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Abstract
The performance characteristics of commercially available continuous sulfur dioxide monitors were determined. Conductimetric, colorimetric, and coulometric analyzers were investigated. The study was conducted to develop information on such instrument characteristics as stability, sensitivity, response time, collection efficiency, and response to interfering substances. The methodology and apparatus used to determine each operational parameter are described. The instrument performance data developed in this study should be useful to those involved in selection of instrumental methods for monitoring atmospheric sulfur dioxide.