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Issue 18, 2013
From the journal:

Analytical Methods

Determination of l-tryptophane using a sensor platform based on LaCoO3 poriferous nanofibers by electrospinning

Zhen Zhang,ac   Shuqing Gu,ab   Yaping Ding,*ab   Jindi Jinb  and  Fenfen Zhanga  

* Corresponding authors

a School of Materials Science and Engineering, Iron and Steel Metallurgy Key Laboratory, Shanghai University, Shanghai 200444, PR China

b Department of Chemistry, Shanghai University, Shanghai 200444, PR China
E-mail: wdingyp@sina.com
Fax: +86-21-66132797
Tel: +86-021-66134734

c School of Chemistry & Chemical Engineering, Linyi University, Linyi 276005, PR China

Abstract

We report a sensor platform for the determination of L-tryptophane. It is based on a carbon paste electrode that was modified with LaCoO3 poriferous nanofibers that were synthesized by electrospinning and subsequent thermal treatment. The structures and morphologies of LaCoO3 poriferous nanofibers were characterized by X-ray diffraction spectrum and scanning electron microscopy. The electrochemical performance of the sensor was evaluated by cyclic voltammetry and amperometry, and the results demonstrated that it exhibits strong electrocatalytical activity towards the oxidation of L-tryptophan in 0.1 mol L−1 phosphate buffer solution (pH 3.0). The linear range of L-tyrosine was 5.0 × 10−8 to 5.0 × 10−6 mol L−1 with a low detection limit down to 1.0 × 10−8 mol L−1. Moreover, the modified electrode exhibited high selectivity, long-term stability and fast current response, demonstrating its feasibility for the analytical purpose.

Graphical abstract: Determination of l-tryptophane using a sensor platform based on LaCoO3 poriferous nanofibers by electrospinning

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Article information

DOI
https://doi.org/10.1039/C3AY40773J
Article type
Paper
Submitted
08 May 2013
Accepted
28 Jun 2013
First published
02 Jul 2013

Anal. Methods, 2013,5, 4859-4864

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Determination of L-tryptophane using a sensor platform based on LaCoO3 poriferous nanofibers by electrospinning

Z. Zhang, S. Gu, Y. Ding, J. Jin and F. Zhang, Anal. Methods, 2013, 5, 4859 DOI: 10.1039/C3AY40773J

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