Molecularly Imprinted Impedimetric Sensor for Determination of Mycotoxin Zearalenone,Electroanalysis

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Molecularly Imprinted Impedimetric Sensor for Determination of Mycotoxin Zearalenone
Electroanalysis ( IF 2.7 ) Pub Date : 2020-03-02 , DOI: 10.1002/elan.201900528
Abd‐Elgawad Radi ₁ , Alsayed Eissa ₁ , Tarek Wahdan ₂

Affiliation

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 K₃[Fe(CN)₆]/K₄[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 %.

中文翻译：

分子印迹阻抗传感器测定霉菌毒素玉米赤霉烯酮

霉菌毒素玉米赤霉烯酮（ZEA）由于其强大的雌激素作用而引起生殖毒性。在这项工作中，通过在丝网印刷金电极（SPGE）表面上分子印迹的聚（邻苯二胺）（PPD）膜进行电聚合，开发了用于测定ZEA的电化学传感器。使用K ₃ [Fe（CN）₆ ] / K ₄ [Fe（CN）₆ ]作为氧化还原探针，通过循环伏安（CV）和电化学阻抗谱（EIS）检查传感器。分子印迹聚合物（MIP）传感器对ZEA的测定范围从2.50到200.00 ngmL ^-1不等。计算的检出限（LOD）为0.20 ngmL ^-1，基于等于3.0的信噪比（S / N）。该传感器显示出良好的可重复性，RSD值≤4.6％，并且在室温下于空气中保存10天后，保持其初始响应的93.2％。该方法成功用于玉米片中ZEA的测定，平均回收率在96.2％至103.8％之间，RSD在2.1％至3.8％之间。

更新日期：2020-03-02

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