Technical Bulletin No. 0548: Effects of the Photochemical Reactivity of Chlorine Dioxide on Results of Bleach Plant Emissions Testing
Measurements of the concentrations of chlorine and chlorine dioxide in pulp bleach plant vent gases may be made for several purposes, including study of the effectiveness of control devices, and estimation of the release of chlorine and chlorine dioxide to the atmosphere. These measurements are typically made employing an extractive sampling system which includes translucent FEP Teflon tubing to transport the gas sample to the analysis equipment. Field studies conducted by NCASI's West Coast and Southern Regional Center staffs in 1987 showed a loss of chlorine dioxide under certain circumstances of testing which appeared to correspond with exposure of the translucent sample tubing to ambient sunlight.