A Method for Checking Instrument Performance at Remote Sampling Sites |
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| Authors: | George A Jutze Richard J Lewis |
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| Institution: | Air Quality Section, Laboratory of Engineering and Physical Sciences, Division of Air Pollution, Robert A. Taft Sanitary Engineering Center , Cincinnati , Ohio , USA |
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| Abstract: | This paper describes a quality control technique used by the central headquarters operation of the Continuous Air Monitoring Program in an ejjort to insure valid data production from instruments located at remote sampling stations. The procedure consists of preparation of 0.10 to 2.00 ppm mixtures of SO2 or NO2 in duplicate Mylar bags, each encased in a corrugated paper box. These mixtures are analyzed during make-up to insure duplication. One box is shipped to the field station where it is analyzed on-site. The control mixture is analyzed in the central lab at the same time. Correlation between measurements indicates the usefulness of this dynamic calibration check. The techniques used are described and results of the program are presented. |
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