SYSTEMATIC DESIGN OF CHEMICAL OSCILLATORS .75. A NEW TYPE OF OXYHALOGEN OSCILLATOR - THE BROMITE-IODIDE REACTION IN A CONTINUOUS-FLOW REACTOR

The reaction between bromite and iodide ions in a flow reactor shows two steady states and sustained oscillations in pH, redox potential, and [I-]. The oscillatory behavior is extremely sensitive to the inflow ratio [BrO2-]/[I-], the flow rate, the initial pH of the input solutions, and the stirring rate. Batch experiments suggest that the system behaves in several respects like the analogous chlorite-iodide oscillator. The bromite-iodide system, however, is also a pH oscillator and is the first oxyhalogen oscillator to oscillate in the neutral and basic pH range.