抄録
A local concentration of the OH radicals in an interfacial region between the cavitation bubbles and the liquid is derived from the production rate of hydrogen peroxide and iodine in aqueous potassium iodide solutions. The products of hydrogen peroxide and iodine result from the competitive reactions of the OH+OHand the OH+I^-, respectively, because the total yield of the products is independent of solute concentration. At 650 kHz ultrasonic irradiation, 2×10^<-3> M was obtained for the concentration of the OH radicals in the interfacial region, which was 2 orders of magnitude higher than the concentration in the bulk liquid.
