A non-enzymatic voltammetric xanthine sensor based on the use of platinum nanoparticles loaded with a metal-organic framework of type MIL-101(Cr). Application to simultaneous detection of dopamine, uric acid, xanthine and hypoxanthine

被引：0
作者：
Li Zhang
Shaobin Li
Jianjiao Xin
Huiyuan Ma
Haijun Pang
Lichao Tan
Xinming Wang
机构：
[1] Harbin University of Science and Technology,School of Materials Science and Engineering, College of Chemical and Environmental Engineering
[2] Qiqihar University,College of Materials Science and Engineering, Heilongjiang Provincial Key Laboratory of Polymeric Composite Materials
来源：
Microchimica Acta | 2019年 / 186卷
关键词：
Metal-organic frameworks; Metal nanoparticles; Electrochemistry; Non-enzymatic sensor; Glassy carbon electrode; Cyclic voltammetry; Differential pulse voltammetry; Electrochemical impedance spectroscopy; Human serum; Standard addition method;
D O I：
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摘要：
A Cr-based metal-organic framework MIL-101(Cr) was used to load platinum nanoparticles (PtNPs) that were placed on a glassy carbon electrode (GCE). The modified GCE was used as a non-enzymatic xanthine sensor. Compared to bare GCE, it requires a strongly decreased working potential and an increased signal current for xanthine oxidation. This is due to the crystalline ordered structure and large specific surface of the MIL-101(Cr), and to the high conductivity of the Pt NPs. Differential pulse voltammetry (DPV) shows the sensor to have a wide linear range (0.5 – 162 μM), a low detection limit (0.42 μM), and high selectivity. It was applied to the simultaneous determination of dopamine, uric acid, xanthine and hypoxanthine at working potentials of 0.13, 0.28, 0.68 and 1.05 V, respectively (vs. Ag/AgCl) and to quantify xanthine in spiked serum samples.
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