The present research reported the synthesis and electrochemical activities of CuO/GO nanocomposites modified screen-printed graphite electrode (CuO/GO/SPGE) as one of the highly sensitive electrochemical sensors to determine Sudan I. Therefore, we utilized cyclic voltammetry, chronoamperometry, and differential pulse voltammetry (DPV) to examine electrochemical behavior of Sudan I at CuO/GO/SPGE. This modified electrode shows very good electrochemical activities to oxidize Sudan I with a potential shift about 220 mV toward a less positive potential. In optimum conditions, linear calibration ranged between 0.3 and 700.0 µM and limit of detection equal to 0.093 µM is obtained to measure Sudan I concentration using the DPV method. In addition, the modified electrode could be applied to determine simultaneously Sudan I and bisphenol A at potentials of 370 and 510, respectively. It was proved that the proposed CuO/GO/SPGE can be performed to detect Sudan I and bisphenol A into the food as well as water samples, and reasonable results were obtained.

本研究报道了CuO / GO纳米复合材料修饰的丝网印刷石墨电极（CuO / GO / SPGE）的合成和电化学活性，作为测定苏丹红I的高灵敏度电化学传感器之一。因此，我们利用循环伏安法，计时电流法和差动脉冲伏安法（DPV）来研究苏丹I在CuO / GO / SPGE上的电化学行为。这种修饰的电极表现出非常好的电化学活性，可以氧化苏丹I，电位约为220 mV，朝较低的正电位移动。在最佳条件下，使用DPV方法测量苏丹I浓度时，线性校准的范围在0.3到700.0 µM之间，检出限等于0.093 µM。此外，改进的电极可用于同时测定苏丹Ⅰ和双酚A的电位，分别为370和510。实践证明，所提出的CuO / GO / SPGE方法可用于食品和水样中苏丹红I和双酚A的检测，并获得合理的结果。