Resumo

TKACH, Volodymyr V. et al. The theoretical analysis of the possibility of the electrochemical determination of saccharin, assisted by vanadium (III) oxyhydroxide. Rev. colomb. cienc. quim. farm. [online]. 2019, vol.48, n.1, pp.170-180. ISSN 0034-7418.  https://doi.org/10.15446/rcciquifa.v48n1.80073.

By means of the theoretical mechanistic analysis, the possibility of the use of vanadium oxyhydroxide as electrode modifier for saccharin electrochemical determination has been evaluated. The electroanalytical process is realizing by a cathodic route. The correspondent mathematical model has been analyzed by means of the linear stability theory and bifurcation analysis. The analysis of the model has shown that the vanadium oxyhydroxide is an efficient electrode modifier for saccharin electrochemical detection in pH sufficiently low to maintain the process, but insufficiently acidic to dissolve the oxyhydroxide. The causes for the oscillatory and monotonic instabilities have also been derived.

Palavras-chave : Saccharin; chemically modified electrodes; trivalent vanadium oxyhydroxide; electrochemical sensors; stable steady-state.

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