石墨烯修饰玻碳电极测定邻苯二酚

制备了用于测定邻苯二酚(CAT)的石墨烯修饰电极,并应用循环伏安法研究了CAT在该修饰电极上的电化学行为;用差分脉冲伏安法研究了测试底液的pH值对该修饰电极性能的影响,结果表明,此修饰电极在含不同浓度CAT的PBS溶液(pH=7.0)中测定,响应电流与CAT浓度在5.0×10-8～5.6×10-4mol/L范围内有良好的线性关系,相关系数r=0.9919,检出限为6.68×10-9mol/L(S/N=3)。与其它几种修饰电极相比,石墨烯修饰电极制备简单、响应时间快、操作简便,稳定性和重现性良好,有应用价值。

Determination of Catechol with Graphene Modified Glassy Carbon Electrode

A graphene modified glassy carbon electrode was fabricated for the determination of catechol.The electrochemical behaviors of the modified electrodes were investigated by cyclic voltammetry(CV).The influence of the solution pH on the modified electrode was studied by differential pulse voltammetry(DPV).It was found that there was a good linear relationship between the response current and the concentration of catechol over the range from 5.0×10-8 to 5.6×10-4 mol/L,with the correlation coefficient of 0.9919 and the detection limit of 6.68×10-9 mol/L(S/N=3).Compared with other modified electrode,the graphene modified glassy carbon electrode was convenient to prepare,and it exhibited a fast response time and long-term stability,and could be used in the determination of catechol.