Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Evaluation of the Sodium Arsenite Method for Measurement of NO2 in Ambient Air.
Author Margeson, John H. ; Beard, Michael E. ; Suggs., Jack C. ;
CORP Author Environmental Research Lab.-Duluth, Minn.
Year Published 1977
Report Number EPA/600/J-77/040;
Stock Number PB-271 767
Additional Subjects Nitrogen dioxide ; Gas analysis ; Air pollution ; Laboratory equipment ; Chemical analysis ; Monitoring ; Performance evaluation ; Concentration(Composition) ; Absorbers(Materials) ; Sodium inorganic compounds ; Reprints ; Air pollution detection ; Sodium arsenite analysis
Library Call Number Additional Info Location Last
NTIS  PB-271 767 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 6p
The sodium arsenite method for measurement of nitrogen dioxide in ambient air was evaluated. The method has a constant-high collection efficiency (82%) for nitrogen dioxide, and is insensitive to normal variations in operating parameters. Nitric oxide and carbon dioxide are positive and negative interferents, respectively. The combined average effect of these interferents, over ambient levels, is a positive bias of 9.9 microgram/cubic m. This bias, although statistically significant, is minor (10%) in relation to the ambient air standard of 100 microgram NO2/cubic m and does not warrant modification of the method to remove the interference.