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ToF‐SIMS analysis of chemical composition of atmospheric aerosols in Beijing
Author(s) -
Jia Feifei,
Wu Kui,
Che Yanli,
Zhang Yanyan,
Zeng Fangang,
Luo Qun,
Yu XiaoYing,
Zhu Zihua,
Zhao Yao,
Wang Fuyi
Publication year - 2020
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6710
Subject(s) - aerosol , environmental chemistry , particulates , chemical composition , beijing , pollution , air pollution , chemistry , environmental science , atmospheric pollution , mass spectrometry , chromatography , ecology , organic chemistry , china , biology , political science , law
Atmospheric aerosols collected from each season in urban Beijing have been studied using time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS). The chemical composition of atmospheric aerosol particles during various atmospheric pollution levels was analyzed and distinguished by principal component analysis (PCA). The differences and sources of the components of the aerosol particles were explored. The results showed that the fine particulate matter from heavily polluted days mainly consists of inorganic salts and organic compounds, such as hydrocarbons, nitrogen‐ or sulfur‐containing hydrocarbons, and their oxides. Samples collected from clean days in the four seasons were also analyzed. Only the samples collected in spring showed a significant difference from the other three seasons. We concluded that the main source of pollution in the Beijing urban area was fossil fuel combustion from motor vehicles.