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AIR MONITORING BY DIFFERENTIAL OPTICAL ABSORPTION SPECTROMETRY IN BAYTOWN, TEXAS
Citation:
Conner, C. AIR MONITORING BY DIFFERENTIAL OPTICAL ABSORPTION SPECTROMETRY IN BAYTOWN, TEXAS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-95/022.
Description:
This report documents the results of a field study carried out in Baytown, Texas in August 1993. ne goal of the field study was to evaluate calibration and audit procedures for a differential optical absorption spectrometry (DOAS) system. he other major goal of the study was to compare the long-path DOAS and traditional point monitor systems in an area with elevated pollutant levels. he gases being measured were SO2, NO2, and O3. wo separate DOAS systems were operated and compared to the measurements of two Bets of point monitoring systems. he DOAS was readily calibrated in the field using the apparatus constructed for this study. t was possible to simultaneously calibrate both the DOAS and the point monitor systems at the end of the study indicated no significant change in calibration. ntercomparisons of the data sets from the various monitoring systems were carried out. he agreement between the two DOAS systems and between the two point monitoring systems was excellent. he DOAS-point monitor intercomparison was excellent except when nearby local sources affected one instrument more than another.