Abstract

SANTOS, Alexsandro Jhones dos et al. Use of Combined Electrochemical Approaches for Mineralization and Detection of Hydroquinone Using PbO₂ Electrodes. J. Mex. Chem. Soc [online]. 2014, vol.58, n.3, pp.356-361. ISSN 1870-249X.

The electrochemical oxidation (EO) of hydroquinone (H₂Q) has been performed, in acidic media, at PbO₂ electrode by galvanostatic electrolysis applying 10 and 30 mAcm⁻². The concentration of H₂Q during its EO was also monitored by differential pulse voltammetry (DPV) by using PbO₂ electrode. The experimental results of galvanostatic electrolyses showed that the performances of the process remarkably depend on the applied current density and in particular, the removal efficiencies obtained at PbO₂ anode were 100% and 80%, at 30 and 10 mAcm⁻², respectively. Additionally, the electroanalytical technique was efficiently used as a detection method during H₂Q electrooxidation and when DPV analyses were compared with HPLC method, it achieved a good fit, confidence intervals and limits.

Keywords : hydroquinone; electrochemical oxidation; differential pulse voltammetry; electroanalysis.

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