A New Iodate Oscillator: The Landolt Reaction with Ferrocyanide in a CSTR1

Abstract

At a temperature of 30 °C or higher, the reaction of sulfite, iodate, and ferrocyanide exhibits sustained oscillation in a CSTR. The system may be thought of as a perturbation of the bistable Landolt reaction in which the ferrocyanide serves to consume the I2produced in the reduction of iodate, thereby “resetting the clock”. The reaction may be monitored with pH, redox or iodide-selective electrodes, or spectrophotometric measurement of iodine, ferrocyanide, or ferricyanide. © 1986, American Chemical Society. All rights reserved.