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Ambient levels of formaldehyde, acetaldehyde, and formic acid in southern California: Results of a one-year base-line study

Journal Article · · Environmental Science and Technology; (United States)
DOI:https://doi.org/10.1021/es00016a016· OSTI ID:5253477
 [1]
  1. DGA, Inc., Ventura, CA (United States)
Ambient levels of formaldehyde, acetaldehyde (six locations), and formic acid (one location) have been measured over a 1-year period (September 1988-September 1989) in southern California. Samples were collected every sixth day by using DNPH-coated C{sub 18} cartridges and were analyzed by liquid chromatography with UV detection. Method evaluation and validation studies included sampling efficiency, elution recovery, effect of humidity, sampling parameters, and analytical performance. The 24-hour ambient levels of formaldehyde, acetaldehyde, and formic acid reached up to 29, 13, and 8 ppb, respectively, with location-averaged values of 5.0-6.1, 2.9-4.8, and 2.8 ppb, respectively. Concentration ratios were 0.48-0.80 for acetaldehyde/formaldehyde and 0.53 for formic acid/formaldehyde. Seasonal variations are briefly discussed. The data obtained may serve as a base line to evaluate the possible impact of methanol fuel on ambient levels of aldehydes and of formic acid in southern California.
OSTI ID:
5253477
Journal Information:
Environmental Science and Technology; (United States), Journal Name: Environmental Science and Technology; (United States) Vol. 25:4; ISSN ESTHA; ISSN 0013-936X
Country of Publication:
United States
Language:
English