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Sensors 2013, 13(5), 5493-5506; doi:10.3390/s130505493

A Molecularly Imprinted Polymer with Incorporated Graphene Oxide for Electrochemical Determination of Quercetin

College of Chemistry, Nankai University, 94 Weijin Road, Tianjin 300071, China
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Received: 13 March 2013 / Revised: 11 April 2013 / Accepted: 12 April 2013 / Published: 25 April 2013
(This article belongs to the Special Issue Novel Tools in Electrochemical Sensing)
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Abstract

The molecularly imprinted polymer based on polypyrrole film with incorporated graphene oxide was fabricated and used for electrochemical determination of quercetin. The electrochemical behavior of quercetin on the modified electrode was studied in detail using differential pulse voltammetry. The oxidation peak current of quercetin in B-R buffer solution (pH = 3.5) at the modified electrode was regressed with the concentration in the range from 6.0 × 10−7 to 1.5 × 10−5 mol/L (r2 = 0.997) with a detection limit of 4.8 × 10−8 mol/L (S/N = 3). This electrode showed good stability and reproducibility. In the above mentioned range, rutin or morin which has similar structures and at the same concentration as quercetin did not interfere with the determination of quercetin. The applicability of the method for complex matrix analysis was also evaluated.
Keywords: molecularly imprinted polymer; graphene oxide; quercetin; modified electrode molecularly imprinted polymer; graphene oxide; quercetin; modified electrode
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Sun, S.; Zhang, M.; Li, Y.; He, X. A Molecularly Imprinted Polymer with Incorporated Graphene Oxide for Electrochemical Determination of Quercetin. Sensors 2013, 13, 5493-5506.

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