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以离子液体[BMIM]BF4及银纳米粒子为原料,按一定比例混合修饰玻碳电极,研制了电化学传感器。借助紫外可见分光光度法、循环伏安法及阻抗等手段对电极性能进行了研究。探讨了银纳米粒子与离子液体的比例对修饰电极的性能的影响,对修饰电极进行了优化。电化学传感器应用于实际样品中的抗坏血酸测定,加标回收率可96.3%,RSD为2.3%。
Taking ionic liquid [BMIM] BF4 and silver nanoparticles as raw materials, a certain proportion of mixed glassy carbon electrodes were modified to prepare electrochemical sensors. The electrode properties were studied by means of UV-visible spectrophotometry, cyclic voltammetry and impedance. The effect of the ratio of silver nanoparticles to ionic liquid on the performance of the modified electrode was discussed. The modified electrode was optimized. The electrochemical sensor is applied to the determination of ascorbic acid in the actual sample. The recovery rate of the standard is 96.3% and the RSD is 2.3%.