Molecular characterization of water-soluble organic compounds in PM2.5 using ultrahigh resolution mass spectrometry
文献类型：期刊论文
| 作者 | Wu, Chenghao; Yang, Jing; Fu, Qiang; Zhu, Bao; Ruan, Ting; Jiang, Guibin
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2019-06-10 |
| 卷号 | 668页码:917-924 |
| 关键词 | Particulate matter WSOCs Elemental composition Partitioning Hydrophobic property Neutral loss |
| ISSN号 | 0048-9697 |
| 英文摘要 | Water-soluble organic compounds (WSOCs) are a complex mixture of organic components with a variety of chemicals structures that may have significant impacts on the formation process and health hazards of atmospheric fine particles. In this study, the molecular characteristics of WSOCs in PM2.5 were investigated using ultrahigh resolution mass spectrometry. In total 7389 compounds in PM2.5 water extracts were identified, including CHO +/-, CHOS +/-, CHON +/-, CHONS +/-, CH+, CHS+, CHN+ and CHNS+ species. CHO +/- and CHON +/- were the major components in PM2.5 water extracts. S-containing compounds detected in both ionization modes were observed with distinct molecular characteristics. Selective partitioning of WSOCs between PM2.5 water extracts and poly-dimethylsiloxane (PDMS, log D-PDMS = 0.51-3.87) coating phases was found, which was significantly correlated with molecular characteristic ( i.e. double-bond equivalent, number of O and H atoms, O/C ratios, and aromaticity equivalent). The extent of accumulation for negatively charged compounds was generally lower, which related to the existence of polar functional groups, such as hydroxyl, carboxyl, nitrate, and sulfate, as observed by MS/MS fragmentation analysis. (C) 2019 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/42977]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 作者单位 | 1.China Natl Environm Monitoring Ctr, State Environm Protect Key Lab Qual Control Envir, Monitoring, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Chenghao,Yang, Jing,Fu, Qiang,et al. Molecular characterization of water-soluble organic compounds in PM2.5 using ultrahigh resolution mass spectrometry[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,668:917-924. |
| APA | Wu, Chenghao,Yang, Jing,Fu, Qiang,Zhu, Bao,Ruan, Ting,&Jiang, Guibin.(2019).Molecular characterization of water-soluble organic compounds in PM2.5 using ultrahigh resolution mass spectrometry.SCIENCE OF THE TOTAL ENVIRONMENT,668,917-924. |
| MLA | Wu, Chenghao,et al."Molecular characterization of water-soluble organic compounds in PM2.5 using ultrahigh resolution mass spectrometry".SCIENCE OF THE TOTAL ENVIRONMENT 668(2019):917-924. |
入库方式： OAI收割
来源：生态环境研究中心
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