Electrochemical determination of malachite green at graphene quantum dots–gold nanoparticles multilayers–modified glassy carbon electrode

被引：6
作者：
Juying Hou
Feng Bei
Minglin Wang
Shiyun Ai
机构：
[1] Shandong Agricultural University,College of Food Science and Engineering
[2] Shandong Agricultural University,College of Chemistry and Material Science
[3] Taian Entry–Exit Inspection and Quarantine Bureau,undefined
来源：
Journal of Applied Electrochemistry | 2013年 / 43卷
关键词：
Malachite green; Graphene quantum dots; Gold nanoparticles; Modified electrode; Electro-oxidation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A graphene quantum dots–gold nanoparticles–modified glassy carbon electrode was used to investigate the electrochemical behaviors of malachite green (MG). Cyclic voltammetry curves of MG at the modified electrode exhibited a pair of quasi-reversible adsorption-controlled redox peaks at 0.502 V (Epa) and 0.446 V (Epc) in a 0.05 mol L−1 H2SO4 solution. Under the optimal conditions, by using differential pulse voltammetry as the detection method, a linear relationship was obtained between the oxidation peak current and the MG concentration in the range of 4.0 × 10−7 to 1.0 × 10−5 mol L−1 with the detection limit as 1.0 × 10−7 mol L−1 (signal-to-noise ratio of 3). The modified electrode was applied in the determination of MG in fish samples, and the results were satisfactory with recoveries from 96.25 to 98.00 %. Furthermore, the modified electrode showed very good reproducibility and stability.
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页码：689 / 696
页数：7
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