Voltammetric Resolution of Catechol in presence of Hydroquinone at Poly(toluidine blue) Modified Carbon Paste Electrode: A Voltammetric Study

The poly (toluidine blue) modified carbon paste electrode (MCPE) was fabricated for the determination of catechol (CC) and hydroquinone (HQ) by cyclic voltammetric and differential pulse voltammetric techniques. The poly (toluidine blue) MCPE exhibited high sensitivity and selectivity towards the determination of CC and HQ in a binary mixture. The effect of scan rate reveals an adsorption controlled phenomenon at the modified electrode surface. In order to show the selectivity of the electrode, an interference study was performed by varying the concentration of one analyte while keeping other analyte constant which in turn gives a satisfactory result. Overall, a simple experimental procedure for fabricating the poly (toluidine blue) MCPE was reported with the merits of sensitivity, selectivity, reproducibility and anti-fouling property towards the determination of electroactive species.