A highly sensitive electrochemical sensor was developed for the determination of Bisphenol A (BPA) by immobilizing the aptamer on the glassy carbon electrode which was modified by nitrogen-sulfur-doped graphene quantum dots (N, S-GQDs) and Au nanoparticles. We mainly delved into the density of states of N, S-GQDs and the detection mechanism of sensor. On the basis of the improved detector, we focused on the research of kinetic parameters, such as the activation surface area (A), electron transfer coefficient (α), the standard rate constant (k), diffusion coefficient (D), and surface concentration (Г⁰). Under the optimal conditions, the DPV response of the sensor to BPA was a linear detection range from 0.1 to 10 μM and the detection limit was around 0.03 μM. It was noted that the developed sensor was excellently suitable for measuring BPA in tap water, and the recovery ranged from 82.6 to 107%.

通过将适体固定在玻碳电极上，开发了一种用于测定双酚A（BPA）的高灵敏度电化学传感器，该玻碳电极经氮硫掺杂的石墨烯量子点（N，S-GQDs）和金纳米粒子修饰。我们主要研究了N，S-GQD的状态密度和传感器的检测机制。在改进的探测器的基础上，我们专注于动力学参数的研究，如活化表面积（A），电子传递系数（α），标准速率常数（k），扩散系数（D）和表面浓度（Г ⁰）。在最佳条件下，传感器对BPA的DPV响应为0.1至10μM的线性检测范围，检测极限为0.03μM左右。值得注意的是，开发的传感器非常适合于测量自来水中的BPA，回收率范围为82.6至107％。