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 2.
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 1986
Report Number EPA-68-02-4125; EPA/600/4-86/045;
Stock Number PB87-140463
Additional Subjects Chemical analysis ; Performance ; Quality assurance ; Carbon monoxide ; Nitric oxides ; Propane ; Contaminants ; Concentration(Composition) ; Reference materials ; Certification ; Standard reference materials
Library Call Number Additional Info Location Last
NTIS  PB87-140463 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 45p
A traceability procedure has been established which allows specialty gas producers to prepare gaseous pollutant Certified Reference Materials (CRM's). The accuracy, stability and homogeneity of the CRM's approach those of NBS Standard Reference Materials (SRM's). As of October 1986, 36 candidate batches had been audited. In general, the agreement between the producer's analytical results and the audit results have been within + or - 0.5% relative. Additional data suggest that CRM's are stable during their two-year certification periods. The purchaser of a CRM is assured that its accuracy is high because of four features of the CRM program: (1) The general technical procedure for producing and analyzing CRM's has been specified by NBS; (2) CRM's are directly traceable to SRM's which are used as reference standards during the analysis of CRM's; (3) The producer's analytical results are verified by measurements which are performed by an independent auditor; and (4) Both the producer's and the auditor's analytical results must be reviewed and approved by NBS before the CRM's may be sold.