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Gas Phase C_2−C_(10) Organic Acids Concentrations in the Los Angeles Atmosphere

Nolte, Christopher G. and Fraser, Matthew P. and Cass, Glen R. (1999) Gas Phase C_2−C_(10) Organic Acids Concentrations in the Los Angeles Atmosphere. Environmental Science and Technology, 33 (4). pp. 540-545. ISSN 0013-936X. doi:10.1021/es980626d.

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The atmospheric concentrations of gas-phase C_2−C_(10) monocarboxylic and benzoic acids are reported in samples collected during a severe Los Angeles area photochemical smog episode. Average urban concentrations are 10−50 × greater than concentrations observed at a remote background location, indicating an anthropogenic origin for these compounds. Average urban concentrations during the episode were 16.1 μg m^(-3) (6.6 ppb) for acetic acid and 1.67 μg m^(-3) (0.55 ppb) for propionic acid, with progressively lesser amounts as the carbon chain length of the acids is increased. Spatial and diurnal variations in atmospheric organic acids concentrations point to the importance of both direct emissions from primary sources and formation by photochemical reaction of precursor compounds.

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Alternate Title:Gas Phase C2−C10 Organic Acids Concentrations in the Los Angeles Atmosphere
Additional Information:© 1999 American Chemical Society. Received for review June 18, 1998. Revised manuscript received November 11, 1998. Accepted November 13, 1998. We thank the 13 California Institute of Technology graduate students and staff who participated in air monitoring site operations for their assistance; William Bope (South Coast Air Quality Management District) for logistics support in Azusa, Long Beach, and Los Angeles; and Lowell Ashbaugh (California Air Resources Board), Eric Grosjean (DGA Incorporated) and Gervaise McKay (Unisearch Associates) for logistics support in Claremont. 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:4
Record Number:CaltechAUTHORS:20160613-112921434
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Official Citation:Gas Phase C2−C10 Organic Acids Concentrations in the Los Angeles Atmosphere Christopher G. Nolte, Matthew P. Fraser, and Glen R. Cass Environmental Science & Technology 1999 33 (4), 540-545 DOI: 10.1021/es980626d
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67870
Deposited By: George Porter
Deposited On:13 Jun 2016 20:54
Last Modified:11 Nov 2021 03:55

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