Journal
ANALYTICA CHIMICA ACTA
Volume 698, Issue 1-2, Pages 61-68Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2011.04.054
Keywords
Imprinted electrochemical sensor; Multi-walled carbon nanotubes; Fe3O4 nanoparticles; Benzylpenicillin
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Funding
- Nature Science Foundation China [21005030]
- Hunan Provincial Education Department [10A099]
- Hunan Provincial Innovation Foundation for Postgraduate, China [CX2010B394]
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Herein, a novel imprinted sol-gel electrochemical sensor based on multi-walled carbon nanotubes (MWNTs) doped with chitosan film on a carbon electrode has been developed. Prior to doped, the MWNTs have been decorated with Fe3O4 nanoparticles which have been coated uniformly with SiO2 layer. The characterization of imprinted sensor has been carried out by X-ray diffraction and scanning electron microscopy. The performance of the proposed imprinted sensor has been investigated using cyclic voltammetry and differential pulse voltammetry. The imprinted sensor offers a fast response and sensitive benzylpenicillin quantification. The fabricated benzyl penicillin imprinted sensor exhibits a linear response from 5.0 x 10(-8) to 1.0 x 10(-3) mol L-1 with a detection limit of 1.5 x 10(-9) mol For samples analysis, perfect recoveries of the imprinted sensor for benzylpenicillin indicated that the imprinted sensor was able to detect benzylpenicillin in real samples successfully. (C) 2011 Elsevier B.V. All rights reserved.
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