Based on Figures and, the Ep values increase as different scan rates or concentrations increase, indicating that the oxidation process depends on the difference in concentration and scan rate. The Ep depends on the scan rate or concentration if the oxidation peak potential shifts to more positive potentials. Meanwhile, the non-dependency occurs when the electrode potential remains relatively constant with increasing concentration or scan rate. The calibration curve was plotted against the concentration provided a good fitting of data that can be expressed as Ip (µA)= 33863 C + 16.77 with a correlation coefficient equal to 0.9938, as shown in Figure . The coefficient determination (R² value) indicates the correlation between the ip and scan rate. The closer to 0.0, the weaker the correlation between the values, and the closer to 1.0, the stronger the correlation between the values is.