Abstract:Indoor and outdoor air samples were collected from 9 waiting areas of 3 hospitals in Beijing. Sixty-five kinds of VOCs were identified and quantified by the preconcentrator-GC/MS system. The mean concentration of VOCs ranged from 123.64 to 713.22μg/m3. The major components were alkanes, alkenes and aromatics, and they accounted for 61%~98% of the total content. Ethane, propane, n-butane, i-butane and isopentane were the main alkanes (above 50%).The dominating components of alkenes included ethene, propene, isoprene (about 53%~83%).79%~98% aromatics were made up of benzene, toluene, ethylbenzene, xylenes and styrene. The distribution characteristics of aromatics among waiting areas was quite different. Xylenes (58%±24%) were the most important contributor for F waiting area, while toluene was very high in G and H waiting areas. The indoor/outdoor (I/O) ratios of VOCs concentration were above 1.0 in most sampling sites. I/O ratios of aromatics, halohydrocarbons and cyclanes were much higher than 1.0 in some sampling sites, indicating prominent indoor sources.
骆娜, 刘晓云, 谢鹏, 罗超文, 刘兆荣. 北京市医院候诊区空气中VOCs的污染特征[J]. 中国环境科学, 2010, 30(7): 992-996.
LUO Na, LIU Xiao-Yun, XIE Peng, LUO Chao-Wen, LIU Zhao-Rong. Characterization of VOCs in hospital waiting areas, Beijing. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(7): 992-996.