Record Display for the EPA National Library Catalog

RECORD NUMBER: 48 OF 49

OLS Field Name OLS Field Data
Main Title Tungstic Acid Technique for Monitoring Nitric Acid and Ammonia in Ambient Air.
Author McClenny, W. A. ; Galley, P. C. ; Braman, R. S. ; Shelley, T. J. ;
CORP Author Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1982
Report Number EPA-600/J-81-462;
Stock Number PB83-191205
Additional Subjects Gas analysis ; Ammonia ; Nitric acid ; Chemical analysis ; Tungstic acids ; Air pollution ; Particles ; Sorbents ; Sampling ; Concentration(Composition) ; Reprints ; Air pollution detection ; Thermal desorption
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB83-191205 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 7p
Abstract
A new measurement procedure has been applied in field studies for monitoring ambient concentrations of HNO3 and NH3. Preconcentration of these gases as well as separation from their particulate forms is achieved by pulling the sampled air through a diffusion tube coated with the amphoteric sorbent, tungstic acid. Thermal desorption releases NH3 as NH3 and HNO3 as NO2 for analysis in a standard chemiluminescence NOx monitor.