期刊
MICROCHIMICA ACTA
卷 185, 期 1, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-017-2613-5
关键词
Hybrid nanomaterial; Polymerization; Magnetite; XRD; FTIR; VSM; Nafion; Disposable sensor; FE-SEM; EIS; DPV
资金
- National Natural Science Foundation of China [51672104, 51472107]
- Natural Science Foundation of Hunan Province [2016JJ4071]
- Foundation of Hunan Educational Committee [16B205, 17C1148]
- Construct Program of the Key Discipline in Huaihua University
- Hunan Province Food AMP
- Drug Testing and Quality Control School-Enterprise Cooperation Innovation and Entrepreneurship Education Base
An electrochemical quercetin (QR) sensor is described that is based on the use of magnetic reduced graphene oxide (MrGO) incorporated into a molecularly imprinted polymer (MIP) on the surface of a screen-printed electrode (SPE). The MrGO consists of reduced graphene oxide (rGO), magnetite (Fe3O4) and silver nanoparticles (Ag). The analyte (QR) is electrostatically adsorbed on the surface of the MrGO. Finally, the MIP was deposited via in-situ polymerization. The composite was characterized by Xray diffraction, Fourier transform infrared spectroscopy and Vibrating sample magnetometry. The morphologies and electrochemical properties of different electrodes were characterized by Field emission scanning electron microscopy, Electrochemical impedance spectroscopy and differential pulse voltammetry. Under optimal conditions, the modified electrode has a linear response in the 20 nM to 250 mu M QR concentration range. The limit of detection is 13 nM (at an S/N ratio of 3). The electrode is selective, stable, regenerable and reliable. It was applied to the determination of QR in spiked pharmaceutical samples and gave satisfactory results.
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