SERS-based simplified analysis of paraquat in poisoning cases: Bypassing complicated pretreatment with antioxidant sensor.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Pub Date : 2025-03-15 Epub Date: 2024-12-22 DOI:10.1016/j.saa.2024.125593

Tianyu Qiu, Cheng Liu, Yan Ding, Lixiang Wang, Yuhui Liu, Yang Sun, Zhengsheng Mao, Peng Chen, Hao Sun, Feng Chen, Yue Cao

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Abstract

Applying antioxidant coating materials to prepare surface-enhanced Raman spectroscopy (SERS) sensing substrates can effectively enhance the sensitivity and stability for the analysis of molecules. In this study, we have leveraged SERS to develop an innovative sensor for the swift identification of Paraquat (PQ), enabling on-site detection of this herbicide. The newly devised sensor distinguishes itself through its exceptional oxidation resistance. This resistance is attributed to the physical properties of the nanoparticles, specifically the silver shell coating and loading on the molybdenum disulfide (MoS₂). By the creation of "hot spots" of the composite nanoparticles (Ag@AuBPs on flower-like MoS₂), the kit achieves a remarkably low detection limit as low as 1.0 × 10^-10 M for Paraquat in lake water, soil, and clothing samples, allowing for rapid and direct identification of PQ in complex environments.

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基于sers的百草枯中毒病例简化分析：绕过复杂的抗氧化传感器预处理。

应用抗氧化涂层材料制备表面增强拉曼光谱（SERS）传感基底，可以有效提高分子分析的灵敏度和稳定性。在这项研究中，我们利用SERS开发了一种创新的传感器，用于快速识别百草枯（PQ），实现了这种除草剂的现场检测。新设计的传感器以其优异的抗氧化性能而著称。这种抗性归因于纳米粒子的物理性质，特别是银壳涂层和二硫化钼（MoS2）上的负载。通过创建复合纳米颗粒的“热点”（Ag@AuBPs在花状MoS2上），该试剂盒对湖水，土壤和衣服样品中的百草枯达到了非常低的检测限，低至1.0 × 10-10 M，允许在复杂环境中快速直接识别PQ。

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