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Characterization and Quantification of Isoprene-Derived Epoxydiols in Ambient Aerosol in the Southeastern United States

Chan, Man Nin and Surratt, Jason D. and Claeys, Magda and Edgerton, Eric S. and Tanner, Roger L. and Shaw, Stephanie L. and Zheng, Mei and Knipping, Eladio M. and Eddingsaas, Nathan C. and Wennberg, Paul O. and Seinfeld, John H. (2010) Characterization and Quantification of Isoprene-Derived Epoxydiols in Ambient Aerosol in the Southeastern United States. Environmental Science and Technology, 44 (12). pp. 4590-4596. ISSN 0013-936X.

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Isoprene-derived epoxydiols (IEPOX) are identified in ambient aerosol samples for the first time, together with other previously identified isoprene tracers (i.e., 2-methyltetrols, 2-methylglyceric acid, C5-alkenetriols, and organosulfate derivatives of 2-methyltetrols). Fine ambient aerosol collected in downtown Atlanta, GA and rural Yorkville, GA during the 2008 August Mini-Intensive Gas and Aerosol Study (AMIGAS) was analyzed using both gas chromatography/quadrupole mass spectrometry (GC/MS) and gas chromatography/time-of-flight mass spectrometry (GC/TOFMS) with prior trimethylsilylation. Mass concentrations of IEPOX ranged from ~1 to 24 ng m^(−3) in the aerosol collected from the two sites. Detection of particle-phase IEPOX in the AMIGAS samples supports recent laboratory results that gas-phase IEPOX produced from the photooxidation of isoprene under low-NO_x conditions is a key precursor of ambient isoprene secondary organic aerosol (SOA) formation. On average, the sum of the mass concentrations of IEPOX and the measured isoprene SOA tracers accounted for about 3% of the organic carbon, demonstrating the significance of isoprene oxidation to the formation of ambient aerosol in this region.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Chan, Man Nin0000-0002-2384-2695
Surratt, Jason D.0000-0002-6833-1450
Claeys, Magda0000-0003-2278-8014
Eddingsaas, Nathan C.0000-0003-1539-5415
Wennberg, Paul O.0000-0002-6126-3854
Seinfeld, John H.0000-0003-1344-4068
Additional Information:© 2010 American Chemical Society. Received February 22, 2010. Revised manuscript received May 2, 2010. Accepted May 4, 2010. Publication Date (Web): May 17, 2010. This work was supported by the Electric Power Research Institute and the Southern Company, Birmingham, AL. We acknowledge all members of the AMIGAS for their support during the field campaign. We thank Arthur W. H. Chan and Christine L. Loza for the generation of the low-NO_x isoprene SOA and Kathryn E. Kautzman for assistance with the GC/TOFMS measurement.
Funding AgencyGrant Number
Electric Power Research Institute (EPRI)UNSPECIFIED
Southern Company (Birmingham, AL)UNSPECIFIED
Issue or Number:12
Record Number:CaltechAUTHORS:20100706-092745845
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Official Citation:Characterization and Quantification of Isoprene-Derived Epoxydiols in Ambient Aerosol in the Southeastern United States Man Nin Chan, Jason D. Surratt, Magda Claeys, Eric S. Edgerton, Roger L. Tanner, Stephanie L. Shaw, Mei Zheng, Eladio M. Knipping, Nathan C. Eddingsaas, Paul O. Wennberg, John H. Seinfeld Environmental Science & Technology 2010 44 (12), 4590-4596
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:18904
Deposited By: Tony Diaz
Deposited On:09 Jul 2010 23:02
Last Modified:03 Oct 2019 01:49

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