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Abstract
A simple spectrophotometric method is proposed for the simultaneous quantification of the ozone (O3) and hydrogen peroxide (H2O2) mixture, the so-called peroxone. This method is based on the measurements of the absorbance of the produced by the oxidation of I– by peroxone. The oxidation rates of I– by O3 and H2O2 are largely different and pH-dependent and, moreover, the oxidation of I– by H2O2 can be accelerated by a molybdate catalyst. In addition, the present method was successfully applied at concentrations as low as 10 µM for the analysis of a real peroxone sample prepared by electrolysis of water.
Acknowledgments
The present work was supported financially by Grant-in-Aid for Scientific Research (A) (No. 10305064) to T. Ohsaka, from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.