title: Gas-liquid chromatographic-mass spectrometric investigation of C 6 -C 20  organic compounds in an urban atmosphere. An application of ultra trace analysis on capillary columns.
mesh_terms: D000327:Adsorption; D000397:Air Pollution / Q000032:analysis*; D001554:Benzene / Q000032:analysis; D001555:Benzene Derivatives / Q000032:analysis; D002849:Chromatography, Gas; D005374:Filtration; D006838:Hydrocarbons / Q000032:analysis*; D013058:Mass Spectrometry; D008722:Methods; D008970:Molecular Weight; D013057:Spectrum Analysis; D013557:Switzerland; D014505:Urban Population
chemical_list: D001555:Benzene Derivatives; D006838:Hydrocarbons; D001554:Benzene