Quantitative Determination of Catechol via Cyclic Voltammetry, Convolution-Deconvolution Voltammetry, and Differential Pulse Voltammetry at a Mesoporous Nanostructured Platinum Electrode

The electrochemical quantification of catechol (CC) was performed via cyclic voltammetry (CV), convolution-deconvolution voltammetry, and differential pulse voltammetry (DPV) at nanostructured mesoporous platinum film electrochemically deposited from a hexagonal liquid crystalline template of C16EO8 surfactant in 1.0 M HClO4.The cyclic voltammograms of catechol produced one oxidative peak in the forward sweep of potential coupled with a reductive peak on the reverse sweep potential. The effect of catechol concentration was examined using the various electrochemical methods mentioned before. The modified platinum electrode exhibits good sensitivity for the determination of catechol compound in 1.0 M HClO4. The best performance was found for i-t curve method developed from cyclic voltammetry of CC. It manifests a linear peak current response over the concentration range of 3 to 50 μM, with a detection limit of 2.11 μM and a quantification limit of 7.04 μM confirming the accuracy and sensitivity of this fast and simple method.