The harmful and destructive effects of excessive consumption of thiourea in various industries and agriculture have caused health and environmental concerns. Hence, attention has been paid to the need for analysis and detection thiourea at very low concentrations. The aim of this study was to determine the efficiency of electrochemical sensor based on glass carbon electrode modified with Ag nanoparticles and alizarin yellow to detect thiourea as a pollutant. Glass carbon electrode was first modified by alizarin yellow polymer and Ag nanoparticles through electropolymerization and chronoamperometry methods, respectively. The characteristics of the modified electrode were determined through FESEM and EDAX analysis and thiourea concentration was measured through cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. The results showed that the linear range, limit of detection, and sensitivity were 10 to 940 µM, 3.3 µM and 0.181 µA/µM, respectively. The stability and reproducibility of the sensor response as well as the interference effect of some anion species were investigated on the performance of the sensor in determining thiourea. The results indicate the optimum stability and reproducibility and no interference effect of the studied species on efficiency of the sensor in determining thiourea.

中文翻译：

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基于银纳米颗粒和茜素黄聚合物的灵敏电化学传感器的制备：在环境污染物硫脲检测中的应用

硫脲在各行各业和农业中过度消费的有害和破坏性影响已引起健康和环境问题。因此，人们已经注意到对非常低浓度的硫脲进行分析和检测的需要。本研究的目的是确定基于用银纳米颗粒和茜素黄修饰的玻璃碳电极的电化学传感器检测硫脲作为污染物的效率。玻璃碳电极首先分别通过电聚合和计时电流法由茜素黄聚合物和银纳米粒子改性。通过FESEM和EDAX分析确定修饰电极的特性，并通过循环伏安法（CV）和差分脉冲伏安法（DPV）方法测量硫脲浓度。结果表明，线性范围、检测限和灵敏度分别为 10 至 940 µM、3.3 µM 和 0.181 µA/µM。研究了传感器响应的稳定性和重现性以及某些阴离子种类的干扰效应对传感器测定硫脲的性能。结果表明，所研究的物种具有最佳稳定性和重现性，并且对传感器测定硫脲的效率没有干扰影响。