Electrochemical measurements of ascorbic acid based on graphite screen printed electrode modified with La3+/Co3O4 nanocubes transducer

被引：8
作者：
Aflatoonian, Mohammad Reza [1 ,2 ]
Tajik, Somayeh [1 ]
Aflatoonian, Behnaz [3 ]
Beitollahi, Hadi [4 ]
机构：
[1] Kerman Univ Med Sci, Res Ctr Trop & Infect Dis, Kerman, Iran
[2] Kerman Univ Med Sci, Leishmaniasis Res Ctr, Kerman, Iran
[3] Kerman Univ Med Sci, Neurosci Res Ctr, Kerman, Iran
[4] Grad Univ Adv Technol, Inst Sci & High Technol & Environm Sci, Environm Dept, Kerman, Iran
来源：
JOURNAL OF ELECTROCHEMICAL SCIENCE AND ENGINEERING | 2019年 / 9卷 / 03期
关键词：
Ascorbic acid; electrochemical characterization; La3+/Co3O4 nanocubes; graphite screen printed electrode; voltammetry; GLASSY-CARBON ELECTRODE; VOLTAMMETRIC DETERMINATION; PASTE ELECTRODE; SELECTIVE DETERMINATION; FLOW-INJECTION; PERFORMANCE; DOPAMINE; ACETAMINOPHEN; NANOCOMPOSITE; NANOPARTICLES;
D O I：
10.5599/jese.643
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Electrochemical characterization of ascorbic acid oxidation on a graphite screen printed electrode (SPE) modified with La3+/Co3O4 nanocubes is performed by applying cyclic voltammetry (CV), chronoamperometry (CHA), and differential pulse voltammetry (DPV) techniques. Synthesized La3+/Co3O4 nanocubes for SPE modification, La3+/Co3O4/SPE, enhance the ascorbic acid electrooxidation kinetics by reducing the anodic overpotential. Excellent La3+/Co3O4/SPE electrochemical properties provide sensitive ascorbic acid voltammetric determination with low detection limit, good stability and quick response towards electrooxidation of ascorbic acid as compared to bare SPE. Under optimized conditions, DPV current demonstrates a linear response for ascorbic acid over a concentration range of 1.0 to 900.0 mu M with a correlation coefficient of 0.9997, and detection limit (LOD) (S/N = 3) = 0.3 mu M. The proposed procedure offers a potential application for producing the sensor with good repeatability. Also, fast response of fabricated sensor can allow a real-time analysis of real samples.
引用
收藏
页码：197 / 206
页数：10
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