A new ratiometric electrochemical sensor for sensitive detection of bisphenol A based on poly-β-cyclodextrin/electroreduced graphene modified glassy carbon electrode

被引：73
作者：
Zhang, Xia [1 ]
Wu, Liang [1 ]
Zhou, Jiawan [1 ]
Zhang, Xiaohua [1 ]
Chen, Jinhua [1 ]
机构：
[1] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2015年 / 742卷
关键词：
Ratiometric assay; Electrochemical sensor; Bisphenol A; Poly-beta-cyclodextrin; SCREEN-PRINTED ELECTRODE; SINGLE-WALLED CARBON; PASTE ELECTRODE; AMPEROMETRIC BIOSENSOR; SILVER NANOPARTICLES; ORGANIC POLLUTANTS; CYCLODEXTRIN; OXIDE; NANOCOMPOSITE; ISOMERS;
D O I：
10.1016/j.jelechem.2015.02.006
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A ratiometric electrochemical sensor has been developed for highly sensitive and selective detection of bisphenol A. The assay strategy was based on the competitive host-guest interaction between poly-beta-cyclodextrin/electroreduced graphene (P beta-CD/EG) and Rhodamine B (RhB) probe or bisphenol A (BPA) target molecules. RhB can enter into the hydrophobic inner cavity of beta-CD and shows an obvious oxidation peak on the P beta-CD/EG modified glassy carbon electrode. In the presence of BPA, the RhB molecules are displaced by BPA because the host-guest interaction between beta-CD and BPA is stronger than that between beta-CD and RhB. As a result, the oxidation peak current of RhB (I-RhB) decreases and the oxidation peak current of BPA (I-BpA) increases correspondingly. The logarithmic value of I-BPA/I-RhB is linear with the logarithm of BPA concentration in the range of 1-6000 nM and the detection limit is 52 pM (S/N = 3). This strategy provides a new approach for sensitive detection of BPA, and has promising applications in the detection of organic pollutants in real environmental samples. (C) 2015 Elsevier B.V. All rights reserved.
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页码：97 / 103
页数：7
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