LCCE Laboratory, Department of Chemistry, Faculty of Matter Sciences, University Batna 1, Batna 05000, Algeria.
Institut de Sciences Analytiques (ISA)-UMR 5280, Université Claude Bernard Lyon 1, 5 Rue de la Doua, 69100 Lyon, France.
Sensors (Basel). 2021 Apr 18;21(8):2850. doi: 10.3390/s21082850.
Melamine has been used as a non-protein nitrogenous additive in food products to artificially increase the apparent "false" protein content. Melamine is known as a dangerous and poisonous substance for human health and it causes diverse diseases. An electrochemical sensor for melamine detection has been developed by modification of a glassy carbon electrode using copolymer poly[DMAEMA--styrene], gold nanoparticles, and methylene blue. The characterization of the modified electrode was conducted using several analysis techniques including cyclic voltammetry (CV), differential pulse voltammetry (DPV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). The electrochemical detection of melamine was performed by impedance spectroscopy. Obtained results revealed that the developed sensor has a large detection range from 5.0 × 10 to 3.8 × 10 M with a low detection limit of 1.8 × 10 M (at S/N = 3). Various interfering species such as phenol, hydroquinone, and bisphenol A have been used and their behavior on modified electrode has been studied.
三聚氰胺已被用作食品中的非蛋白氮添加剂，以人为地提高表观“虚假”蛋白质含量。三聚氰胺被认为是对人体健康有害和有毒的物质，会导致多种疾病。通过使用共聚物聚[DMAEMA-苯乙烯]、金纳米粒子和亚甲基蓝修饰玻碳电极，开发了一种用于三聚氰胺检测的电化学传感器。通过循环伏安法（CV）、差分脉冲伏安法（DPV）、计时安培法（CA）和电化学阻抗谱（EIS）等多种分析技术对修饰电极进行了表征。通过阻抗谱法进行了三聚氰胺的电化学检测。得到的结果表明，所开发的传感器具有从 5.0×10 到 3.8×10 M 的大检测范围，检测限低至 1.8×10 M（S/N=3）。还使用了各种干扰物质，如苯酚、对苯二酚和双酚 A，并研究了它们在修饰电极上的行为。
