TY - JOUR
T1 - Molecular Characterization and Source Identification of Atmospheric Particulate Organosulfates Using Ultrahigh Resolution Mass Spectrometry
AU - Wang, Kai
AU - Zhang, Yun
AU - Huang, Ru Jin
AU - Wang, Meng
AU - Ni, Haiyan
AU - Kampf, Christopher J.
AU - Cheng, Yafang
AU - Bilde, Merete
AU - Glasius, Marianne
AU - Hoffmann, Thorsten
N1 - Funding Information:
This study was supported by the National Natural Science Foundation of China (NSFC, Grant 41877408 and 91644219), the National Key Research and Development Program of China (2017YFC0212701), and the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) under Grant INST 247/664-1 FUGG. K.W. acknowledges the scholarship from the Chinese Scholarship Council (CSC) and Max Plank Graduate Center with Johannes Gutenberg University of Mainz (MPGC) and thanks Prof. Ulrich Pöschl for his helpful suggestion on this study.
Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/6/4
Y1 - 2019/6/4
N2 - Organosulfates (OSs) have been observed as substantial constituents of atmospheric organic aerosol (OA) in a wide range of environments; however, the chemical composition, sources, and formation mechanism of OSs are still not well understood. In this study, we first created an "OS precursor map" based on the elemental composition of previous OS chamber experiments. Then, according to this "OS precursor map", we estimated the possible sources and molecular structures of OSs in atmospheric PM2.5 (particles with aerodynamic diameter ≤ 2.5 μm) samples, which were collected in urban areas of Beijing (China) and Mainz (Germany) and analyzed by ultrahigh-performance liquid chromatography (UHPLC) coupled with an Orbitrap mass spectrometer. On the basis of the "OS precursor map", together with the polarity information provided by UHPLC, OSs in Mainz samples are suggested to be mainly derived from isoprene/glyoxal or other unknown small polar organic compounds, while OSs in Beijing samples were generated from both isoprene/glyoxal and anthropogenic sources (e.g., long-chain alkanes and aromatics). The nitrooxy-OSs in the clean aerosol samples were mainly derived from monoterpenes, while much fewer monoterpene-derived nitrooxy-OSs were obtained in the polluted aerosol samples, showing that nitrooxy-OS formation is affected by different precursors in clean and polluted air conditions.
AB - Organosulfates (OSs) have been observed as substantial constituents of atmospheric organic aerosol (OA) in a wide range of environments; however, the chemical composition, sources, and formation mechanism of OSs are still not well understood. In this study, we first created an "OS precursor map" based on the elemental composition of previous OS chamber experiments. Then, according to this "OS precursor map", we estimated the possible sources and molecular structures of OSs in atmospheric PM2.5 (particles with aerodynamic diameter ≤ 2.5 μm) samples, which were collected in urban areas of Beijing (China) and Mainz (Germany) and analyzed by ultrahigh-performance liquid chromatography (UHPLC) coupled with an Orbitrap mass spectrometer. On the basis of the "OS precursor map", together with the polarity information provided by UHPLC, OSs in Mainz samples are suggested to be mainly derived from isoprene/glyoxal or other unknown small polar organic compounds, while OSs in Beijing samples were generated from both isoprene/glyoxal and anthropogenic sources (e.g., long-chain alkanes and aromatics). The nitrooxy-OSs in the clean aerosol samples were mainly derived from monoterpenes, while much fewer monoterpene-derived nitrooxy-OSs were obtained in the polluted aerosol samples, showing that nitrooxy-OS formation is affected by different precursors in clean and polluted air conditions.
UR - http://www.scopus.com/inward/record.url?scp=85066809686&partnerID=8YFLogxK
U2 - 10.1021/acs.est.9b02628
DO - 10.1021/acs.est.9b02628
M3 - Journal article
C2 - 31083926
AN - SCOPUS:85066809686
SN - 0013-936X
VL - 53
SP - 6192
EP - 6202
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 11
ER -