Development of an Electrochemical Sensor to Detect Dopamine and Ascorbic Acid Based on Neodymium (III) Oxide and Chitosan

被引：18
作者：
Nagles, Edgar [1 ]
Calderon, Jorge A. [2 ]
Garcia-Beltran, Olimpo [1 ]
机构：
[1] Univ Ibague, Fac Ciencias Nat & Matemat, Carrera 22 Calle 67, Ibague 730001, Colombia
[2] Univ Antioquia UdeA, Ctr Invest Innovac & Desarrollo Mat CIDEMAT, Calle 70 52-21, Medellin, Colombia
来源：
ELECTROANALYSIS | 2017年 / 29卷 / 04期
关键词：
Ascorbic acid; Chitosan; Dopamine; Modified electrodes; Neodymium (III) Oxide; GLASSY-CARBON ELECTRODE; URIC-ACID; PASTE ELECTRODE; SELECTIVE DETERMINATION; FILM ELECTRODE; NANOTUBES; ACETAMINOPHEN;
D O I：
10.1002/elan.201600729
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Neodymium (III) oxide (Nd-Ox) was dispersed in chitosan dissolution and deposited on a glassy carbon electrode (chitosan-Nd-Ox/GCE). The surface properties of the chitosan-Nd-Ox/GCE were evaluated with FeCN6-3 solution using cyclic voltammetry and electrochemical impedance spectroscopy. The modified electrode was used in the determination of individual dopamine (DP) and ascorbic acid (AA) with square wave adsorptive voltammetry. Under optimal parameters (pH4.0; accumulation time; t(ACC) 60s and accumulation potential; E-ACC 0.10V) for DP and (pH3,0; t(ACC) 60s and; E-ACC -0.20V) for AA, anodic peak currents were proportional to the concentration of DP and AA between 0.90 and 17.0 molL(-1), with detection limit of 0.079 molL(-1) for DP and 0.12 molL(-1) for AA. The sensor was used in the determination of DP and AA in human urine samples and vitamin C tablets with consistent results. The new sensor is easy to develop. In addition, the sensitivity in particular for AA was improved compared with previous work.
引用
收藏
页码：1081 / 1087
页数：7
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