ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Sensitive voltammetric method for the fast analysis of the antioxidant pyrogallol using a boron-doped diamond electrode in biofuels

Jaromíra Chýlková, Markéta Tomášková, Lenka Janíková, Renáta Šelešovská, Tomáš Navrátil, and Petra Chudobová

Faculty of Chemical Technology, Institute of Environmental and Chemical Engineering, University of Pardubice, Pardubice, Czech Republic

E-mail: marketa.tomaskova@upce.cz

Abstract: A sensitive voltammetric method for the determination of pyrogallol (PY) was developed employing a boron-doped diamond electrode (BDDE). The composition of the supporting electrolyte was investigated during the development of the methodology. Linear sweep voltammetry (LSV) under the optimized experimental conditions was applied for PY determination with a limit of detection and limit of quantification of 0.85 and 2.82 μmol L⁻¹, respectively. These values are satisfactory for application to real samples. The usability of this method for the quantification of pyrogallol was in range from 2.82 to 296.00 μmol L⁻¹. Finally, the developed method was successfully used for the analysis of real samples of biodiesel produced from rapeseed oil and its blend with diesel fuel. Samples of biodiesel and biodiesel blends were analyzed directly in an electrochemical cell, while samples with very low concentrations of PY in biodiesel were extracted with water using the proposed simple and fast process.

Keywords: Antioxidant; Voltammetry; Pyrogallol; Biofuels; Boron-doped diamond electrode

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-016-0025-3

Chemical Papers 71 (6) 1047–1054 (2017)