Record Display for the EPA National Library Catalog

RECORD NUMBER: 491 OF 833

OLS Field Name OLS Field Data
Main Title Measurement of Non-Methane Hydrocarbons.
Author Saena, Jr, Oscar ; Boldt, Jr, Clarence A. ; Taraz, David S. ;
CORP Author Southwest Research Inst., Houston, Tex.
Year Published 1971
Report Number CPA-70-40; SwRI-21-2811; 0905;
Stock Number PB-205 893
Additional Subjects ( Gas detectors ; Hydrocarbons) ; ( Air pollution ; Hydrocarbons) ; Ionization gages ; Methane ; Gas sampling ; Monitors ; Calibrating ; Air pollution ; Activated carbon ; Air pollution detection
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB-205 893 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 33p
Abstract
Because of recent air pollution laws, there is need of an accurate mobile hydrocarbon analyzer. Measurement of so-called 'non-methane hydrocarbons' was carried out in a mobile laboratory using a flame ionization detector. Total hydrocarbons were measured by running air directly through the detector. Methane was measured by running air through a methane-saturated carbon column which retained all organic contaminants other than methane. The difference was then the 'non-methane hydrocarbons.' Bag sampling may be superior to continuous monitoring, depending on circumstances. Sensitivity appears to be marginal in view of the federal standards. The method is subject to error due to difficulties in calibration, temperature control, and other variables. (Author)