Electrocatalytic Determination of L-cysteine in the Presence of Tryptophan Using Carbon Paste Electrode Modified with MgO Nanoparticles and Acetylferrocene

被引：12
作者：
Gupta, Vinod Kumar [1 ]
Shamsadin-Azad, Zahra [2 ]
Cheraghi, Somaye [2 ,3 ]
Agarwai, Shilpi [1 ]
Taher, Mohammad A. [2 ]
Karimi, Fatemeh
机构：
[1] Univ Johannesburg, Dept Appl Chem, Johannesburg, South Africa
[2] Islamic Azad Univ, Mashhad Branch, Dept Chem, Mashhad, Iran
[3] Grad Univ Adv Technol, Dept Chem, Kerman, Iran
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2018年 / 13卷 / 05期
关键词：
Acetylferrocene; MgO nanoparticle; L-cysteine; Tryptophan; Electrocatalysis; 1-BUTYL-3-METHYLIMIDAZOLIUM HEXAFLUORO PHOSPHATE; NANOSTRUCTURE VOLTAMMETRIC SENSOR; TEMPERATURE IONIC LIQUID; ASCORBIC-ACID; FOLIC-ACID; ELECTROCHEMICAL SENSOR; URIC-ACID; SELECTIVE DETERMINATION; POTENTIOMETRIC SENSOR; AMPLIFIED SENSOR;
D O I：
10.20964/2018.05.53
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The electrical conductivity effect of MgO nanoparticle (MgO-NPs) and electro-catalytic effect of acetylferrocene (AF) was studied for modification of carbon paste electrode (CPE) as a highly sensitive electrochemical sensor for electro-catalytic determination of L-cysteine in the aqueous solution. The AF/MgO-NPs/CPE showed good electro-catalytic activity for analysis of L-cysteine in the concentration range 0.1-700.0 mu M with limit of detection 30.0 nM using differential pulse voltammetric method (DPV). In addition, the AF/MgO-NPs/CPE showed two separated oxidation signals with Delta E similar to 170 mV in the solution containing L-cysteine and tryptophan that is sufficient for simulations determination of these amino acids with same oxidation potential at a surface of unmodified electrode.
引用
收藏
页码：4309 / 4318
页数：10
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