An Alternative Approach to Gas Phase Ozone Determination

A pragmatic, real time procedure to determine gas phase ozone concentration is presented. The procedure requires syringe extraction of an air-ozone sample via a Teflon septum followed by ozone measurement using the indigo method. The results are confirmed by comparison to the standard iodometric technique. The method has a number of potential applications, including as an alternative to continuous gas phase UV monitoring, if UV absorbing compounds other than ozone are present.