globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.50119
论文题名:
Probing molecular associations of field-collected and laboratorygenerated soa with nano-desi high-resolution mass spectrometry
作者: O'brien R.E.; Nguyen T.B.; Laskin A.; Laskin J.; Hayes P.L.; Liu S.; Jimenez J.L.; Russell L.M.; Nizkorodov S.A.; Goldstein A.H.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:2
起始页码: 1042
结束页码: 1051
语种: 英语
Scopus关键词: Aerosols ; Experiments ; Nitrogen ; Photooxidation ; Chamber experiments ; Electrospray ionization mass spectrometry ; Gaseous ammonia ; High resolution mass spectrometry ; Molecular associations ; Molecular formula ; Organic nitrogen ; Secondary organic aerosols ; Mass spectrometry ; data set ; desorption ; ionization ; laboratory method ; mass spectrometry ; molecular analysis ; organic compound ; photooxidation ; resolution ; California ; Los Angeles [California] ; United States
英文摘要: Aerosol samples from the 2010 CalNex field study in Bakersfield (BF) and Pasadena (LA) were analyzed using positive mode nanospray-desorption electrospray ionization mass spectrometry. Secondary organic aerosol (SOA) produced in a photochemical chamber by photooxidation of diesel (DSL) fuel and isoprene (ISO) under humid, high-NOx conditions, was analyzed for comparison. Three groups of organic compounds with zero, one, or two nitrogen atoms in their molecular formulas (0N, 1N, 2N) were compared in detail. The composition of ambient SOA exhibited greater overlap with DSL than with ISO. The overlap of the chamber experiments with the BF data was relatively consistent throughout the day while the overlap with LA data increased significantly in the noon to 6 P.M. sample, consistent with the SOA plume arriving from downtown Los Angeles. BF samples were more oxidized, containedmore organic nitrogen, and hadmore overlap with the chamber data compared to LA samples. The addition of gaseous ammonia (NH3) to the DSL experiment was necessary to generate many of the 2N compounds observed in BF. This analysis demonstrates that DSL and ISO were important sources but cannot account for all of the observed ambient compounds indicating that other sources of organics were also likely important. © 2012. American Geophysical Union.
资助项目: ATM-0831518 ; CHE-0909227 ; NA10OAR4310104
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63979
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Department of Chemistry, University of California, Berkeley, CA, United States; Department of Chemistry, University of California, Irvine, CA, United States; William R. Wiley Environmental and Molecular Sciences Laboratory, Richland, WA, 99352, United States; Pacific Northwest National Laboratory, Chemical and Materials Sciences Division, WA 99352, United States; Cooperative Institute for Research in Environmental Sciences (CIRES), United States; Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, CO, United States; Scripps Institution of Oceanography, University of California, San Diego, CA, United States; Department of Environmental Science,Policy andManagement, University of California, Berkeley, CA, 94720, United States; Department of Civil and Environmental Engineering, University of California, Berkeley, CA, 94720, United States

Recommended Citation:
O'brien R.E.,Nguyen T.B.,Laskin A.,et al. Probing molecular associations of field-collected and laboratorygenerated soa with nano-desi high-resolution mass spectrometry[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(2)
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