Abstract
Findings of a study to evaluate the Occupational Safety and Health Administration (OSHA) ion chromatography Method 202 for chlorine dioxide are presented. The OSHA method was chosen for in-depth evaluation because it appeared to offer specificity and sensitivity in the presence of chlorine gas. This study critically evaluates the effects of chlorine, sulfur dioxide, and the pH of the collection solution as related to the recovery of chlorine dioxide as the chlorite ion. Results show that the buffer pH should be maintained above pH 9.5 and chlorine concentration below 20 µg.
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