Abstract

TKACH, Volodymyr V. et al. The mathematical description for the process of the electrochemical detection of ascorbic acid over a conducting polymer, doped by a triiodide ion. Rev. colomb. cienc. quim. farm. [online]. 2019, vol.48, n.1, pp.159-169. ISSN 0034-7418.  https://doi.org/10.15446/rcciquifa.v48n1.80072.

The function of the conducting polymer, doped by triiodide ion in the electrochemical determination of the ascorbic acid has been mathematically evaluated. The mathematical model, correspondent to the system, was developed and analyzed by linear stability theory and bifurcation analysis. It was confirmed that the conducting polymer might be an excellent electrode modifier for ascorbic acid determination. The triiodide ion acts as the active substance, and the conducting polymer, as a mediator. The stable steady-state is easy maintain, which is correspondent to the vast zone of the linear dependence between the drug concentration and electrochemical parameter The possibility of oscillatory and monotonic instabilities has also been verified.

Keywords : Ascorbic acid; electrochemical sensors; conducting polymer; triiodide; electrooxidation; stable steady-state.

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