Application of Poly (Fast Green) Based Sensor for the Detection of Dopamine in presence of Ascorbic Acid and Uric acid

Abstract

The electropolymerisation of fast green was prepared on the surface of graphite pencil electrode using cyclic voltammetric technique. This poly (fast green) modified graphite pencil electrode shows good electrocatalytic activity in the detection of dopamine when compared to bare graphite pencil electrode in 0.2 M phosphate buffer solution of pH 7.0. The effect of scan rate show that the electrode process was diffusion controlled. The concentration and pH effects on the voltammogram of dopamine were studied. The poly (fast green) modified graphite pencil electrode was shows excellency in resolution of dopamine in presence of large excess of ascorbic acid and uric acid concentrations. The interfering study was made by increasing the concentration of one species and keeping concentration of other two species constant. The poly (fast green) film coated electrode shows outstand ing potential difference for dopamine, ascorbic acid and uric acid in their mixture.