阳极扫描极化反向催化伏安法测定α-生育酚

用阳极极化的方式在银电极表面形成氧化银纳米粒子，继而以循环电位扫描方法将羧基化石墨烯沉积到该电极表面，成功制备了石墨烯/纳米氧化银/银电极，并应用于碱性溶液中α-生育酚的检测.采用循环伏安法分别对修饰电极和α-生育酚在修饰电极上的催化氧化行为进行了研究.并使用该修饰电极，利用阳极扫描极化反向催化伏安法检测了α-生育酚.实验结果表明，该修饰电极性能稳定，方法灵敏度高，差值峰电流与α-生育酚浓度分别在0.02~0.32 μmol/L 和0.32~4.0 μmol/L范围内存在线性关系，方法检测限达到0.01 μmol/L.
Abstract：Silver oxide nanoparticles were formed at the surface of a silver electrode with anodic polarization, then the carboxyl graphene-nanosheets were electrodeposited on the silver oxide with cyclic potential scanning, and the graphene/silver oxide/silver electrode was successfully prepared and applied in detection of α-tocopherol in the alkaline medium. The electrochemical behavior and the electrocatalytic activity of the modified electrode were investigated using cyclic voltammetry. The α-tocopherol was detected by means of this modified electrode and the positive scan polarization reverse catalytic voltammetry. The experimental results demonstrate that the thus-prepared modified electrode is stable and has high sensitivity. Two linear relationships between the difference value peak current and the α-tocopherol concentration are obtained in the range of 0.02~0.32 μmol/L and 0.32~4.0 μmol/L respectively, with a limit of detection reaching 0.01 μmol/L.