Abdulrasool Noor Raad, Okman Koçoğlu İrem
Department of Chemistry, Faculty of Science, Karabük University, 78050, Karabük, Turkey.
Anal Bioanal Chem. 2025 May 26. doi: 10.1007/s00216-025-05923-y.
An electrochemical sensor based on carboxylated multi-walled carbon nanotubes (c-MWCNT), CoO nanoparticles (CoONP), and poly-L-valine (PolyVal) was fabricated for the simultaneous determination of hydroquinone (Hyd), catechol (Cat), and resorcinol (Res). The optimum amounts of modification materials on the electrode surface and the optimum pH of the working solution were determined to achieve the best electrode performance. Under optimum conditions, individual determination of each analyte was performed in the presence of other analytes. Simultaneous determination of Hyd, Cat, and Res was also carried out, and the performance characteristics of the electrode, such as working range, LOD, reusability, reproducibility, and selectivity, were evaluated for each analyte. In the simultaneous determination for Hyd, Cat, and Res, the linear working ranges were 5-260 µM, 5-280 µM, and 31-550 µM, and the LOD values were 3.62 µM, 2.57 µM, and 7.97 µM, respectively. The presented electrochemical sensor was successfully applied to the simultaneous determination of Hyd, Cat, and Res in tap water and river water, and satisfactory recovery values were obtained.
基于羧基化多壁碳纳米管（c-MWCNT）、氧化钴纳米颗粒（CoONP）和聚-L-缬氨酸（PolyVal）制备了一种电化学传感器，用于同时测定对苯二酚（Hyd）、邻苯二酚（Cat）和间苯二酚（Res）。确定了电极表面修饰材料的最佳用量和工作溶液的最佳pH值，以实现最佳电极性能。在最佳条件下，在其他分析物存在的情况下对每种分析物进行单独测定。还进行了Hyd、Cat和Res的同时测定，并针对每种分析物评估了电极的性能特征，如工作范围、检测限、可重复使用性、重现性和选择性。在Hyd、Cat和Res的同时测定中，线性工作范围分别为5-260 μM、5-280 μM和31-550 μM，检测限值分别为3.62 μM、2.57 μM和7.97 μM。所提出的电化学传感器成功应用于自来水和河水中Hyd、Cat和Res的同时测定，并获得了令人满意的回收率。
