Air-quality monitoring in Atlanta with the differential optical absorption spectrometer
The U.S. Environmental Protection Agency (EPA) evaluated a differential optical absorption spectrometer (DOAS) long path pollutant monitoring system during July and August of 1990 in Atlanta, GA. Federal Reference Method (FRM) instruments and a gas chromatograph (GC), which measure a number of gas phase air pollutants at a point, were operated concurrently as part of a larger US EPA study of ozone and its precursors in Atlanta. The DOAS was configured to measure the pollutant concentrations of SO2, NO2, O3, nitrous acid, formaldehyde, benzene, toluene and o-xylene over two open paths with 1099 m and 1824 m, respectively, between light source and light receiver. Nitric oxide (NO) and ammonia (NH3) were measured over a third path of only 143 m. In the communication the features of the DOAS system are described and results of the Atlanta, GA evaluation of the system are discussed. Comparisons are made between the DOAS open path measurements and FRM or GC measurements made concurrently at a location near the DOAS light receivers.
- Research Organization:
- Environmental Protection Agency, Research Triangle Park, NC (United States). Atmospheric Research and Exposure Assessment Lab.
- OSTI ID:
- 5470119
- Report Number(s):
- PB-91-191239/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ABSORPTION SPECTRA
AIR POLLUTION
AIR POLLUTION MONITORING
ALDEHYDES
ALKYLATED AROMATICS
AMMONIA
AROMATICS
ATLANTA
BENZENE
CHALCOGENIDES
CHROMATOGRAPHY
DEVELOPED COUNTRIES
FEDERAL REGION IV
FIELD TESTS
FORMALDEHYDE
GAS CHROMATOGRAPHY
GEORGIA
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MONITORING
NATIONAL ORGANIZATIONS
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN HYDRIDES
NITROGEN OXIDES
NITROUS ACID
NORTH AMERICA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
OZONE
POLLUTION
SEPARATION PROCESSES
SPECTRA
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TESTING
TOLUENE
US EPA
US ORGANIZATIONS
USA
XYLENES