globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2014JD021955
论文题名:
Molecular characterization of S- and N-containing organic constituents in ambient aerosols by negative ion mode high-resolution Nanospray Desorption Electrospray Ionization Mass Spectrometry: CalNex 2010 field study
作者: O'Brien R.E.; Laskin A.; Laskin J.; Rubitschun C.L.; Surratt J.D.; Goldstein A.H.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 2169897X
出版年: 2014
卷: 119, 期:22
起始页码: 12706
结束页码: 12720
语种: 英语
英文关键词: aerosol ; CalNex 2010 ; mass spectrometry ; nano-DESI ; organonitrate ; organosulfate
Scopus关键词: aerosol ; air quality ; image resolution ; mass spectrometry ; molecular analysis ; particle size ; size distribution ; California ; United States
英文摘要: Samples of ambient aerosols from the 2010 California Research at the Nexus of Air Quality and Climate Change (CalNex) field study were analyzed using negative ion mode Nanospray Desorption Electrospray Ionization High-Resolution Mass Spectrometry (nano-DESI/MS). Four samples per day (6 h each) were collected in Bakersfield, CA on 20-24 June. Four characteristic groups were identified: molecules composed of carbon, hydrogen, and oxygen only (CHO), sulfur- (CHOS), nitrogen- (CHON), and both nitrogen- and sulfur-containing organics (CHONS). The chemical formula and elemental ratios were consistent with the presence of organonitrates, organosulfate, and nitroxy organosulfates in the negative ion mode mass spectra. The number of observed CHO compounds increased in the afternoon samples, suggesting photochemical processing as a source. The average number of CHOS compounds had the smallest changes during the day, consistent with a more broadly distributed source. Both of the nitrogen-containing groups (CHONS and CHON) had greater numbers of compounds in the early morning (midnight to 6 A.M.) and night (6 P.M. to midnight) samples, respectively, consistent with nitrate radical chemistry as a likely source for those compounds. Most of the compounds were found in submicron particles. The size distribution of the number of CHON compounds was bimodal, potentially indicating two types of sources. We conclude that the majority of the compounds observed were secondary in nature with both biogenic and anthropogenic sources. These data are complementary to previous results from positive ion mode nano-DESI/MS analysis of a subset of the same samples providing a more complete view of aerosol chemical composition at Bakersfield. ©2014. American Geophysical Union. All Rights Reserved.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63025
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

Files in This Item:

There are no files associated with this item.


作者单位: Department of Chemistry, University of California, Berkeley, CA, United States; Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Department of Chemistry, University of the Pacific, Stockton, CA, United States; William R. Wiley Environmental and Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, United States; Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, United States; Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States; Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA, United States; Department of Civil and Environmental Engineering, University of California, Berkeley, CA, United States

Recommended Citation:
O'Brien R.E.,Laskin A.,Laskin J.,et al. Molecular characterization of S- and N-containing organic constituents in ambient aerosols by negative ion mode high-resolution Nanospray Desorption Electrospray Ionization Mass Spectrometry: CalNex 2010 field study[J]. Journal of Geophysical Research Atmospheres,2014-01-01,119(22)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[O'Brien R.E.]'s Articles
[Laskin A.]'s Articles
[Laskin J.]'s Articles
百度学术
Similar articles in Baidu Scholar
[O'Brien R.E.]'s Articles
[Laskin A.]'s Articles
[Laskin J.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[O'Brien R.E.]‘s Articles
[Laskin A.]‘s Articles
[Laskin J.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.