石墨烯/铁氰化钴复合膜修饰玻碳电极同时测定对苯二酚、邻苯二酚和间苯二酚  

Simultaneous Determination of Hydroquinone,Catechol and Resor-cinol Based on Graphene/Cobalt Hexacyanoferrate Modified Glassy Carbon Electrode

作　　者：黄克靖[1] 余晟[1] 王兰[1] 甘甜[1] 李梅[1] 

机构地区：[1]信阳师范学院化学化工学院,信阳464000

出　　处：《化学学报》2012年第6期735-740,共6页Acta Chimica Sinica

基　　金：河南省高校科技创新人才基金项目(No.2010HASTIT025);河南省科技创新杰出青年基金(No.104100510020)资助项目~~

摘　　要：采用滴涂法和电沉积法制备了石墨烯/铁氰化钴复合膜修饰玻碳电极.用扫描电镜对该纳米复合膜进行了表征.用循环伏安法研究了对苯二酚(HQ)、邻苯二酚(CT)和间苯二酚(RS)在修饰电极上的电化学行为.实验结果表明,相对于裸玻碳电极和石墨烯修饰电极,HQ,CT和RS在石墨烯/铁氰化钴修饰电极上的氧化峰电流显著提高.利用差分脉冲伏安法测定,HQ,CT和RS分别在1.0×10-6～1.5×10-4mol/L,1.0×10-6～2.0×10-4mol/L和3.5×10-6～2.5×10-4mol/L浓度范围内与氧化峰电流呈良好的线性关系,相关系数分别为0.991,0.993和0.992.信噪比为3时,HQ,CT和RS检出限分别为2.0×10-7,2.1×10-7和3.5×10-7mol/L.将该方法用于水样分析,回收率为95.6%～106.1%.Graphene was coated on glassy carbon electrode （GCE） and cobalt hexacyanoferrate was then electrodeposited on the modified electrode to fabricate electrochemical sensor. Scanning electron micro scope was used to characterize the nanocomposite film. The electrochemical behaviors of hydroquinone （HQ）, catechol （CT） and resorcinol （RS） on the modified electrode were investigated by cyclic voltammetry. The oxidation currents of CT, RS and HQ increased remarkably compared with those obtained at the bare GCE and graphene modified GCE. Differential pulse voltammetry was used for the simultaneous determina- tion of CT, RS and HQ in their ternary mixture. The concentration of HQ, CT and RS showed good linear relationships with the oxidation peak current in the range of 1.0X 10-6-1.5 X 10-4 mol/L, 1.0 X 10-6- 2.0 X 10-4 mol/L and 3.5 X 10-6-2.5 X 10-4 mol/L, with correlation coefficients of R=0.991, 0.993 and 0.992, respectively. The limits of detection for HQ, CT and RS were 2.0 X 10-7, 2.1X 10-7 and 3.5 X 10-7 mol/L （S/N= 3）, respectively. The developed method was used to determination of water samples with re coveries of 95.6%- 106.1%.

关 键 词：石墨烯 铁氰化钴 对苯二酚 邻苯二酚 间苯二酚 同时测定 

分 类 号：O657.1[理学—分析化学]