Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Detection of Atmospheric Pollutants at Parts-Per-Billion Levels by Infrared Spectroscopy.
Author Hanst, Philip L. ; Lefohn, Allen S. ; Gay, Jr., Bruce W. ;
CORP Author National Environmental Research Center, Research Triangle Park, N.C.
Year Published 1973
Stock Number PB-257 715
Additional Subjects Infrared spectroscopy ; Spectroscopic analysis ; Air pollution ; Interferometers ; Infrared detectors ; Water vapor ; Carbon dioxide ; Concentration(Composition) ; Troposphere ; Lower atmosphere ; Micro analysis ; Air pollution detection
Library Call Number Additional Info Location Last
NTIS  PB-257 715 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 52p
Infrared detection of air pollutants has been extended to the parts-per-billion sensitivity range. The increased detection sensitivity results from the use of the scanning Michelson interferometer, cooled solid state detectors, the fast mini-computer, and the multiple pass long path cell. Forming ratios of spectra with the aid of the computer extracts obscure information and minimizes the interferences of atmospheric water and carbon dioxide. Almost all of the significant gaseous pollutants can be measured by the method described, even at concentrations smaller than one part pollutant to one billion parts air.