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Development of Molecularly Imprinted Conducting Polymer Composite Film-Based Electrochemical Sensor for Melamine Detection in Infant Formula
ACS Omega ( IF 3.7 ) Pub Date : 2020-02-18 , DOI: 10.1021/acsomega.9b03747 Melkamu Biyana Regasa 1 , Tesfaye Refera Soreta 2 , Olu Emmanuel Femi 1 , Praveen C Ramamurthy 3
ACS Omega ( IF 3.7 ) Pub Date : 2020-02-18 , DOI: 10.1021/acsomega.9b03747 Melkamu Biyana Regasa 1 , Tesfaye Refera Soreta 2 , Olu Emmanuel Femi 1 , Praveen C Ramamurthy 3
Affiliation
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Simple, fast, and sensitive molecularly imprinted composite thin-film-based electrochemical sensor developed by using in situ co-electropolymerization of aniline and acrylic acid in the presence of melamine as a template is described here. The prepolymerization complex formation was studied by using Fourier transform infrared (FTIR) spectrophotometry, while the film formation was performed and characterized by cyclic voltammetry, Fourier transform infrared (FTIR), and scanning electron microscopy (SEM). The optimization of important parameters and removal of melamine generated the binding sites in the polymer matrix, which can recognize melamine specifically. Electrochemical measurements were performed to achieve the linear range, the limit of quantification, and limit of detection of 0.1–180, 0.0573, and 0.0172 nM, respectively. The sensitivity of the sensor was attributed to the synergistic effects of amine from aniline and the carboxylic group from acrylic acid to form multiple noncovalent interactions with the template. Melamine-spiked infant formula and raw milk were analyzed by the developed sensor, and the recovery range of 95.87–105.63% with a relative standard deviation of 1.11–2.23% was obtained. The results showed that the developed sensor using the new composite polymer receptor is promising for the online monitoring of melamine in the food industries in the future.
中文翻译：
开发用于婴儿配方奶粉中三聚氰胺检测的分子印迹导电聚合物复合膜电化学传感器
本文描述了在三聚氰胺作为模板的情况下，利用苯胺和丙烯酸的原位共电聚合开发的简单、快速、灵敏的分子印迹复合薄膜电化学传感器。利用傅里叶变换红外（FTIR）分光光度法研究了预聚合络合物的形成，并利用循环伏安法、傅里叶变换红外（FTIR）和扫描电子显微镜（SEM）对成膜进行了表征。重要参数的优化和三聚氰胺的去除在聚合物基质中产生了结合位点，可以特异性识别三聚氰胺。进行电化学测量以实现线性范围、定量限和检测限分别为 0.1-180、0.0573 和 0.0172 nM。传感器的灵敏度归因于苯胺中的胺和丙烯酸中的羧基与模板形成多种非共价相互作用的协同效应。利用所开发的传感器对添加三聚氰胺的婴儿配方奶粉和原料奶进行分析，回收率范围为95.87%~105.63%，相对标准偏差为1.11%~2.23%。结果表明，所开发的使用新型复合聚合物受体的传感器有望用于未来食品行业中三聚氰胺的在线监测。
更新日期：2020-03-03
中文翻译：
开发用于婴儿配方奶粉中三聚氰胺检测的分子印迹导电聚合物复合膜电化学传感器
本文描述了在三聚氰胺作为模板的情况下，利用苯胺和丙烯酸的原位共电聚合开发的简单、快速、灵敏的分子印迹复合薄膜电化学传感器。利用傅里叶变换红外（FTIR）分光光度法研究了预聚合络合物的形成，并利用循环伏安法、傅里叶变换红外（FTIR）和扫描电子显微镜（SEM）对成膜进行了表征。重要参数的优化和三聚氰胺的去除在聚合物基质中产生了结合位点，可以特异性识别三聚氰胺。进行电化学测量以实现线性范围、定量限和检测限分别为 0.1-180、0.0573 和 0.0172 nM。传感器的灵敏度归因于苯胺中的胺和丙烯酸中的羧基与模板形成多种非共价相互作用的协同效应。利用所开发的传感器对添加三聚氰胺的婴儿配方奶粉和原料奶进行分析，回收率范围为95.87%~105.63%，相对标准偏差为1.11%~2.23%。结果表明，所开发的使用新型复合聚合物受体的传感器有望用于未来食品行业中三聚氰胺的在线监测。
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