期刊
ATMOSPHERIC ENVIRONMENT
卷 37, 期 13, 页码 1825-1834出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S1352-2310(03)00064-5
关键词
aerosol; solvent-extractable organic compound; GC-MS; Asian dust storm; Qingdao; China
The solvent extractable organic compounds in 22 seasonal total suspended particulate samples collected in Qingdao, China during June 2001-May 2002 were analyzed using gas chromatograph/mass-selective detector. Included in these samples were three from Asian dust episodes. The characteristics and abundance of the n-alkanes, polycyclic aromatic hydrocarbons and fatty acids were determined. Distinct seasonal variations were detected in the Qingdao samples. The n-alkanes were found to contain substantial amounts of petroleum residues (56.0% in summer, 64.4% in fall, 77.6% in spring and 81.5% in winter). The winter polycyclic aromatic hydrocarbons (PAHs) were from combustion sources including coal burning for space-heating and the average PAH yield was 14.4 times higher than that in summer. The < C-20 homologues, mainly from kitchen emissions and microbial origins, dominated the fatty acid fraction and they constituted 72.8%, 81.9%, 86.9% and 92.6% of the winter, spring, fali and summer samples, respectively. The three Asian dust episode samples possessed characteristics typical of long-distance transport samples with Cmax at C-29 and C-31 and relatively high carbon preference index values (1.85-2.37) for the alkanes, and high plant wax content (38.7-45.5%) in the fatty acids even though the total yields were not substantially larger. (C) 2003 Elsevier Science Ltd. All rights reserved.
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