| 硫脲在10-甲基吩噻嗪修饰碳糊电极上的电催化氧化及电分析方法研究 |
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| 引用本文： | 王春梅,高作宁.硫脲在10-甲基吩噻嗪修饰碳糊电极上的电催化氧化及电分析方法研究[J].分析试验室,2009,28(7). |
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| 作者姓名： | 王春梅 高作宁 |
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| 作者单位： | 宁夏大学能源化工重点实验室,化学化工学院,银川,750021 |
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| 基金项目： | 宁夏高等学校科学研究项目 |
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| 摘 要： | 研究了硫脲(Thiourea,Tu)在10-甲基吩噻嗪修饰碳糊电极(MPT/CPE)上的电催化氧化行为.结果表明,Tu在裸碳糊电极(CPE)上的直接电化学氧化过程十分迟缓,MPT/CPE对Tu的电化学氧化具有良好的催化作用.用计时电流法(CA)测定了Tu在MPT/CPE上的电极过程动力学参数,测得电荷传递系数α=0.61,电催化氧化反应的速率常数k=(1.96±0.10)×104(mol/L)-1·s-1.用方渡伏安法(SWV)测得催化氧化峰电流与Tu浓度在1.0×10-6～8.0×10-3mol/L范围内呈良好的线性关系,线性回归方程为,Ips(μA)=10.836c(10-3mol/L)+5.326,R=0.9984,检出限为2.2×10-7mol/L(S/N=3).方法可用于Tu的电化学法测定.
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| 关 键 词： | 硫脲 10-甲基吩噻嗪 碳糊修饰电极 电催化氧化 电化学动力学 |
Electrocatalytic oxidation of thiourea at a 10-methylphenothiazine modified carbon paste electrode and its practical analytical application |
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| WANG Chun-mei,GAO Zuo-ning.Electrocatalytic oxidation of thiourea at a 10-methylphenothiazine modified carbon paste electrode and its practical analytical application[J].Chinese Journal of Analysis Laboratory,2009,28(7). |
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| Authors: | WANG Chun-mei GAO Zuo-ning |
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| Institution: | Key Lab of Energy Sources and Chemical Engineering;College of Chemistry and Chemical Engineering;Ningxia University;Yinchuan 750021 |
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| Abstract: | A 10-methylphenothiazine modified carbon paste electrode(MPT/CPE) was used to study electrochemical oxidation of thiourea(Tu).It was found that thiourea itself showed a very poor electrochemical response at a carbon paste electrode(CPE),and the electrochemical behaviors of Tu could be greatly improved by using the MPT/CPE,which enabled a sensitive electrochemical determination of the substrate thiourea.The kinetic parameters of the electrode reaction were evaluated by using cyclic voltammetry(CV) and chrono... |
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| Keywords: | Thiourea 10-methylphenothiazine Modified carbon paste electrode Electrocatalytic oxidation Electrochemical kinetics |
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