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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Development and Application of 3-Chloro-1,2-propandiol Electrochemical Sensor Based on a Polyaminothiophenol Modified Molecularly Imprinted Film
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Development and Application of 3-Chloro-1,2-propandiol Electrochemical Sensor Based on a Polyaminothiophenol Modified Molecularly Imprinted Film

机译：基于聚氨基硫酚修饰分子印迹膜的3-氯1,2-丙二醇电化学传感器的开发与应用

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摘要

In this work, a novel electrochemical sensor for 3-chloro-l,2-propandiol (3-MCPD) detection based on a gold nanoparticle-modified glassy carbon electrode (AuNP/GCE) coated with a molecular imprinted polymer (MIP) film was constructed. p-Aminothiophenol (p-ATP) and 3-MCPD were self-assembled on a AuNP/GCE surface, and then a MIP film was formed by electropolymerization. The 3-MCPD template combined with p-ATP during self-assembly and electropolymerization, and the cavities matching 3-MCPD remained after the removal of the template. The MIP sensor was characterized by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and scanning electron microscopy (SEM). Many factors that affected the performance of the MIP membrane were discussed and optimized. Under optimal conditions, the DPV current was linear with the log of the 3-MCPD concentration in the range from 1.0 × 10~(-17) to 1.0 × 10~(-13) mol L~(-1) (R~2 = 0.9939), and the detection limit was 3.8 × 10~~(-18) mol L~(-1) (S/N = 3). The average recovery rate of 3-MCPD from spiked soy sauce samples ranged from 95.0% to 106.4% (RSD < 3.49%). Practically, the sensor showed high sensitivity, good selectivity, excellent reproducibility, and stability during the quantitative determination of 3-MCPD.
机译：在这项工作中，基于涂覆有分子印迹聚合物（MIP）膜的金纳米粒子修饰的玻碳电极（AuNP / GCE），开发了一种用于3-氯-1,2-丙二醇（3-MCPD）检测的新型电化学传感器。建。将对氨基硫酚（p-ATP）和3-MCPD自组装在AuNP / GCE表面，然后通过电聚合形成MIP膜。在自组装和电聚合过程中，3-MCPD模板与p-ATP结合，去除模板后仍保留与3-MCPD匹配的腔体。 MIP传感器的特征在于循环伏安法（CV），差分脉冲伏安法（DPV）和扫描电子显微镜（SEM）。讨论并优化了许多影响MIP膜性能的因素。在最佳条件下，DPV电流与3-MCPD浓度的对数在1.0×10〜（-17）至1.0×10〜（-13）mol L〜（-1）（R〜2 = 0.9939），检出限为3.8×10 ~~（-18）mol L〜（-1）（S / N = 3）。掺加酱油样品中3-MCPD的平均回收率在95.0％至106.4％之间（RSD <3.49％）。实际上，该传感器在定量测定3-MCPD的过程中显示出高灵敏度，良好的选择性，优异的重现性和稳定性。

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