Subscriber access provided by The University of British Columbia Library
Article
Molecular composition and volatility of organic aerosol in the Southeastern U.S.: implications for IEPOX derived SOA Felipe Lopez-Hilfiker, Claudia Mohr, Emma L. D'Ambro, Anna Lutz, Theran P. Riedel, Cassandra J. Gaston, Siddharth Iyer, Zhenfa Zhang, Avram Gold, Jason Douglas Surratt, Ben Hwan Lee, Theo Kurtén, Weiwei Hu, Jose Luis Jimenez, Mattias Hallquist, and Joel A. Thornton Environ. Sci. Technol., Just Accepted Manuscript • DOI: 10.1021/acs.est.5b04769 • Publication Date (Web): 26 Jan 2016 Downloaded from http://pubs.acs.org on January 30, 2016
Just Accepted “Just Accepted” manuscripts have been peer-reviewed and accepted for publication. They are posted online prior to technical editing, formatting for publication and author proofing. The American Chemical Society provides “Just Accepted” as a free service to the research community to expedite the dissemination of scientific material as soon as possible after acceptance. “Just Accepted” manuscripts appear in full in PDF format accompanied by an HTML abstract. “Just Accepted” manuscripts have been fully peer reviewed, but should not be considered the official version of record. They are accessible to all readers and citable by the Digital Object Identifier (DOI®). “Just Accepted” is an optional service offered to authors. Therefore, the “Just Accepted” Web site may not include all articles that will be published in the journal. After a manuscript is technically edited and formatted, it will be removed from the “Just Accepted” Web site and published as an ASAP article. Note that technical editing may introduce minor changes to the manuscript text and/or graphics which could affect content, and all legal disclaimers and ethical guidelines that apply to the journal pertain. ACS cannot be held responsible for errors or consequences arising from the use of information contained in these “Just Accepted” manuscripts.
Environmental Science & Technology is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Published by American Chemical Society. Copyright © American Chemical Society. However, no copyright claim is made to original U.S. Government works, or works produced by employees of any Commonwealth realm Crown government in the course of their duties.
Page 1 of 33
Environmental Science & Technology
1
Molecular composition and volatility of organic aerosol in the
2
Southeastern U.S.: implications for IEPOX derived SOA
3 4 5
F. D. Lopez-Hilfiker1, C. Mohr1,+, E. L. D’Ambro2, A. Lutz3, T. P. Riedel4, C. J. Gaston1, S. Iyer5, Z. Zhang4, A. Gold4, J. D. Surratt4, B. H. Lee1, T. Kurten5, W.W. Hu6,7, J. Jimenez6,7, M. Hallquist3, J. A. Thornton1*
6
1
Department of Atmospheric Sciences, University of Washington, Seattle, WA, 98195, USA
7
2
Department of Chemistry, University of Washington, Seattle, WA, 98195, USA
8
3
9 10
4
11
5
Department of Chemistry, University of Helsinki, Helsinki, Finland
12
6
Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, USA
13
7
Cooerative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
14 15
+
16
* To whom correspondence should be addressed:
17
KEYWORDS: SOA, FIGAERO, TOF-CIMS, IEPOX, Organic aerosol, Isoprene SOA, Accretion Products
18
Abstract. We present measurements as part of the Southern Oxidant and Aerosol Study (SOAS)
19
during which atmospheric aerosol particles were comprehensively characterized. We present
20
results utilizing a Filter Inlet for Gases and AEROsol coupled to a chemical ionization mass
21
spectrometer (CIMS). We focus on the volatility and composition of isoprene derived organic
22
aerosol tracers and of the bulk organic aerosol. By utilizing the online volatility and molecular
23
composition information provided by the FIGAERO-CIMS, we show that the vast majority of
24
commonly reported molecular tracers of isoprene epoxydiol (IEPOX) derived secondary organic
Department of Chemistry and Molecular Biology, University of Gothenburg, 412 96 Gothenburg, Sweden
Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
Now at: Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, 76344 EggensteinLeopoldshafen, Germany
ACS Paragon Plus Environment
1
Environmental Science & Technology
Page 2 of 33
25
aerosol (SOA) is derived from thermal decomposition of accretion products or other low
26
volatility organics having effective saturation vapor concentrations
