Electrochemical behaviors of adrenaline at acetylene black electrode in the presence of sodium dodecyl sulfate

被引：46

作者：

Xie, PP

Chen, XX

Wang, F

Hu, CG

Hu, SS ^{[1
]}

机构：

[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China

[2] Chinese Acad Sci, State Key Lab Transducer Technol, Beijing 100080, Peoples R China

来源：

COLLOIDS AND SURFACES B-BIOINTERFACES | 2006年 / 48卷 / 01期

基金：

中国国家自然科学基金;

关键词：

adrenaline; sodium dodecyl sulfate (SDS); acetylene black electrode; electrochemistry;

D O I：

10.1016/j.colsurfb.2006.01.003

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

The electrochemical behaviors of adrenaline at the acetylene black electrode in the presence of sodium dodecyl sulfate (SDS) were investigated by cyclic voltammetry and electrochemical impedance spectroscopy (EIS). The results indicated that the electrochemical responses of adrenaline were apparently improved by SDS, due to the enhanced accumulation of protonated adrenaline via electrostatic interaction with negatively charged SDS at the hydrophobic electrode surface. This was verified by the influences of different kinds of surfactants on the electrochemical signals of adrenaline. The electrochemical parameters of the adrenaline oxidation were explored by chronocoulometry. Under optimal working conditions, the oxidation peak current at 0.57 V was proportional to adrenaline concentration in the range of 5.0 x 10(-8) to 7.0 x 10(-6) mol/L, with a low detection limit Of 1.0 X 10(-8) mol/L for 70s accumulation by differential pulse voltammetry (DPV). This method was applied to determine adrenaline in the hydrochloride injection sample. The results are satisfying compared with that by the standardized method of high performance liquid chromatography (HPLC). (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：17 / 23

页数：7

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