摘要
该文提出了一种新的过氧化氢电化学传感器的制备方法。利用循环伏安法,在金电极表面电化学沉积一层铁氰酸镍膜(NiHCF),在一定电位条件下,它能催化还原过氧化氢,其响应电流与过氧化氢的浓度呈线性关系。经Nafion修饰后的铁氰酸镍膜性能稳定,能排除多种物质对过氧化氢的干扰。用循环伏安法探讨了Ni、Co和Cu的三种铁氰酸盐修饰电极的性能及电化学特性,并研究了各种实验条件对过氧化氢传感器性能的影响。该传感器制作简单,使用寿命长,在实际试样的回收率测定中,结果满意。
A novel electrochemical sensor has been constructed for the determination of hydrogen peroxide. It was based on catalytic reduction of H2O2 by nikel hexacyanoferrate under a certain applied potential. The response current is linear with the [H2O2] . The nickel hexacyanoferrate modified electrode was further covered with Nafion membrane that could erase the interference. The features and performances of three modified electrodes were investigated by cyclic voltammetry. The effects of assay conditions on performances of Hydrogen Peroxide sensor were studied. The preparation of the sensor is simple and it can be used above 100 times. The sensor has been used for the determination of real samples containing hydrogen peroxide with satisfactory recovery.
出处
《化学传感器》
CAS
2003年第2期9-17,共9页
Chemical Sensors
