DOI: 10.1016/j.atmosenv.2014.06.018
Scopus记录号: 2-s2.0-84902439904
论文题名: Early stage composition of SOA produced by α-pinene/ozone reaction: α-Acyloxyhydroperoxy aldehydes and acidic dimers
作者: Witkowski B ; , Gierczak T
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 95 起始页码: 59
结束页码: 70
语种: 英语
英文关键词: Aldol condensation
; Hydroperoxides
; LC-ESI/MS
; Nucleation
; Oligomers
; SOA
; Stable isotopes
; α-Pinene
Scopus关键词: Aerosols
; Condensation reactions
; Dimers
; Electrospray ionization
; Isotopes
; Liquid chromatography
; Mass spectrometry
; Monoterpenes
; Nucleation
; Olefins
; Oligomers
; Ozone
; Aldol condensation
; Hydroperoxides
; LC-ESI/MS
; SOA
; Stable isotopes
; Aldehydes
; aldehyde derivative
; alpha acyloxyhydroperoxy aldehyde
; carboxylic acid
; cyclohexene d 10
; cyclohexene derivative
; dimer
; oligomer
; unclassified drug
; aldehyde
; alkene
; bioreactor
; carboxylic acid
; condensation
; fragmentation
; numerical model
; ozone
; stable isotope
; aldol reaction
; article
; chemical reaction
; chemical structure
; electrospray mass spectrometry
; liquid chromatography
; molecular weight
; ozonolysis
; priority journal
; secondary organic aerosol
; tandem mass spectrometry
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: Composition of the freshly formed secondary organic aerosol (SOA) generated by ozonolysis of cyclohexene, cyclohexene-d10 (model precursors) and α-pinene was studied using liquid chromatography coupled to electrospray ionization tandem mass spectrometry (LC-ESI/MS2). SOA was generated in the flow-tube reactor under the following conditions: 22±2°C, 1atm and reaction time was approx. 30 s. In an attempt to resolve the current ambiguities, regarding the structure of α-pinene SOA nucleating agents, analytical methods for analysis of α-acyloxyhydroperoxy aldehydes and oligomers containing carboxylic group were developed to study the potential nucleating agents. Negatively charged m/z 351, 341, 337, 357 and 367 ions corresponding to the acidic oligomers were detected in freshly formed α-pinene SOA. For the first time, structures and formation mechanism for compounds detected as m/z 337 and 351 ions were proposed. Based on the model precursor analysis (cyclohexene and cyclohexene-d10) it was concluded that these compounds were most likely formed via aldol reaction of the lower molecular weight aerosol components. α-Acyloxyhydroperoxy aldehydes were studied in the SOA samples using previously developed, novel method, based on the prediction of fragmentation spectrum for the compounds of interest. It was concluded that α-acyloxyhydroperoxy aldehydes were not formed in significant quantities. Based on the obtained results, possible SOA formation and growth mechanism is discussed. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80912
Appears in Collections: 气候变化事实与影响
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作者单位: Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Zwirki i Wigury 101, 02-089 Warszawa, Poland
Recommended Citation:
Witkowski B,, Gierczak T. Early stage composition of SOA produced by α-pinene/ozone reaction: α-Acyloxyhydroperoxy aldehydes and acidic dimers[J]. Atmospheric Environment,2014-01-01,95