Record Display for the EPA National Library Catalog


Main Title Chemiluminescence Measurement of Reactivity Weighted Ethylene-Equivalent Hydrocarbons.
Author Black, Frank M. ; High, Larry E. ; Fontijn., Arthur ;
CORP Author Environmental Sciences Research Lab., Research Triangle Park, N.C. ;AeroChem Research Labs., Inc., Princeton.
Year Published 1977
Report Number EPA/600/J-77/080;
Stock Number PB-278 339
Additional Subjects Hydrocarbons ; Gas detectors ; Exhaust emissions ; Chemiluminescence ; Gas chromatography ; Design criteria ; Performance evaluation ; Air pollution ; Concentration(Composition) ; Reprints ; Automobile exhaust ; Air pollution detection
Library Call Number Additional Info Location Last
NTIS  PB-278 339 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 6p
A reactive hydrocarbon analyzer (RHA), based on the chemiluminescent reaction of hydrocarbons with oxygen atoms, is used to provide a rapid indication of reactivity weighted hydrocarbon mass in automobile exhaust. Samples are reported by their ethylene-equivalent concentration--the concentration of ethylene which would give the same mass-reactivity product as the exhaust hydrocarbon mixture. These are compared to ethylene-equivalent concentrations obtained by the much more cumbersome procedure of weighting the individual sample hydrocarbons, determined by gas chromatography (GC), by their respective relative short-term photochemical reactivities, summing these results, and equating them to ethylene. Procedures are also described to eliminate a negative interference to the RHA method resultant from H2O quenching of the chemiluminescence emitter. The RHA and GC ethylene-equivalent concentrations correlate within 5%. (Copyright (c) 1977 by the American Chemical Society.)