Electrochemical Investigation of Catechol at Poly(niacinamide) Modified Carbon Paste Electrode: A Voltammetric Study

Figure 4

(a) Cyclic voltammograms for 0.2 mM CC at poly(niacinamide) MCPE in 0.2 M PBS of pH 7.4 at different scan rate (–; 0.025 Vs⁻¹, 0.05 Vs⁻¹, 0.075 Vs⁻¹, 0.1 Vs⁻¹, 0.125 Vs⁻¹, 0.15 Vs⁻¹, 0.175 Vs⁻¹, and 0.2 Vs⁻¹). (b) The graph of peak current () versus scan rate (). (c) The graph of peak current () versus square root of scan rate.

(a)

(b)

(c)