硫化物在乙酰二茂铁修饰碳糊电极上的电化学行为及电分析  

Electrochemical Behaviors of Sulfide at Acetylferrocene Modified Carbon Paste Electrode and Its Electrochemical Determination

作　　者：吴锐[1,2] 段成茜[1,3] 高作宁[1] 

机构地区：[1]宁夏大学能源化工重点实验室,化学化工学院,宁夏银川750021 [2]银川科技职业学院,宁夏银川750100 [3]宁夏医科大学高等卫生职业技术学院,宁夏银川750004

出　　处：《分析科学学报》2012年第3期385-388,共4页Journal of Analytical Science

基　　金：银川科技职业学院科技开发与应用研究基金

摘　　要：研究了S2-在乙酰二茂铁(AFc)修饰碳糊电极(AFc/CPE)上的电催化氧化行为及其电化学分析方法。实验结果表明,AFc/CPE对S2-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S2-在AFc/CPE上的电催化氧化反应速率常数k为(2.60±0.05)×105 L.mol-1.s-1。用方波伏安法(SWV)测得催化氧化峰电流与S2-的浓度在5.0×10-5～1.0×10-3 mol.L-1范围内呈良好线性关系,检出限(S/N=3)为1.3×10-7 mol.L-1,同时运用SWV法对造纸废水水样中S2-的含量进行了电化学定量测定。Electrocatalytic oxidation behaviors and electrochemical determination of sulfidion at acetylferrocene（AFc）modified carbon paste electrode（AFc/CPE）were investigated.The experimental results showed that the AFc/CPE showed an excellent electrocatalytic activity toward sulfidion.The reaction rate constant for catalytic oxidation was obtained as（2.60±0.05）×105（mol.L-1）-1.s-1 by chronoamperometry（CA）.The catalytic oxidation peak current of sulfidion and its concentration had a good linear relationship in the concentration range of 5.0×10-5～1.0×10-3 mol.L-1 with the correlation coefficient of 0.9985,and the detection limit of 1.3×10-7 mol.L-1（S/N=3）was obtained by square wave voltammetry（SWV）.It has been applied to determine sulfidion content in waste water samples from paper-manufacture with satisfactory results.

关 键 词：硫化物 乙酰二茂铁 碳糊修饰电极 电催化氧化 电分析方法 

分 类 号：O657.1[理学—分析化学]