Comprehensive two-dimensional gas chromatography in the analysis of urban aerosols
Minna Kallio1, Tuulia Hyötyläinen, Mari Lehtonen
1Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, PO Box 55, Helsinki FIN-00014, Finland.
Abstract:
Comprehensive two-dimensional gas chromatography utilising a semi-rotating cryogenic modulator was applied to the analysis of urban aerosols. Samples were collected onto glass fibre filters using a high-volume sampler in Helsinki, Finland. Sample preparation included extraction into n-hexane-acetone mixture and clean-up on silver-impregnated silica column. Analyses were performed with GC x GC-FID and GC x GC-QMS equipment. Linearity of the method was good with R2 values greater than 0.994 for all analytes. Polycyclic aromatic hydrocarbons (PAHs) and oxygenated polycyclic aromatic hydrocarbons (oxy-PAHs) were identified and quantified in urban particulates. PAH and oxy-PAH concentrations ranged from 0.5 to 5.5 ng/m3.
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