| Effect of acidity on secondary organic aerosol formation from isoprene. | |
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MedLine Citation:
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PMID: 17822103 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effect of particle-phase acidity on secondary organic aerosol (SOA) formation from isoprene is investigated in a laboratory chamber study, in which the acidity of the inorganic seed aerosol was controlled systematically. The observed enhancement in SOA mass concentration is closely correlated to increasing aerosol acidity (R2 = 0.979). Direct chemical evidence for acid-catalyzed particle-phase reactions was obtained from the SOA chemical analyses. Aerosol mass concentrations for the 2-methyltetrols, as well as the newly identified sulfate esters, both of which serve as tracers for isoprene SOA in ambient aerosols, increased significantly with enhanced aerosol acidity. Aerosol acidities, as measured in nmol of H+ m(-3), employed in the present study are in the same range as those observed in tropospheric aerosol collected from the eastern U.S. |
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Authors:
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Jason D Surratt; Michael Lewandowski; John H Offenberg; Mohammed Jaoui; Tadeusz E Kleindienst; Edward O Edney; John H Seinfeld |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Environmental science & technology Volume: 41 ISSN: 0013-936X ISO Abbreviation: Environ. Sci. Technol. Publication Date: 2007 Aug |
Date Detail:
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Created Date: 2007-09-07 Completed Date: 2007-11-29 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: United States |
Other Details:
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Languages: eng Pagination: 5363-9 Citation Subset: IM |
Affiliation:
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Department of Chemistry and Departments of Chemical Engineering and Environmental Science and Engineering, California Institute of Technology, Pasadena, California 91125, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aerosols
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chemistry* Butadienes / chemistry* Carbon / chemistry Gases / chemistry Hemiterpenes / chemistry* Hydrogen-Ion Concentration Nitric Oxide / chemistry Organic Chemicals / chemistry* Oxidation-Reduction Pentanes / chemistry* Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization |
| Chemical | |
Reg. No./Substance:
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0/Aerosols; 0/Butadienes; 0/Gases; 0/Hemiterpenes; 0/Organic Chemicals; 0/Pentanes; 10102-43-9/Nitric Oxide; 7440-44-0/Carbon; 78-79-5/isoprene |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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