Record Display for the EPA National Library Catalog

RECORD NUMBER: 9 OF 21

OLS Field Name OLS Field Data
Main Title Evaluation of the EPA reference method for the measurement of non-methane hydrocarbons /
Author Harrison, J. W. ; Timmons, M. L. ; Denyszyn, R. B. ; Decker., C. E.
Other Authors
Author Title of a Work
Harrison, J. W.
Ellis, E. Carol.
CORP Author Research Triangle Inst., Research Triangle Park, N.C.;Environmental Monitoring and Support Lab., Research Triangle Park, N.C.
Publisher United States Environmental Protection Agency, Office of Research and Development, National Environmental Research Center,
Year Published 1977
Report Number EPA-600/4-77-033; EPA-68-02-1800
Stock Number PB-278 296
OCLC Number 49622523
Additional Subjects Hydrocarbons ; Gas detectors ; Gas analysis ; Chemical analysis ; Gas chromatography ; Error analysis ; Air pollution ; Calibrating ; Concentration(Composition) ; Design criteria ; Performance evaluation ; Sampling ; Air pollution detection ; Flame ionization detectors
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=9100B6S1.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJBD ARCHIVE EPA 600-4-77-033 Headquarters Library/Washington,DC 11/04/2013
EJBD  EPA 600-4-77-033 Headquarters Library/Washington,DC 05/30/2017
EKBD  EPA-600/4-77-033 Research Triangle Park Library/RTP, NC 04/19/2002
ELBD RPS EPA 600-4-77-033 repository copy AWBERC Library/Cincinnati,OH 05/08/2019
NTIS  PB-278 296 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 1 volume (various pagings) : illustrations ; 28 cm.
Abstract
Many problems have been reported with the method and instruments presently used to monitor ambient air hydrocarbons. The study reported here was carried out to determine, if possible, the sources of error inherent with the present technique and to make recommendations as to what modifications can be made to eliminate or minimize these errors. A flame ionization detector and gas chromatographic instrument were designed, built and evaluated to determine the effects of operating parameters on hydrocarbon response and the differences in response to various non-methane hydrocarbon (NMHC) species. This instrument was then used in a comparative evaluation with six commercial instruments. The evaluation included determinations of calibration stability and response to various NMHC species. Following measurements with gases from cylinders from commercial sources, the commercial instruments were further compared in a three day test using ambient air. Calibration stability was found to be reasonable, with span shifts of greater than 5% the biggest problem. There were wide differences in responses to different NMHC species. These differences were somewhat reduced by using propane responses as the basis of calibration rather than methane. When ambient air was analyzed there were large discrepancies between analyzer readings which appeared to be related to atmospheric water vapor content. Recommendations are made for changes in technique to minimize analyzer discrepancies.
Notes
Project Officer: E. Carol Ellis. Prepared for the United States Environmental Protection Agency by Research Triangle Institute. Contract Number: 68-02-1800 "June 1977." Includes bibliographical references. "EPA-600/4-77-033."