Ratiometric electrochemical sensor for bisphenol A detection using a glassy carbon electrode modified with a poly(toluidine blue)/gold nanoparticle composite

Zhiyuan Sun; Qin Xiao; Jingjing Tang; Qianfen Zhuang; Yong Wang

doi:10.1039/D1AY01366A

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Ratiometric electrochemical sensor for bisphenol A detection using a glassy carbon electrode modified with a poly(toluidine blue)/gold nanoparticle composite

Zhiyuan Sun,^a Qin Xiao,^a Jingjing Tang,^a Qianfen Zhuang^a and Yong Wang

*^abc

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* Corresponding authors

^a College of Chemistry, Nanchang University, Nanchang 330031, China
E-mail: wangyong@ncu.edu.cn
Fax: +86 791 83969500
Tel: +86 791 83969500

^b State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China

^c Jiangxi Province Key Laboratory of Modern Analytical Science, Nanchang University, Nanchang 330031, China

Abstract

A ratiometric electrochemical sensor for bisphenol A (BPA) detection is developed using a glassy carbon electrode modified with a poly(toluidine blue)/gold nanoparticle composite (PTB/AuNP/GCE). The ratiometric signal, namely, the oxidation peak current ratio of BPA to PTB, increases linearly with BPA concentration in the 0.2–5.0 μM range, with a detection limit of 0.15 μM. The electrochemical mechanism of BPA is studied at the PTB/AuNP/GCE, and the results show that BPA undergoes an electrooxidation process of two electrons and two protons at the PTB/AuNP/GCE. The proposed sensor has high sensitivity, high stability and good selectivity. The application of BPA in water samples is successfully verified using the proposed ratiometric electrochemical sensor.

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Article information

DOI: https://doi.org/10.1039/D1AY01366A
Article type: Paper
Submitted: 10 Aug 2021
Accepted: 04 Oct 2021
First published: 05 Oct 2021

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Anal. Methods, 2021,13, 5085-5092

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Ratiometric electrochemical sensor for bisphenol A detection using a glassy carbon electrode modified with a poly(toluidine blue)/gold nanoparticle composite

Z. Sun, Q. Xiao, J. Tang, Q. Zhuang and Y. Wang, Anal. Methods, 2021, 13, 5085 DOI: 10.1039/D1AY01366A

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Analytical Methods

Ratiometric electrochemical sensor for bisphenol A detection using a glassy carbon electrode modified with a poly(toluidine blue)/gold nanoparticle composite

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Ratiometric electrochemical sensor for bisphenol A detection using a glassy carbon electrode modified with a poly(toluidine blue)/gold nanoparticle composite

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