Studies on the Interaction of Ion Exchange Resins with Initial Catalyst Concentrations of a Chemical Oscillator using Spectrophotometric and Electrochemical Methods

Resumo

Ion exchange resins are well known because of their vast applications in the processes like water softening, catalysis, waste water treatment, hydrometallurgy and chromatography. In the present investigation based on the interaction of different ion exchangers with ferroin to be used as catalyst in a nonlinear chemical reaction, quantitative estimation of Fe²⁺ was done by loading it on three different ion exchange resins, viz. Dowex Marathon C Na, Amberlite IRC86 and Dowex m4195 at different loading time intervals. The supernatant containing the residual ferroin was separated from ion exchange resins and added directly to the substrate molecule of the chemical oscillator as catalyst and the series of reaction systems were monitored by potentiometry and spectrophotometry and the results obtained were confirmed by advanced cyclic voltammetry as a supportive technique. Thus, the effect of catalyst after its interaction with ion exchange resins at optimal level was monitored. At the same time, it was found that the concentration of ferroin to be involved in the Belousov−Zhabotinsky reaction as a catalyst in the present interactive systems can be estimated up to 10^–5 M and even lower, depending on the experimental conditions.