Electrochemical Oxidation of Dopamine at Polyethylene glycol Modified Carbon Paste Electrode: A Cyclic Voltammetric Study

被引：0
|
作者：
Chandrashekar, B. N. [1 ]
Swamy, B. E. Kumara [1 ]
Pandurangachar, M. [2 ]
Shankar, S. Sharath [1 ]
Gilbert, Ongera [1 ]
Manjunatha, J. G. [1 ]
Sherigara, B. S. [1 ]
机构：
[1] Kuvempu Univ, Dept PG Studies & Res Ind Chem, Shimoga 577451, Karnataka, India
[2] SSMRV Degree Coll, Dept Chem, Bangalore 41, Karnataka, India
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2010年 / 5卷 / 04期
关键词：
Dopamine; Potassium ferricyanide; PEG/CPE; Cyclic voltammetry and PBS; ASCORBIC-ACID; BROMIDE;
D O I：
暂无
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Polyethylene glycol (PEG) modified carbon paste electrode (CPE) was fabricated for the detection of dopamine and potassium ferricyanide. It showed an excellent sensitivity towards the oxidation of dopamine (DA) in 0.1M phosphate buffer (PBS) at 6.6 pH and potassium ferricyanide in 1 M KCl solution. Effect of scan rate, concentration and pH were studied by the cyclic voltammetric technique. The concentration effect of modifier in the carbon paste electrode also reveals that the change in the electrode interface which would leads to the surface modification of the electrode, enhanced the interaction between the electrode and the cationic charged dopamine. The detection limit of dopamine is 1 x 10(-5) M and the potassium ferricyanide is 1 x 10(-4) M was observed for the PEG/CPE.
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页码：578 / 592
页数：15
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