欢迎访问《电化学(中英文)》期刊官方网站,今天是

电化学(中英文) ›› 2007, Vol. 13 ›› Issue (2): 127-131.  doi: 10.61558/2993-074X.1793

• 研究论文 • 上一篇    下一篇

纳米金双巯基修饰金电极差分脉冲伏安法测定多巴胺和抗坏血酸

汪海燕;柳鹏;王晔;金葆康;   

  1. 安徽大学化学化工学院,安徽大学化学化工学院,安徽大学化学化工学院,安徽大学化学化工学院 安徽合肥230039巢湖学院化学系,安徽巢湖230038,安徽合肥230039,安徽合肥230039,安徽合肥230039
  • 收稿日期:2007-05-28 修回日期:2007-05-28 出版日期:2007-05-28 发布日期:2007-05-28

Determination of Ddopamine and Ascorbate on Gold Nanoparticle and 4,4-bis (methanethiol) biphenyl (MTP) Self-assembled Monolayer Modified Gold Electrode

WANG Hai-yan1,2,LIU Peng1,WANG Ye1,JIN Bao-kang1   

  1. (1.School of Chemistry and Chemical Engineering,Anhui University,Hefei 230039,Anhui,China2.Department of Chemistry,chaohu College,Chaohu 230038,Anhui,China
  • Received:2007-05-28 Revised:2007-05-28 Published:2007-05-28 Online:2007-05-28

摘要: 在裸金电极上自组装4,4-二甲基联苯硫醇(MTP)膜(MTP/AuSAMs),再电还原氯金酸溶液修饰纳米金,得纳米金双巯基修饰金电极(NG/MTP/Au).研究了多巴胺(DA)和抗坏血酸(AA)在NG/MTP/Au上的电化学行为,发现该修饰电极对DA、AA的氧化具有良好的电催化作用,多巴胺(DA)和抗坏血酸(AA)的氧化峰电位差达到155mV,可以实现对此二组分混合溶液的选择性测定.差分脉冲法测得的峰电流与DA、AA浓度分别在5.0×10-7~1×10-4mol.L-1和3.5×10-6~1.0×10-3mol.L-1范围内呈线性关系,检测限(3σ)分别为1.5×10-7mol.L-1和1.2×10-6mol.L-1,相关系数0.998.

关键词: 多巴胺, 抗坏血酸, 4,4-二甲基联苯硫醇, 纳米金, 差分脉冲法

Abstract: A new approach to construct an ampermetric biosensor was described.The 4,4-bis(methanethiol)biphenyl(MTP)is adsorbed on to a bare gold electrode to make self-assembled monolayers(MTP/Au SAMs).Then electrodeposited 2mg/mL HAuCl4 at-200 mV,NG/MTP/Au electrode was prepared.When a differential pulse voltammetric(DPV)technique was used,the peak separation between DA and AA is 155 mV.Hence,the selective determination of dopamine(DA)and ascorbate(AA)in the binary mixture system can be performed.Under the chosen conditions,the peak currents are correspondent linearly to the concentrations of DA and AA in the range of 5.0×10-7~1×10-4 mol·L-1 and 3.5×10-6~1.0×10-3mol·L-1,respectively.The correlation coefficients were 0.998.The detection limit were 1.5×10-7 mol·L-1 and 1.2×10-6 mol·L-1for DA and AA.

Key words: dopamine, ascorbate, gold nanpoarticle, MTP, DPV

中图分类号: