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An Electrochemical Sensor for L-Tryptophan Using a Molecularly Imprinted Polymer Film Produced by Copolymerization of o-Phenylenediamine and Hydroquinone.

Authors :
Zhao, Fan
Li, Xiao
Xu, Wen
Zhang, Weiying
Ying, Xiaoguang
Source :
Analytical Letters. Jul2014, Vol. 47 Issue 11, p1712-1725. 14p.
Publication Year :
2014

Abstract

An electrochemical sensor for L-tryptophan based on a molecularly imprinted polymer was developed. The sensing film was prepared by the co-electropolymerization of o-phenylenediamine and hydroquinone on a gold electrode in the presence of L-tryptophan as the template. The performance of the L-tryptophan sensor was characterized by cyclic voltammetry, differential pulse voltammetry, and alternating current impedance. Under the optimal experimental conditions, the relative current change was linear to the concentration of L-tryptophan in the range of 1.0 × 10−8to 1.0 × 10−6 mol/L and a detection limit of 0.50 × 10−8 mol/L was obtained. The sensor showed high sensitivity and selectivity for L-tryptophan. The imprinting factor was 3.58 and selectivity factors of L-tryptophan compared to analogs were larger than 2. The sensor also demonstrated good resistance to acidic, basic, and organic environments. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00032719
Volume :
47
Issue :
11
Database :
Academic Search Index
Journal :
Analytical Letters
Publication Type :
Academic Journal
Accession number :
96796495
Full Text :
https://doi.org/10.1080/00032719.2014.880172