Molecularly Imprinted Impedimetric Sensor for Determination of Mycotoxin Zearalenone

被引：37
作者：
Radi, Abd-Elgawad [1 ]
Eissa, Alsayed [1 ]
Wahdan, Tarek [2 ]
机构：
[1] Damietta Univ, Dept Chem, Fac Sci, Dumyat 34517, Egypt
[2] El Arish Univ, Dept Chem, Fac Sci, Al Arish 45111, Egypt
来源：
ELECTROANALYSIS | 2020年 / 32卷 / 08期
关键词：
Zearalenone; Molecularly imprinted polymer; o-Phenylenediamine; Electrochemical sensor; Electrochemical impedance spectroscopy; Screen-printed gold electrode; IMPEDANCE SPECTROSCOPY; O-PHENYLENEDIAMINE; POLYMER; DEOXYNIVALENOL; NIVALENOL; CEREALS; MAIZE;
D O I：
10.1002/elan.201900528
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The mycotoxin zearalenone (ZEA) prompts reproductive toxicity due to its strong estrogenic effects. In this work, an electrochemical sensor for determination of ZEA was developed by electropolymerization of a molecularly imprinted poly (o-phenylenediamine) (PPD) film on screen-printed gold electrode (SPGE) surface. The sensor was examined by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) using K-3[Fe(CN)(6)]/K-4[Fe(CN)(6)] as redox probe. The molecularly imprinted polymer (MIP) sensor showed a wide determination range from 2.50 to 200.00 ngmL(-1) for ZEA. The Limit of detection (LOD) was calculated to be 0.20 ngmL(-1), based on the signal to noise (S/N) ratio equal to 3.0. The sensor displayed good repeatability, with RSD values <= 4.6 %, and maintained 93.2 % of its initial response after storage for 10 days in air at room temperature. The developed method was successfully applied for the determination of ZEA in corn flakes with mean recoveries ranged from 96.2 % to 103.8 % and RSDs within the interval of 2.1 % to 3.8 %.
引用
收藏
页码：1788 / 1794
页数：7
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