Record Display for the EPA National Library Catalog


Main Title Field Reliability of the Orsat Analyzer.
Author Mitchell, William J. ; Midgett., M. Rodney ;
CORP Author Environmental Monitoring and Support Lab., Research Triangle Park, N.C. Quality Assurance Branch.
Year Published 1976
Report Number EPA/600/J-76/048;
Stock Number PB-266 313
Additional Subjects Gas detectors ; Air pollution ; Field tests ; Experimental design ; Particles ; Molecular weights ; Concentration(Composition) ; Flue gases ; Carbon dioxide ; Oxygen ; Combustion products ; Industrial wastes ; Reprints ; Orsat analyzer ; Air pollution sampling ; Fyrite
Library Call Number Additional Info Location Last
NTIS  PB-266 313 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 6p
Results from four field based collaborative tests and from one laboratory based collaborative test of the Orsat analytical procedure are discussed. The results from the five collaborative tests demonstrate that routinely using Orsat data to convert particulate emissions from combustion sources to the reference conditions of 50% excess air and 12% carbon dioxide may introduce sizeable errors in the corrected particulate loading. Ways to improve the Orsat apparatus and increase the reliability of the data are suggested. Also reported are the results from field and laboratory studies on the reliability of using individual carbon dioxide and oxygen analyzers of the Fyrite type to determine stack gas molecular weight. The laboratory study, which was done using three cylinders containing mixtures of carbon dioxide, oxygen, carbon monoxide, and nitrogen of known concentration, determined that these analyzers give carbon dioxide and oxygen analyses of sufficient reliability to yield accurate molecular weights. The results of the field studies, which were done on actual flue gas samples, also support this conclusion.