Voltammetric Investigation of Catechol and Hydroquinone at Triton X-100 Modified Carbon Paste Electrode

A non-ionic surfactant triton X-100 (TX-100) modified carbon paste electrode (TX-100/CPE) was fabricated for the electrocatalytic oxidation of catechol (CC) and hydroquinone (HQ) by cyclic voltammetric (CV) technique. The study of concentration variation for both CC and HQ was conducted; the lower limit of detection was calculated to be 0.59 µM and 0.56 µM for CC and HQ by CV technique. The fabricated TX-100/CPE was achieved the voltammetric separation of CC and HQ in a mixture by CV and differential pulse voltammetric (DPV) techniques. The effect of scan rate on the binary mixture of CC and HQ was examined; results suggest the electrode process was controlled by the adsorption phenomenon. The elimination of the fouling effect by the oxidised product was achieved by the TX-100/CPE.