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UHPLC-Orbitrap mass spectrometric characterization of organic aerosol from a central European city (Mainz, Germany) and a Chinese megacity (Beijing)
Wang, K (Wang, Kai)[ 1,2 ]; Zhang, Y (Zhang, Yun)[ 1 ]; Huang, RJ (Huang, Ru-Jin)[ 2 ]; Cao, JJ (Cao, Junji)[ 2 ]; Hoffman, T (Hoffman, Thorsten)[ 1 ]
2018-09
发表期刊Atmospheric Environment
卷号189页码:22-29
文章类型期刊论文
摘要

Fine urban aerosol particles with aerodynamic equivalent dimeter ≤2.5 μm (PM2.5) were collected in Mainz (a city within the Rhine-Main area, the third largest metropolitan region in Germany) and Beijing (Chinese megacity). A solvent mixture of acetonitrile-water was used to extract the organic aerosol fraction (OA) from the particle samples. The extracts were analyzed by an ultrahigh resolution mass spectrometer (UHRMS) Orbitrap coupled with ultra-high-performance liquid chromatography (UHPLC) both in the negative and positive ion mode. The number of compounds observed in Beijing is a factor of 2–10 higher compared to Mainz. The clear differences on chemical composition of OA in the two cities were observed. The majority of organics in Beijing OA is characterized by lower elemental H/C and O/C ratio but a higher degree of unsaturation and a larger aromaticity equivalent (XC) compared to Mainz OA, suggesting that aromatics, which are related to direct combustion compounds (e.g., oxidized polycyclic aromatic hydrocarbon (PAH)), play an important role for OA in Beijing. A significant number of organosulfates (OSs) with long-carbon chain and low degree of unsaturation were observed in Beijing OA, indicating that long-chain alkanes emitted by vehicle might be their precursors.

关键词Organic Aerosol Orbitrap Ms Uhplc Megacity Molecular Characterization
DOI10.1016/j.atmosenv.2018.06.036
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9560
专题粉尘与环境研究室
通讯作者Huang, RJ (Huang, Ru-Jin)[ 2 ]; Hoffman, T (Hoffman, Thorsten)[ 1 ]
作者单位1.Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10–14, 55128, Mainz, Germany;
2.Key Lab of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China
推荐引用方式
GB/T 7714
Wang, K ,Zhang, Y ,Huang, RJ ,et al. UHPLC-Orbitrap mass spectrometric characterization of organic aerosol from a central European city (Mainz, Germany) and a Chinese megacity (Beijing)[J]. Atmospheric Environment,2018,189:22-29.
APA Wang, K ,Zhang, Y ,Huang, RJ ,Cao, JJ ,&Hoffman, T .(2018).UHPLC-Orbitrap mass spectrometric characterization of organic aerosol from a central European city (Mainz, Germany) and a Chinese megacity (Beijing).Atmospheric Environment,189,22-29.
MLA Wang, K ,et al."UHPLC-Orbitrap mass spectrometric characterization of organic aerosol from a central European city (Mainz, Germany) and a Chinese megacity (Beijing)".Atmospheric Environment 189(2018):22-29.
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