Record Display for the EPA National Library Catalog

RECORD NUMBER: 34 OF 210

OLS Field Name OLS Field Data
Main Title Collaborative study reference method for measurement of photochemical oxidants in the atmosphere (ozone-ehtylene chemiluminescent method) /
Author McKee, Herbert G. ; Childers, Ralph E. ; Parr., Van B.
Other Authors
Author Title of a Work
Childers, Ralph E.
Parr, Van B.
CORP Author Southwest Research Inst., San Antonio, Tex.;National Environmental Research Center, Research Triangle Park, N.C. Quality Assurance and Environmental Monitoring Lab.
Publisher Quality Assurance and Environmental Monitoring Laboratory, National Environmental Research Center,
Year Published 1975
Report Number EPA 650-4-75-016; SwRI-01-2811(1975); CPA-70-40; EPA-ROAP-26AAF
Stock Number PB-244 105
OCLC Number 42191593
Subjects Air--Pollution--Measurement. ; Carbon monoxide. ; Environmental monitoring.
Additional Subjects Ozone ; Air pollution ; Gas analysis ; Chemiluminescence ; Gas sampling ; Standards ; Performance evaluation ; Calibrating ; Laboratory tests ; Gas sampling ; Statistical analysis ; Experimental design ; Measurement ; Air pollution sampling ; Photochemical oxidants ; Air quality data
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=91009UOW.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJBD ARCHIVE EPA 650-4-75-016 Headquarters Library/Washington,DC 08/22/2017
EJBD  EPA 650-4-75-016 Headquarters Library/Washington,DC 03/28/2019
NTIS  PB-244 105 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 42 pages : illustrations, tables ; 28 cm.
Abstract
This report contains information on collaborative tests to determine the precision and bias of the reference method for measurement of photochemical oxidants as published by the Environmental Protection Agency in the Federal Register, April 30, 1971. In the first phase test, ten collaborators were assembled at a common site to measure (from a common source) ambient and ozone supplemented concentrations over a range from 0 to .510 ppm (O-1000ug/m). The data were analyzed to derive an estimate for the precision of the method. Estimates of the standard deviations of the process for total (ST), between-laboratory (SL) and within-laboratory (SWL) were derived, as well as for the lower detectable limit (LDL). The second phase consisted of a collaborative test involving eleven laboratories to determine the accuracy (bias) of the method. Ozone generating systems(synthetic atmosphere) which had been calibrated by the National Bureau of Standards were supplied to each collaborator. Five concentration levels (known to the test designer) were measured at each laboratory. Ten laboratories completed the test, and useful data were supplied by nine laboratories. Over the range of 0 to .500 parts per million, a systematic negative bias exists in the method. The upper limit of the 95% confidence interval on the observed average values of the concentration levels over all laboratories ranged from 9 to 29 percent below the true values, and the lower limit varied from 20 to 45 percent below the true values.
Notes
"EPA 650-4-75-016." "February 1975." Cover title. Prepared for the U.S. Environmental Protection Agency. Contract Number: 68-02-1098