Record Display for the EPA National Library Catalog

RECORD NUMBER: 7 OF 9

OLS Field Name OLS Field Data
Main Title Optimum Frequency of Calibration Monitoring.
Author Yfantis, E. A. ; Flatman, G. T. ; Garner, F. C. ;
CORP Author Lockheed Engineering and Management Services Co., Inc., Las Vegas, NV. ;Nevada Univ., Las Vegas.;Environmental Monitoring Systems Lab., Las Vegas, NV.
Year Published 1988
Report Number EPA-68-03-3249; EPA/600/J-88/021;
Stock Number PB88-219233
Additional Subjects Calibrating ; Standards ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB88-219233 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 09/04/1988
Collation 8p
Abstract
The paper develops an algorithm by which to compute the optimal frequency of calibration monitoring to minimize the total cost of analyzing a set of samples and the required calibration standards. Optimum calibration monitoring is needed because of the high cost and calibration drift of the analyzing equipment. Gas chromatographs with mass spectroscopy equipment give trace analyses with previously unattainable precision, accuracy, and speed of turn-around when properly calibrated and systematically monitored. Calibration monitoring is done by including a known standard every fixed number of samples. Currently, this fixed number, or calibration monitoring frequency, is arbitrarily chosen; however, the paper gives a method to compute the optimal calibration monitoring frequency so that the total analyses costs for both samples and standards will be minimized. (Copyright (c) 1988 Elsevier Science Publishers B.V.)