A passive sampler for atmospheric ozone
- DGA, Inc., Ventura, CA (United States)
A simple, cost-effective passive sampler has been developed for the determination of atmospheric ozone. This passive sampler is based on a colorant which fades upon reaction with ozone, whose concentration can be determined by reflectance measurement of the color change. Direct, on-site measurements are possible, and no chemical analyses are needed. Sampler design and validation studies have been carried out and included quantitative determination of color change vs exposure time (1-8 days), color change vs. ozone concentration (30-350 ppb), and response to changes in sampler configuration that modify the passive sampling rate. With indigo carmine as the colorant, the detection limits are 30 ppb. day and 120 ppb. day using a plastic grid and Teflon filter, respectively, as diffusion barriers. Interferences from nitrogen dioxide, formaldehyde and peroxyacetyl nitrate are 15, 4 and 16%, respectively, thus resulting in a negligible bias when measuring ozone in ambient air.
- OSTI ID:
- 5388789
- Journal Information:
- Journal of the Air and Waste Management Association; (United States), Vol. 42:2; ISSN 1047-3289
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
AIR SAMPLERS
TECHNOLOGY ASSESSMENT
OZONE
AIR POLLUTION MONITORING
DESIGN
FORMALDEHYDE
NITROGEN DIOXIDE
PEROXYACETYL NITRATE
VALIDATION
ALDEHYDES
CHALCOGENIDES
EQUIPMENT
ESTERS
MONITORING
NITRATES
NITRIC ACID ESTERS
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SAMPLERS
TESTING
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
010900 - Coal
Lignite
& Peat- Environmental Aspects