Electrochemical oxidation and determination of dopamine in the presence of uric and ascorbic acids using a carbon nano-onion and poly(diallyldimethylammonium chloride) composite
Electrochemical oxidation and determination of dopamine in the presence of uric and ascorbic acids using a carbon nano-onion and poly(diallyldimethylammonium chloride) composite
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DOI：
10.1016/j.electacta.2012.03.177
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发表时间：
2012-06-30
影响因子：
6.6
通讯作者：
Echegoyen, Luis
中科院分区：
文献类型：
--
作者：
Breczko, Joanna;Plonska-Brzezinska, Marta E.;Echegoyen, Luis
首次报道了纳米碳洋葱（CNO）与聚二甲基二烯丙基氯化铵（PDDA）的复合物用于多巴胺（DA）的检测。在磷酸盐缓冲盐水（PBS）溶液中的复合材料的电化学性能进行了检查，并验证其检测多巴胺的能力。结果表明，该方法具有良好的选择性和灵敏度。hocs/PDDA复合物允许测定5 x 10（-5）和4 x 10（-3）mol L-1范围内的多巴胺。在抗坏血酸（AA）和尿酸（UA）的存在下，同时测定溶液中的所有三种分子。该修饰电极还可用于测定多巴胺的浓度。采用循环伏安法、微分脉冲伏安法和方波伏安法对结果进行了研究。(C)2012爱思唯尔有限公司保留所有权利。
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.