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OPTIMUM FREQUENCY OF CALIBRATION MONITORING
Citation:
Yfantis, E., G. Flatman, AND F. Garner. OPTIMUM FREQUENCY OF CALIBRATION MONITORING. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-88/021 (NTIS PB88219233), 1988.
Description:
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.)