出版社：National Institute of Occupational Safety and Health
摘要：A new type of determination method for ozone applicable for use in a personal dosimeter was developed utilizing the ozonolysis of trans-stilbene (t-stil-bene). Samples of gas containing ozone were introduced into a pyrex glass tube packed with glass beads coated with fine crystals of purified t-stilbene. Benzoic acid produced from the t-stilbene by ozone was determined by high performance liquid chromatography after dissolution into methanol and separation by filtration from the glass beads and unreacted t-stilbene. The amounts of benzoic acid detected were proportional to ozone concentrations in a range of 0.03 ppm to 0.6 ppm with a variation of 20%, and the detection limit was 0.01 ppm. No interference from nitrogen dioxide was detected. Though the influence of very high humidity was not negligible, the amounts of benzoic acid produced at a given humidity were proportional to the ozone concentrations. This method can therefore be used for monitoring ozone concentrations around 0.1 ppm which is the TLV recommeded by the Japan Association of Industrial Health.
