Gas phase C2-C10 organic acids concentrations in the Los Angeles atmosphere

Christopher G. Nolte, Matthew Fraser, Glen R. Cass

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The atmospheric concentrations of gas-phase C2-C10 monocarboxylic and benzoic acids are reported in samples collected during a severe Los Angeles area photochemical smog episode. Average urban concentrations are 10-50 x 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.

Original languageEnglish (US)
Pages (from-to)540-545
Number of pages6
JournalEnvironmental Science and Technology
Volume33
Issue number4
DOIs
StatePublished - Feb 15 1999
Externally publishedYes

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Propionic acid
Benzoic acid
Photochemical reactions
Organic acids
Benzoates
Chain length
organic acid
Acetic acid
Acetic Acid
Carbon
Gases
Acids
atmosphere
acid
gas
acetic acid
diurnal variation
spatial variation
carbon
propionic acid

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry
  • Environmental Engineering

Cite this

Gas phase C2-C10 organic acids concentrations in the Los Angeles atmosphere. / Nolte, Christopher G.; Fraser, Matthew; Cass, Glen R.

In: Environmental Science and Technology, Vol. 33, No. 4, 15.02.1999, p. 540-545.

Research output: Contribution to journalArticle

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