Measuring chlorine dioxide with a rotating voltammetric membrane electrode

A new rotating voltammetric membrane electrode has been developed and used to measure chlorine dioxide in water and wastewater. It is capable of detecting low concentrations (<1 mg/L) of chlorine dioxide and is suitable for continuous, automated monitoring. At a chlorine dioxide concentration of 0.30 mg/L, the relative standard deviation is 6.4 percent. This electrode has been compared with the chlorophenol red and iodometric methods for measuring chlorine dioxide.