Characterization of trace aerosol compositions produced during the OH radical-initiated photooxidation of β-pinene
Characterization of trace aerosol compositions produced during the OH radical-initiated photooxidation of β-pinene
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OH 自由基引发的 β-蒎烯光氧化过程中产生的微量气溶胶成分的表征
DOI:
10.1016/j.atmosenv.2019.04.060
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发表时间:
2019-08
影响因子:
5
通讯作者:
Bo Yang
中科院分区:
文献类型:
--
作者:
Peng Zhang;Jingyun Huang;Jinian Shu;Pengkun Ma;Bo Yang
The detailed molecular composition of laboratory-generated secondary organic aerosols (SOA) during the high-NO photooxidation of β-pinene (βP) was investigated using a novel thermal desorption dichloromethane-assisted low-pressure photoionization mass spectrometry (TD-CH2Cl2-assisted LPPI-MS) technique. We found that protonated norpinone gave the highest signal intensity, which supported that assumption that this compound was the key oxidation species responsible for promoting βP-SOA formation. In addition to the previously identified monomers (i.e., 2,2-dimethylcyclobutyl-1,3-dicarboxaldehyde (m/z140), pinene aldehyde (m/z150), myrtenol (m/z152), (2,2-dimethyl-3-acetyl)-cyclobutylformate (m/z156), pinene acid (m/z166), and isomers of pinalic-3-acid (m/z170)), two additional nitrogen-containing species (i.e., C10hydroxy nitrate and C10carbonyl nitrate) were also observed atm/zvalues of 214 and 216 in the mass spectrum of βP-SOA. Furthermore, the losses of 18 (H2O), 46 (NO2), and 64 (H2O + NO2) were attributed to the typical fragmentation pathways of the two nitrogen-containing species. Overall, these results not only contribute to an improved understanding of βP-SOA formation, but they also indicate that TD-CH2Cl2-assisted LPPI-MS can be used as a novel detection means to study SOA formation.
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影响因子:
4.6
作者:
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11.4
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通讯作者:
Seinfeld, JH
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11.4
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通讯作者:
Geoffroy Duporté;M. Riva;J. Parshintsev;Enna Heikkinen;L. Barreira;N. Myllys;L. Heikkinen;K. Hartonen;M. Kulmala;M. Ehn;M. Riekkola
影响因子:
5
作者:
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影响因子:
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通讯作者:
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