Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title NBS/EPA (National Bureau of Standards/Environmental Protection Agency) Certified Reference Material Performance Audit Program: Status Report 1.
Author Wright, R. S. ; Eaton, W. C. ; Decker, C. E. ;
CORP Author Research Triangle Inst., Research Triangle Park, NC.;Environmental Monitoring Systems Lab., Research Triangle Park, NC.
Year Published 1985
Report Number EPA-68-02-3767; EPA/600/4-85/033;
Stock Number PB85-185833
Additional Subjects Standards ; Auditing ; Chemical analysis ; Environmental surveys ; Carbon monoxide ; Nitrogen oxide(NO) ; Sulfur dioxide ; Concentration(Composition) ; Propane ; Stability ; Certified reference materials
Library Call Number Additional Info Location Last
NTIS  PB85-185833 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 46p
A traceability procedure has been established which allows specialty gas producers to prepare gaseous pollutant Certified Reference Materials (CRMs). The accuracy, stability and homogeneity of the CRMs approach those of NBS Standard Reference Materials (SRMs). Part of this procedure is an independent quality assurance audit of each CRM batch by an EPA-coordinated auditor. As of August 1984, 33 candidate batches had been audited. In general, the agreement between the producer's analytical results and the audit results has been within plus or minus 0.5 percent relative. Additional data suggest that CRMs are stable during their two-year certification periods.