Non-enzymatic sensing of uric acid using a carbon nanotube ionic-liquid paste electrode modified with poly(β-cyclodextrin)

被引：0
作者：
Yonghong Li
Xiurong Zhai
Haibo Wang
Xinsheng Liu
Le Guo
Xiaoling Ji
Ling Wang
Hongyan Qiu
Xiaoying Liu
机构：
[1] Ningxia Medical University,School of Public Health
[2] Jining University,Department of Chemistry and Chemical Engineering
[3] Xinyang Normal University,College of Chemistry and Chemical Engineering
[4] Ningxia Medical University,Higher Vocational Technical School
[5] Ningxia Medical University,School of Laboratory Medicine
[6] Hunan Agriculture University,College of Science
来源：
Microchimica Acta | 2015年 / 182卷
关键词：
β-cyclodextrin; Carbon nanotube ionic liquid paste electrode; Electropolymerization; Uric acid; Linear sweep voltammetry;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We describe a nonenzymatic electrochemical sensor for uric acid. It is based on a carbon nanotube ionic-liquid paste electrode modified with poly(β-cyclodextrin) that was prepared in-situ by electropolymerization. The functionalized multi-walled carbon nanotubes and the surface morphology of the modified electrodes were characterized by transmission electronic microscopy and scanning electron microscopy. The electrochemical response of uric acid was studied by cyclic voltammetry and linear sweep voltammetry. The effects of scan rate, pH value, electropolymerization cycles and accumulation time were also studied. Under optimized experimental conditions and at a working voltage of 500 mV vs. Ag/AgCl (3 M KCl), response to uric acid is linear in the 0.6 to 400 μΜ and in the 0.4 to 1 mΜ concentration ranges, and the detection limit is 0.3 μΜ (at an S/N of 3). The electrode was successfully applied to the detection of uric acid in (spiked) human urine samples.
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页码：1877 / 1884
页数：7
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