基于石墨烯修饰玻碳电极伏安法测定6-苄氨基嘌呤

摘要

In this paper, a novel electrochemical sensor was built to determine 6-benzylaminopurine (6-BAP) by a graphene modified electrodes. Cyclic Voltammogram results indicated that the graphene modified electrodes could significantly reduce the detection potential and increase the response current for 6-BAP. 6-BAP experienced a diffusion control process at the surface of the graphene modified electrode. Under the optimized experimental conditions, a good linear relationship between the currents and the concentrations of 6-BAP in the range of 1.0×10-8~1.0 × 10-6 mol/L of with the detection limit of 5.0 × 10-9 mol/L was obtained. Interferences of some inorganic and organic species on the response have been studied. The standard recovery tests showed that the recovery rate ranging between 91.0%~104.5%. This indicated that this sensor is effective for 6-BAP detection.%该文利用石墨烯修饰电极，构建了一种测定6-苄氨基嘌呤的新型的电化学方法。循环伏安实验表明，石墨烯修饰电极能显著降低6-苄氨基嘌呤的测定电位，提高其响应电流。6-苄氨基嘌呤在石墨烯修饰电极表面的电化学过程为扩散控制。在优化的实验条件下，6-苄氨基嘌呤与峰电流在浓度为1.0×10-8~1.0×10-6 mol/L范围内呈现良好的线性关系，检测限为5.0×10-9 mol/L。考察了一些无机离子和有机化合物对6-苄氨基嘌呤测定的干扰，结果表明该传感器有较好的抗干扰能力。加标回收实验表明该修饰电极的回收率在91.0%~104.5%之间，表明该传感器能用于实际样品的检测。