Voltammetric Detection of Dopamine in Presence of Ascorbic Acid and Uric Acid at Poly (Xylenol Orange) Film-Coated Graphite Pencil Electrode

Figure 2

(a) Cyclic voltammograms of 0.5×10⁻⁵ M dopamine at BGPE (solid line) and at poly(XO)/GPE; First cycle (dashed line) and Second Cycle (dotted line) in 0.2 M PBS of pH 7 at sweep rate 50  mV s⁻¹. (b) Cyclic voltammograms of 0.5×10⁻⁵ M dopamine for 20 multiple cycles in 0.2 M PBS at poly(XO)/GPE at sweep rate 50  mV s⁻¹.

(a)

(b)