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[1]宋宏图,舒好,汪召豪,等.3巯基丙酸自组装金电极的制备及其对尿酸的电化学[J].武汉工程大学学报,2011,(12):20-26.
　SONG Hong tu,SHU Hao,WANG Zhao hao,et al.Preparation of 3mercaptoaceticpropionic acid selfassembled goldelectrode and its electrochemical investigations for UA[J].Journal of Wuhan Institute of Technology,2011,(12):20-26.
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3巯基丙酸自组装金电极的制备及其对尿酸的电化学(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
期数:
2011年12期
页码:
20-26
栏目:
化学与化学工程
出版日期:
2011-12-30

文章信息/Info

Title:
Preparation of 3mercaptoaceticpropionic acid selfassembled gold
electrode and its electrochemical investigations for UA
文章编号:
16742869(2011)12002007
作者:
宋宏图; 舒好; 汪召豪; 万其进*
武汉工程大学绿色化工过程教育部重点实验室，
湖北省新型反应器与绿色化学工艺重点实验室，湖北 武汉 430074
Author(s):
SONG Hongtu; SHU Hao; WANG Zhaohao; WAN Qijin
Key Laboratory for Green Chemical Process of Ministry of Education,
Hubei Key Lab of Novel Reactor & Green Chemical Technology,Wuhan Institute of Technology,Wuhan 430074,China
关键词:
3巯基丙酸; 自组装膜; 尿酸
Keywords:
MPA; selfassembled monolayer; uric acid
分类号:
O657.1
DOI:
-
文献标志码:
AAdoi:10.3969/j.issn.16742869.2011.12.005
摘要:
采取自组装的方法制备3巯基丙酸（3mercaptoacetic propionic acid，MPA）自组装膜修饰金电极，进而采用循环伏安、交流阻抗等电化学方法对该电极进行表征，计算电极有效表面积为1.97×10-2 cm2.研究了尿酸（uric acid,UA）在该修饰电极上的电化学行为，结果表明，MPA/SAM/Au电极具有良好的稳定性和电化学活性，在pH=6.0的磷酸氢二钠柠檬酸（Na2HPO4C6H8O7）缓冲溶液中，相比裸金电极,MPA/SAM/Au电极对UA响应的峰电流较大.其氧化峰电流与尿酸的浓度在1.6×10-4～1×10-6 mol/L浓度范围内呈良好的线性关系，线性回归方程为ip/(μA)=0.738 9+0.040 46 c0/(μmol/L)，相关系数R=0.998 6，检测限为5×10-7 mol/L.
Abstract:
The 3mercaptoaceticpropionic acid (MPA) selfassembled monolayers was prepared by immersing the bare gold electrode into the MPA solution for 24 h.The resulting substrates were characterized by Cyclic Voltammetry and EIS in ［Fe(CN)6］3/4 solution and showed the MPA was attached on the gold electrode,and the effective surface area of the modified electrode was 1.97×10-2 cm2.Also,the result concluded that,in the pH =6.0 disodium phosphatecitric acid (Na2HPO4C6H8O7)buffer solution,the response of UA determined by the MPA/Au electrode was that the peak current was that higher and the peak potential shifted negatively,compared to the bare electrode and that the whole electrochemical process was controlled by diffusion.The concentration linearity was ip/(μA)=0.738 9+0.0404 6c0/(μmol/L),R=0.998 6,in the solution range of 1.6×10-4 mol/L—1×10-6 mol/L and determined the sample UA.The proposed method was convenient and feasible with satisfactory result.

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