The present paper deals with the application of cerium-catalyzed B-Z oscillating chemical system to the determination of indium ion in aqueous solution based on its linear perturbation on the oscillating period. Results showed that the change in the oscillating period is linearly proportional to the concentration of indium ion in the range from 4.98×10-7 to 3.85×10-6 mol L-1, with a correlation coefficient of 0.9984 and a detection limit of 4.96×10-7 mol L-1 under the optimum conditions. Various influencing factors on the determination were also examined and the determination mechanism was discussed.
indium ion; B-Z oscillating chemical system; kinetic determination
