Document Detail


Effect of acidity on secondary organic aerosol formation from isoprene.
MedLine Citation:
PMID:  17822103     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
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:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Environmental science & technology     Volume:  41     ISSN:  0013-936X     ISO Abbreviation:  Environ. Sci. Technol.     Publication Date:  2007 Aug 
Date Detail:
Created Date:  2007-09-07     Completed Date:  2007-11-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0213155     Medline TA:  Environ Sci Technol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5363-9     Citation Subset:  IM    
Affiliation:
Department of Chemistry and Departments of Chemical Engineering and Environmental Science and Engineering, California Institute of Technology, Pasadena, California 91125, USA.
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MeSH Terms
Descriptor/Qualifier:
Aerosols / 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:
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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