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)
- 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
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Conference
·
Thu Nov 30 23:00:00 EST 1995
·
OSTI ID:126307
Related Subjects
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ABSORPTION SPECTROSCOPY
ACETALDEHYDE
AIR POLLUTION
AIR POLLUTION MONITORING
ALDEHYDES
CALIFORNIA
CARBOXYLIC ACIDS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DAILY VARIATIONS
DATA
DEVELOPED COUNTRIES
ECOLOGICAL CONCENTRATION
EXPERIMENTAL DATA
FORMALDEHYDE
FORMIC ACID
HUMIDITY
INFORMATION
LIQUID COLUMN CHROMATOGRAPHY
MONITORING
MONOCARBOXYLIC ACIDS
NORTH AMERICA
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
POLLUTION
QUANTITATIVE CHEMICAL ANALYSIS
SAMPLE PREPARATION
SEASONAL VARIATIONS
SEPARATION PROCESSES
SPECTRA
SPECTROSCOPY
ULTRAVIOLET SPECTRA
USA
VARIATIONS
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ABSORPTION SPECTROSCOPY
ACETALDEHYDE
AIR POLLUTION
AIR POLLUTION MONITORING
ALDEHYDES
CALIFORNIA
CARBOXYLIC ACIDS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DAILY VARIATIONS
DATA
DEVELOPED COUNTRIES
ECOLOGICAL CONCENTRATION
EXPERIMENTAL DATA
FORMALDEHYDE
FORMIC ACID
HUMIDITY
INFORMATION
LIQUID COLUMN CHROMATOGRAPHY
MONITORING
MONOCARBOXYLIC ACIDS
NORTH AMERICA
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
POLLUTION
QUANTITATIVE CHEMICAL ANALYSIS
SAMPLE PREPARATION
SEASONAL VARIATIONS
SEPARATION PROCESSES
SPECTRA
SPECTROSCOPY
ULTRAVIOLET SPECTRA
USA
VARIATIONS