Yamuna Annamalai, Karikalan Natarajan, Lee Tae Yoon
Department of Biomedical Engineering and Department of Convergence System Engineering, Chungnam National University, Daejeon 34134, Republic of Korea.
Department of Biomedical Engineering and Department of Convergence System Engineering, Chungnam National University, Daejeon 34134, Republic of Korea; Department of Technology Education, Chungnam National University, Daejeon 34134, Republic of Korea.
J Hazard Mater. 2022 Aug 5;435:128988. doi: 10.1016/j.jhazmat.2022.128988. Epub 2022 Apr 22.
Growing food demand and climate change have led to the development of various pest control agents to increase crop yields. Although pesticides help meet the food demand, they cause harm to human health and the environment. Metribuzin (MTBZ) is one of the common herbicides used for controlling weeds. Therefore, monitoring MTBZ residues in soil and water bodies is essential for decreasing risk to the environment and human health. This paper reports a highly selective and sensitive electrochemical sensor electrode based on a NiTeO-phase-integrated NiTeO/expanded graphite (referred to here as NTO-eGR) composite for the detection of MTBZ. The NTO-eGR composite was prepared by a one-step low-temperature hydrothermal method and characterized by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and electron microscopy techniques. The NiTeO phase was found to be an active component in the NTO/eGR composite, which exhibited satisfactory analytical performance in MTBZ detection with a sensitivity of 1.454 µA µM cm. Moreover, the NTO-eGR electrode exhibited high selectivity to MTBZ even in the presence of a five-fold excess of interfering species in water and soil samples. The studies on practical applicability revealed that NTO-eGR exhibits good reproducibility with a relative standard deviation of 2.67% (n = 5). Moreover, good recoveries of greater than 90% were achieved in the determination of MTBZ in soil and water samples. Hence, the NTO-eGR sensor electrode is highly suitable for the rapid on-site determination of MTBZ.
不断增长的粮食需求和气候变化促使人们研发各种害虫防治剂以提高作物产量。尽管农药有助于满足粮食需求，但它们会对人类健康和环境造成危害。嗪草酮（MTBZ）是常用的除草剂之一，用于控制杂草。因此，监测土壤和水体中的MTBZ残留对于降低对环境和人类健康的风险至关重要。本文报道了一种基于NiTeO相集成的NiTeO/膨胀石墨（以下简称NTO-eGR）复合材料的高选择性和高灵敏度电化学传感器电极，用于检测MTBZ。NTO-eGR复合材料采用一步低温水热法制备，并通过X射线衍射、拉曼光谱、X射线光电子能谱和电子显微镜技术进行表征。发现NiTeO相是NTO/eGR复合材料中的活性成分，在MTBZ检测中表现出令人满意的分析性能，灵敏度为1.454 μA μM cm。此外，即使在水和土壤样品中存在五倍过量的干扰物质的情况下，NTO-eGR电极对MTBZ仍表现出高选择性。实际适用性研究表明，NTO-eGR具有良好的重现性，相对标准偏差为2.67%（n = 5）。此外，在土壤和水样中MTBZ的测定中回收率大于90%。因此，NTO-eGR传感器电极非常适合快速现场测定MTBZ。
