Electrochemical oxidation and determination of dopamine in the presence of uric and ascorbic acids using a carbon nano-onion and poly(diallyldimethylammonium chloride) composite

被引：90

作者：

Breczko, Joanna ^{[1
]}

Plonska-Brzezinska, Marta E. ^{[1
]}

Echegoyen, Luis ^{[2
]}

机构：

[1] Univ Bialystok, Inst Chem, PL-15399 Bialystok, Poland

[2] Univ Texas El Paso, Dept Chem, El Paso, TX 79968 USA

来源：

ELECTROCHIMICA ACTA | 2012年 / 72卷

关键词：

Carbon nano-onion; Polyelectrolyte; Poly(diallyldimethylammonium chloride); Composite; Dopamine; SELECTIVE DETERMINATION; ELECTROCATALYTIC OXIDATION; NANOTUBES; NANOPARTICLES; IMMOBILIZATION; FILM; POLYMERIZATION; DISPERSION; NANOFIBERS; ELECTRODE;

D O I：

10.1016/j.electacta.2012.03.177

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

This is the first report of dopamine (DA) detection using a carbon nano-onion (CNO) and poly(diallyldimethylammonium chloride)(PDDA) composite.The film was deposited by a coating method on a glassy carbon electrode surface, applying a drop of solution containing the suspended CNOs and PDDA. The electrochemical properties of the composite in phosphate buffered saline (PBS) solution were examined and their ability to detect dopamine was verified. The results showed good selectivity and sensitivity for dopamine analysis. The CNOs/PDDA composite allows the determination of dopamine in a range between 5 x 10(-5) and 4 x 10(-3) mol L-1. in the presence of ascorbic (AA) and uric (UA) acids, and simultaneous assays all three molecules in solution. The modified electrode can also be used to determine the concentration of dopamine. Results were investigated by cyclic voltammetry, differential pulse voltammetry and square wave voltammetry. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：61 / 67

页数：7

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