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Air Quality Model Evaluation Data for Organics. 6. C_3−C_(24) Organic Acids

Fraser, M. P. and Cass, G. R. and Simoneit, B. R. T. (2003) Air Quality Model Evaluation Data for Organics. 6. C_3−C_(24) Organic Acids. Environmental Science and Technology, 37 (3). pp. 446-453. ISSN 0013-936X. doi:10.1021/es0209262.

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The atmospheric concentrations of 47 carboxylic acids in the semivolatile and particle phases are quantified in the Los Angeles area, as part of a larger study of the vapor-phase, semivolatile, and particle-phase organic compounds. Variations in the spatial and temporal distributions of acid concentrations are analyzed to determine whether atmospheric formation or primary emissions are responsible for the observed levels. Relatively low molecular weight aliphatic dicarboxylic acids (e.g., butanedioic acid, hexanedioic acid, and propanedioic acid) and some n-alkanoic acids (e.g., n-octanoic acid and n-nonanoic acid) are found at an offshore sampling location at levels comparable to urban area concentrations indicating that these compounds or their atmospheric precursors may be derived from long-range transport or natural background sources. Some aromatic carboxylic acids (e.g., benzoic acid and 1,2-benzenedicarboxylic acid) have spatial and temporal distributions suggesting that formation from anthropogenic emissions of gaseous precursors dominates their atmospheric concentrations. Additionally, the distributions of aliphatic carboxylic acid concentrations known to be emitted from primary sources (e.g., hexadecanoic acid and octadecanoic acid) are consistent with direct emissions as the dominant source of these compounds.

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Alternate Title:Air Quality Model Evaluation Data for Organics. 6. C3−C24 Organic Acids
Additional Information:© 2003 American Chemical Society. Received for review September 6, 2002. Revised manuscript received November 14, 2002. Accepted November 18, 2002. Publication Date (Web): December 18, 2002. This research was supported by the Electric Power Research Institute under agreement RP3189-03 and by the Caltech Center for Air Quality Analysis.
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Electric Power Research Institute (EPRI)RP3189-03
Caltech Center for Air Quality AnalysisUNSPECIFIED
Issue or Number:3
Record Number:CaltechAUTHORS:20160629-151751994
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Official Citation:Air Quality Model Evaluation Data for Organics. 6. C3−C24 Organic Acids M. P. Fraser, G. R. Cass, and, and B. R. T. Simoneit Environmental Science & Technology 2003 37 (3), 446-453 DOI: 10.1021/es0209262
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:68771
Deposited By: Ruth Sustaita
Deposited On:29 Jun 2016 22:50
Last Modified:11 Nov 2021 04:04

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