Electrocatalytic Response of Dopamine at Mannitol and Triton X-100 Modified Carbon Paste Electrode: A Cyclic Voltammetric Study

Present work describes the procedure that has been optimized for the determination of dopamine at Mannitol and TX-100 modified carbon paste electrode by cyclic voltammetric technique is 0.2 M acetate buffer solution at pH 6.0. The carbon paste electrode (CPE) modified with Mannitol and TX-100 showed very good sensitivity for dopamine. The effect of scan rate, concentration, pH variation was studied. Increase of dopamine concentration shows linear increase in redox peak currents. The preparation of the modified electrode was easy and renewed by simple polishing gives very good reproducibility, high stability in its voltammetric response and low detection limit for DA.