Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Determination of Nonmethane Organic Carbon (NMOC) by Cryogenic Preconcentration and Flame Ionization Detection.
Author Jayanty, R. K. M. ; Blackard, A. ;
CORP Author Research Triangle Inst., Research Triangle Park, NC.;Environmental Monitoring and Support Lab., Research Triangle Park, NC.
Year Published 1981
Report Number EPA-68-02-3431;
Stock Number PB82-232711
Additional Subjects Organic compounds ; Air pollution ; Mathematical models ; Monitoring ; Concentration(Composition) ; Sampling ; Laboratory equipment ; Calibrating ; Revisions ; Design criteria ; Performance evaluation ; Cryogenic preconcentration ; Flame ionization detectors ; Procedures
Library Call Number Additional Info Location Last
NTIS  PB82-232711 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 37p
A variety of photochemical dispersion models have been developed to describe the quantitative relationships between ambient concentrations of precursor organic compounds and subsequent downwind concentrations of ozone. An important application of such models is to determine the degree of control of such organic compounds that is necessary to achieve compliance with ambient air quality standards for ozone. The method described can be used to obtain the requisite upwind NMOC measurements. This method is sort of a compromise between the continuous and GC methods. It combines cryogenic concentrations techniques used in the GC method for high sensitivity with the simple flame ionization detector (FID) for total NMOC measurements without the complex GC system necessary for species resolution. And because of the use of helium carrier gas, the FID has less response variation to various organic compounds than a conventional NMOC analyzer with direct air infusion.