The complex compounds and their concentrations in air-borne particulates collected in Chengdu area were studied by GC and GC / MS.The particulates samples were collected on glass-fiber filters using a medium flow aerosol sampler followed by dichloromethane extraction in Soxhlet's extractor for 8 hr.Each of the extracts was concentrated to 1 ml at room temperature under vacuum,and subjected to GC and GC-MS analyses.About one hundred peaks were found on the chromatogram and 77 of them were identified by means...
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