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 |
DOI | 10.1016/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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