Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Halocarbon Interferences in Chemiluminescent Measurements of NOx.
Author Joshi, Surendra B. ; Bufalini, Joseph J. ;
CORP Author Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1978
Report Number EPA/600/J-78/034;
Stock Number PB-287 567
Additional Subjects Nitrogen oxides ; Gas analysis ; Monitors ; Chemiluminescence ; Performance evaluation ; Halogen organic compounds ; Air pollution ; Chemical analysis ; Air pollution detection ; Reprints
Library Call Number Additional Info Location Last
NTIS  PB-287 567 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 5p
Anomalous NOx responses were observed when halocarbons were irradiated in the presence of oxides of nitrogen. Interferences to chemiluminescent NOx monitor using heated carbon converter were studied for phosgene, tri-chloroacetyl chloride, chloroform, chlorine, and hydrochloric acid. Data show positive interferences in the NOx monitor due to the test compound, either individually or as mixtures. Substituting an FeSO4 converter for the heated carbon converter may solve the problem. This information may be of particular interest to smog chamber researchers and to those making NO2 measurements in areas where halocarbon levels are relatively high. It is speculated that excited O2 molecules may be the interfering compound, but additional work is needed to substantiate this hypothesis.