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| Titel |
Characterization of high-resolution aerosol mass spectra of primary organic aerosol emissions from Chinese cooking and biomass burning |
| VerfasserIn |
L.-Y. He, Y. Lin, X.-F. Huang, S. Guo, L. Xue, Q. Su, M. Hu, S.-J. Luan, Y.-H. Zhang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 23 ; Nr. 10, no. 23 (2010-12-06), S.11535-11543 |
| Datensatznummer |
250008938
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| Publikation (Nr.) |
 copernicus.org/acp-10-11535-2010.pdf |
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| Zusammenfassung |
| Aerosol mass spectrometry has proved to be a powerful tool to measure
submicron particulate composition with high time resolution. Factor analysis
of mass spectra (MS) collected worldwide by aerosol mass spectrometer (AMS)
demonstrates that submicron organic aerosol (OA) is usually composed of
several major components, such as oxygenated (OOA), hydrocarbon-like (HOA),
biomass burning (BBOA), and other primary OA. In order to help
interpretation of component MS from factor analysis of ambient OA datasets,
AMS measurements of different primary sources is required for comparison.
Such work, however, has been very scarce in the literature, especially for
high resolution MS (HR-MS) measurements, which performs improved
characterization by separating the ions of different elemental composition
at each m/z in comparison with unit mass resolution MS (UMR-MS)
measurements. In this study, primary emissions from four types of Chinese
cooking (CC) and six types of biomass burning (BB) were simulated
systematically and measured using an Aerodyne High-Resolution Time-of-Flight
AMS (HR-ToF-AMS). The MS of the CC emissions show high similarity, with m/z
41 and m/z 55 being the highest signals; the MS of the BB emissions also
show high similarity, with m/z 29 and m/z 43 being the highest signals. The
MS difference between the CC and BB emissions is much bigger than that
between different CC (or BB) types, especially for the HR-MS. The O/C ratio
of OA ranges from 0.08 to 0.13 for the CC emissions and from 0.18 to 0.26
for the BB emissions. The UMR ions of m/z 43, m/z 44, m/z 57, and m/z 60,
usually used as tracers in AMS measurements, were examined for their HR-MS
characteristics in the CC and BB emissions. In addition, the MS of the CC
and BB emissions are also compared with component MS from factor analysis of
ambient OA datasets observed in China, as well as with other AMS
measurements of primary sources in the literature. The MS signatures of
cooking and biomass burning emissions revealed in this study can be used as
important reference for factor analysis of ambient OA datasets, especially
for the relevant studies in East Asia. |
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