Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 243303, Taiwan.
Department of Chemistry, Faculty of Engineering and Technology, Jain University, Bangalore 562112, India.
Ultrason Sonochem. 2023 Jan;92:106251. doi: 10.1016/j.ultsonch.2022.106251. Epub 2022 Nov 28.
Herbicides are used constantly in agriculture to enhance productivity across the globe. This herbicide monitoring requires utmost importance since its high dose leads to ecological imbalance and a negative impact on the environment. Moreover, a quantification of toxic herbicide is one of the important problems in the food analysis. In this work, deals with the development of a simple, and facile one-pot sonochemical synthesis of strontium doped LaS (Sr@LaS). Morphological and structural characterization confirms the doping of Sr@LaS to generate a hierarchical layered structure. The electrochemical performance of modified with rotating disk electrode (RDE) using Sr@LaS composite is high, compared to LaS and bare electrodes towards the quantitative detection of mesotrione (MTO) in phosphate buffer. Sr@LaS/RDE showed good sensitivity for MTO detection and it exhibit a range of 0.01-307.01 μM and limit of detection of 2.4 nM. Besides, the selectivity of fabricated electrode is high as it can electrochemically reduce MTO particularly, even in the presence of other chemicals, biological molecules and inorganic ions. The repeatability of MTO detection is high even after 30 days with a lower RSD values. Hence, simple fabrication of Sr@LaS/RDE could be a novel electrode for the sensitive, selective, and reproducible determination of herbicides in real-time applications.
除草剂在农业中被广泛使用，以提高全球的生产力。由于高剂量的除草剂会导致生态失衡和对环境产生负面影响，因此对其进行监测至关重要。此外，对有毒除草剂进行定量分析也是食品分析中的一个重要问题。在这项工作中，我们开发了一种简单、便捷的一锅超声化学合成方法，用于制备锶掺杂的 LaS（Sr@LaS）。形貌和结构表征证实了 Sr@LaS 的掺杂生成了分层结构。与 LaS 和裸电极相比，采用 Sr@LaS 复合材料修饰的旋转圆盘电极（RDE）的电化学性能更高，可用于在磷酸盐缓冲液中对麦草畏（MTO）进行定量检测。Sr@LaS/RDE 对 MTO 的检测具有良好的灵敏度，其检测范围为 0.01-307.01 μM，检测限为 2.4 nM。此外，由于该电极可以电化学还原 MTO，即使在存在其他化学物质、生物分子和无机离子的情况下，其选择性也很高。即使在 30 天后，MTO 的检测重复性仍然很高，RSD 值较低。因此，Sr@LaS/RDE 的简单制备可为实时应用中除草剂的灵敏、选择性和可重现性测定提供一种新型电极。
