期刊
MICROCHIMICA ACTA
卷 185, 期 11, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-018-3071-4
关键词
Copper tungstate; polyaniline; Nanocomposite; Electrochemical sensor; Quercetin; Differential pulse voltammetry
A binary nanocomposite of type copper tungstate and polyaniline (CuWO4@ PANI) is described that was obtained by single step polymerization on the surface of a glassy carbon electrode (GCE). The resulting electrode is shown to be a viable tool for voltammetric sensing of quercetin (Qn) in blood, urine and certain food samples. The nanocomposite was characterized by UVvisible absorption spectroscopy, Fourier-transform infrared spectroscopy, thermogravimetric analysis, X-ray diffraction and highresolution transmission electron microscopy. Differential pulse voltammetry was applied to quantify Qn, typically at the relatively low working potential of 0.15 V (vs. Ag/ AgCl). The modified GCE has a wide analytical range (0.001-0.500 mu M) and a low detection limit (1.2 nM). The sensor is reproducible, selective and stable. This makes it suitable for determination of Qn in real samples without complicated sample pretreatment.
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