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作 者:田碧桃 李金来[1] 王维[1] 犹卫[1] 彭娟[1] 高作宁[1]
出 处:《化学研究与应用》2015年第6期796-802,共7页Chemical Research and Application
基 金:国家自然科学基金项目(21265014)资助;宁夏大学提升综合实力建设项目(8016-18)资助
摘 要:本文研究了芬苯达唑(Fenbendazole,FBZ)在石墨烯(RGO)与离子液体(N-丁基吡啶六氟磷酸盐)复合修饰碳糊电极上的电催化氧化及电化学动力学性质。同时用CC法(计时库仑法)、计时电流法(CA)测定FBZ在RGO-[Bupy]PF6/CPE上的电极反应动力学参数,并用方波伏安法(SWV)测定FBZ氧化峰电流(Ip)与其浓度c在4.0×10-8~1.0×10-5mol·L-1范围内呈良好线性关系,线性回归方程为Ip(μA)=1.471+5220.78c(10-3mol·L-1),R=0.9995,检测限(S/N=3)为1.4×10-9mol·L-1,在此基础上用SWV法对FBZ片剂中FBZ含量进行了电化学定量测定,RSD在0.2%~0.9%之间,回收率在99.0%~101.4%之间。Objective: Electrocatalytic oxidation and its electrochemical kinetics of fenbendazole(FBZ) were investigated by Cyclic voltammetry(CV) method at carbon paste electrode(CPE) which modified by graphene(RGO) and [Bupy]PF6.The experiment results indicated that FBZ electrochemical behaviors exhibits an irreversible electrochemical oxidation progress at RGO-[Bupy]PF6/CPE,The electrochemical kinetic parameters were determined by chronocoulometry(CC) and chronoamperometry(CA) at RGO-[Bupy]PF6/ CPE.The oxidation peak current of FBZ versus its concentration had a good linear relationship in the concentration range of 4.0 × 10-8~ 1.0 × 10-5mol·L-1and the detection limit(S/N = 3) was 1.4 × 10-9mol·L-1by square wave voltammetric(SWV) method.The equation of linear regression was Ip(μA) = 1.471+5220.78c(10-3mol·L-1),R = 0.9995,Also the proposed method have been applied in electrochemical quantitative determination of FBZ content in commercial tablet samples,with their relative standard deviations of 0.2% ~ 0.9%and recoveries of 99.0% ~ 101.4%.
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