title: Directly coupled supercritical fluid extraction-gas chromatographic analysis of polycyclic aromatic hydrocarbons and polychlorinated biphenyls from environmental solids.
abstract: A method has been developed for the direct coupling of supercritical fluid extractions with gas chromatography (SFE-GC) that yields good chromatographic peak shapes and quantitative recovery of analytes from environmental solids with a total extraction and analysis time of less than one hour. Maximum sensitivity is achieved and analyte degradation or loss is minimized since the extracted species are quantitatively transferred into a fused-silica capillary gas chromatographic column for cryogenic focusing followed by normal GC analysis using flame ionization, electron-capture, or mass spectrometric (MS) detection. Coupled SFE-GC-MS determinations of polycyclic aromatic hydrocarbons from National Bureau of Standards urban dust (SRM 1649) gave excellent agreement with certified values.
mesh_terms: D002849:Chromatography, Gas; D004391:Dust / Q000032:analysis; D004563:Electrochemistry; D004785:Environmental Pollutants / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D011083:Polycyclic Compounds / Q000032:analysis*
chemical_list: D004391:Dust; D004785:Environmental Pollutants; D011083:Polycyclic Compounds; D011078:Polychlorinated Biphenyls