DOI: 10.1016/j.atmosenv.2014.03.045
Scopus记录号: 2-s2.0-84908335516
论文题名: Analysis of secondary organic aerosols from ozonolysis of isoprene by proton transfer reaction mass spectrometry
作者: Inomata S ; , Sato K ; , Hirokawa J ; , Sakamoto Y ; , Tanimoto H ; , Okumura M ; , Tohno S ; , Imamura T
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 97 起始页码: 397
结束页码: 405
语种: 英语
英文关键词: Criegee intermediate
; Isoprene ozonolysis
; Partitioning
; Proton transfer reaction mass spectrometry
; Secondary organic aerosol
Scopus关键词: Criegee intermediates
; Ozonolysis
; Partitioning
; Proton-transfer reaction mass spectrometries
; Secondary organic aerosols
; hydroperoxide
; isoprene
; semi volatile organic compound
; unclassified drug
; volatile organic compound
; aerosol composition
; atmospheric pollution
; carboxylic acid
; filter
; isoprene
; mass spectrometry
; ozone
; volatile organic compound
; aldol reaction
; Article
; chemical reaction
; controlled study
; desorption
; equilibrium constant
; ionization
; limit of detection
; mass spectrometry
; molecular weight
; oxidation
; ozonolysis
; proton transfer reaction mass spectrometry
; proton transport
; reaction analysis
; secondary organic aerosol
; simulation
; temperature
; troposphere
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: To understand the mechanism of formation of the secondary organic aerosols (SOAs) produced by the ozonolysis of isoprene, proton transfer reaction mass spectrometry (PTR-MS) was used to identify the semi-volatile organic compounds (SVOCs) produced in both the gaseous and the aerosol phases and to estimate the gas-aerosol partitioning of each SVOC in chamber experiments. To aid in the identification of the SVOCs, the products were also studied with negative ion-chemical ionization mass spectrometry (NI-CIMS), which can selectively detect carboxylic acids and hydroperoxides. The gaseous products were observed by on-line PTR-MS and NI-CIMS, whereas the SVOCs in SOAs collected on a filter were vaporized by heating the filter and were then analysed by off-line PTR-MS and NI-CIMS. The formation of oligomeric hydroperoxides involving a Criegee intermediate as a chain unit was observed in both the gaseous and the aerosol phases by NI-CIMS. PTR-MS also detected oligomeric hydroperoxides as protonated molecules from which a H2O molecule was eliminated, [M-OH]+. In the aerosol phase, oligomers involving formaldehyde and methacrolein as chain units were observed by PTR-MS in addition to oligomeric hydroperoxides. The gas-aerosol partitioning of each component was calculated from the ion signals in the gaseous and aerosol phases measured by PTR-MS. From the gas-aerosol partitioning, the saturated vapour pressures of the oligomeric hydroperoxides were estimated. Measurements by a fast-mobility-particle-sizer spectrometer revealed that the increase of the number density of the particles was complete within a few hundred seconds from the start of the reaction. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80582
Appears in Collections: 气候变化事实与影响
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作者单位: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, Japan; Faculty of Environmental Earth Science, Hokkaido University, Kita 10 Nishi 5, Sapporo, Hokkaido, Japan; Research Fellow of the Japan Society for the Promotion of Science, Japan; Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto, Japan; Graduate School of Agriculture, Kyoto University, Kitashirakawa Oiwake-Cho, Sakyo-ku, Kyoto, Japan
Recommended Citation:
Inomata S,, Sato K,, Hirokawa J,et al. Analysis of secondary organic aerosols from ozonolysis of isoprene by proton transfer reaction mass spectrometry[J]. Atmospheric Environment,2014-01-01,97