Simultaneous Spectrophotometric Determination of Ozone and Hydrogen Peroxide

A simple, rapid, and highly selective spectrophotometric method for the simultaneous analysis of ozone (O 3 ) and hydrogen peroxide (H 2 O 2 ) is proposed. On the basis of the large difference in the reaction rates of O 3 and H 2 O 2 with I - , a changed absorbance corresponding to the reactions of the two species with I - was observed. This method enables a highly selective simultaneous analysis of O 3 and H 2 O 2 in their coexistence.