins in low-resolution mass spectrometry and they are found in same planar aromatic compound fraction in alumina and carbon column chromatography. Some chlorinated dibenzothiophenes were synthesized to serve as model compounds in analytical work. High-performance thin-layer chromatography (TLC) with different plates and several eluents was tried to find a separation method for the chlorinated dibenzothiophenes. The experiments showed that reversed-phase TLC with RP-18 plates and acetonitrile—water eluents could separate the chlorinated dibenzothiophenes from many interfering compounds but not completely from complex environmental samples.
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