DOI: 10.1016/j.atmosenv.2014.11.055
Scopus记录号: 2-s2.0-84983103223
论文题名: Aqueous-phase oxidation of green leaf volatiles by hydroxyl radical as a source of SOA: Product identification from methyl jasmonate and methyl salicylate oxidation
作者: Hansel A ; K ; , Ehrenhauser F ; S ; , Richards-Henderson N ; K ; , Anastasio C ; , Valsaraj K ; T
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 102 起始页码: 43
结束页码: 51
语种: 英语
英文关键词: Green leaf volatile
; Hydroxyl radical
; Methyl jasmonate
; Methyl salicylate
; Photochemical oxidation
Scopus关键词: Atmospheric composition
; Chemical reactions
; Drops
; Evaporation
; High performance liquid chromatography
; Hydrostatic pressure
; Ionization of gases
; Ionization of liquids
; Liquid chromatography
; Mass spectrometry
; Molecular oxygen
; Phase interfaces
; Vapor pressure
; Volatile organic compounds
; Green leaf volatiles
; Hydroxyl radicals
; Methyl jasmonate
; Methyl salicylate
; Photochemical oxidation
; Oxidation
; green leaf volatile
; hydroxyl group
; hydroxyl radical
; jasmonic acid methyl ester
; oxygen
; salicylic acid methyl ester
; unclassified drug
; volatile organic compound
; aerosol
; amino acid
; aqueous solution
; chemical analysis
; evaporation
; hydroxyl radical
; identification method
; leaf
; oxidation
; oxygen
; photochemistry
; salicylate
; vapor pressure
; volatile organic compound
; Article
; chemical structure
; controlled study
; dimerization
; electrospray mass spectrometry
; evaporation
; high performance liquid chromatography
; molecular weight
; photooxidation
; priority journal
; reaction analysis
; secondary organic aerosol
; vapor pressure
; Giardia lamblia virus
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: Green leaf volatiles (GLVs) are a group of biogenic volatile organic compounds (BVOCs) released into the atmosphere by vegetation. BVOCs produce secondary organic aerosol (SOA) via gas-phase reactions, but little is known of their aqueous-phase oxidation as a source of SOA. GLVs can partition into atmospheric water phases, e.g., fog, mist, dew or rain, and be oxidized by hydroxyl radicals ( ˙OH). These reactions in the liquid phase also lead to products that have higher molecular weights, increased polarity, and lower vapor pressures, ultimately forming SOA after evaporation of the droplet. To examine this process, we investigated the aqueous, ˙OH-mediated oxidation of methyl jasmonate (MeJa) and methyl salicylate (MeSa), two GLVs that produce aqueous-phase SOA. High performance liquid chromatography/electrospray ionization mass spectrometry (HPLC-ESI-MS) was used to monitor product formation. The oxidation products identified exhibit higher molecular mass than their parent GLV due to either dimerization or the addition of oxygen and hydroxyl functional groups. The proposed structures of potential products are based on mechanistic considerations combined with the HPLC/ESI-MS data. Based on the structures, the vapor pressure and the Henry's law constant were estimated with multiple methods (SPARC, SIMPOL, MPBPVP, Bond and Group Estimations). The estimated vapor pressures of the products identified are significantly (up to 7 orders of magnitude) lower than those of the associated parent compounds, and therefore, the GLV oxidation products may remain as SOA after evaporation of the water droplet. The contribution of the identified oxidation products to SOA formation is estimated based on measured HPLC-ESI/MS responses relative to previous aqueous SOA mass yield measurements. © 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82119
Appears in Collections: 气候变化事实与影响
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作者单位: Cain Department of Chemical Engineering, Louisiana State University, 110 Chemical Engineering, South Stadium Rd., Baton Rouge, LA, United States; Department of Land, Air and Water Resources, University of California, Plant and Environmental Science Bldg.1110,One Shields Ave., Davis, CA, United States; Audubon Sugar Institute, Louisiana State University AgCenter, 3845 Hwy. 75, St. Gabriel, LA, United States
Recommended Citation:
Hansel A,K,, Ehrenhauser F,et al. Aqueous-phase oxidation of green leaf volatiles by hydroxyl radical as a source of SOA: Product identification from methyl jasmonate and methyl salicylate oxidation[J]. Atmospheric Environment,2015-01-01,102