Collect. Czech. Chem. Commun. 2009, 74, 1443-1454
Published online 2009-11-29 10:55:42

Polarographic and voltammetric determination of 6-nitrobenzimidazole and mechanism of its electrochemical reduction

Dana Deýlová, Jiří Barek* and Vlastimil Vyskočil

UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Faculty of Science, Charles University, Hlavova 2030, 128 43 Prague 2, Czech Republic


Optimal conditions were found for the determination of 6-nitrobenzimidazole by tast polarography (at 1 × 10–4–1 × 10–6 mol l–1), by differential pulse polarography at dropping mercury electrode (at 1 × 10–4–1 × 10–7 mol l–1), and by differential pulse voltammetry at hanging mercury drop electrode (at 1 × 10–4–1 × 10–8 mol l–1). Practical applicability of the developed methods was verified on the determination of 6-nitrobenzimidazole in drinking water (at 10–8 mol l–1). Coulometry at constant potential and cyclic voltammetry were used for elucidation of the mechanism of electrochemical reduction.

Keywords: 6-Nitrobenzimidazole; Tast polarography; Differential pulse polarography; Differential pulse voltammetry; Cyclic voltammetry; Constant potential coulometry; Electrochemistry.

References: 14 live references.