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Interpretation of High-Resolution Gas Chromatography and High-Resolution Gas Chromatography / Mass Spectrometry Data Acquired from Atmospheric Organic Aerosol Samples

Mazurek, Monica A. and Cass, Glen R. and Simoneit, Bernd R. T. (1989) Interpretation of High-Resolution Gas Chromatography and High-Resolution Gas Chromatography / Mass Spectrometry Data Acquired from Atmospheric Organic Aerosol Samples. Aerosol Science and Technology, 10 (2). pp. 408-420. ISSN 0278-6826. http://resolver.caltech.edu/CaltechAUTHORS:20160722-083229979

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Abstract

Major chemical features of the solvent-soluble organic aerosol carbon fraction (i.e., carbon range C_8–C_(36)) are quantified and identified by high-resolution gas chromatography (HRGC) and high-resolution gas chromatography / mass spectrometry (HRGC / MS). Through these methods, bulk characteristics of the atmospheric aerosol are denned and reveal information relating to seasonal variations and specific source contributions to the atmospheric organics complex mixture. Fine aerosol samples from West Los Angeles, CA show lowest monthly average ambient concentrations of the total extractable organic carbon fraction during summer (e.g., 2.03 μg/m^3) and highest levels during winter (e.g., 5.18 μg/m^3), when sampled at 6-day intervals over the 1982 annual cycle. Absolute concentrations of the complex solvent-soluble organic acid fraction also indicate a similar pattern where a summer minimum and winter maximum are observed. Molecular marker characterizations are performed for the suite of n-alkanes (C_(20)–C_(36)) and for n-alkanoic acids (C_8–C_(30)). Carbon preference index (CPI) values and carbon number maxima (C_(MAX)) are generated for both homologue series. Petroleum residues constitute the major contribution to the organic aerosol, as indicated throughout the entire annual cycle by the low CPI values (1.02–1.83) and by the predominant C_(MAX) (C_(25)) of the n-alkanes. A minor presence of vascular plant wax is also demonstrated by the n-alkane data, where the highest contributions of vascular plant waxes to the fine particulate carbonaceous aerosol fraction occur during late summer and early fall. Biogenic residues contribute the major resolved organic acids present based on the n-alkanoic acid homologue data.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1080/02786828908959280DOIArticle
http://www.tandfonline.com/doi/ref/10.1080/02786828908959280PublisherArticle
Additional Information:© 1989 Elsevier Science Publishing Co. Received: 30 Nov 1987. Accepted: 10 Mar 1988. This research has been supported by the National Science Foundation, Atmospheric Sciences Division (grants ATM 81-16622, ATM 81-18101 and ATM 85-09184), by the U.S. Environmental Protection Agency (Grant number R813277-01-0), and by gifts to the Environmental Quality Laboratory.
Group:Environmental Quality Laboratory
Funders:
Funding AgencyGrant Number
NSFATM 81-16622
NSFATM 81-18101
NSFATM 85-09184
Environmental Protection Agency (EPA)R813277-01-0
Record Number:CaltechAUTHORS:20160722-083229979
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160722-083229979
Official Citation:Monica A. Mazurek , Glen R. Cass & Bernd R. T. Simoneit (1989) Interpretation of High-Resolution Gas Chromatography and High-Resolution Gas Chromatography / Mass Spectrometry Data Acquired from Atmospheric Organic Aerosol Samples, Aerosol Science and Technology, 10:2, 408-420, DOI: 10.1080/02786828908959280
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69158
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:25 Jul 2016 21:30
Last Modified:25 Jul 2016 21:30

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