Label-Free Colorimetric Detection of Prothioconazole Using Gold Nanoparticles Based on One-Step Reaction,ACS Biomaterials Science & Engineering

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Label-Free Colorimetric Detection of Prothioconazole Using Gold Nanoparticles Based on One-Step Reaction
ACS Biomaterials Science & Engineering ( IF 5.4 ) Pub Date : 2020-03-23 , DOI: 10.1021/acsbiomaterials.0c00208
Ying Zhou _{1,

2} , Congdi Li _{1,

3} , Rong Liu ₄ , Zenglong Chen ₁ , Li Li ₁ , Wei Li ₁ , Yujian He ₃ , Longfei Yuan ₁

Affiliation

One simple, sensitive detection method for pesticide prothioconazole based on citrate-capped gold nanoparticles (AuNPs) in one step at room temperature was presented in this study. Prothioconazole could be easily linked onto the AuNPs through a Au–S covalent bond, and AuNPs undergo aggregation via hydrogen bonds formed among prothioconazole molecules. As a result, the color of AuNP solution changes from wine red to royal purple, which could be monitored by naked eyes and UV–vis spectra. This label-free visual detection method could determine prothioconazole with concentrations ranging from 1.33 to 19.99 μg/L with a detection limit of 0.38 μg/L (S/N = 3). This method was convenient and free of complex equipment and successfully applied to prothioconazole determination in rice field water where it gave satisfactory recoveries.

中文翻译：

基于一步法的金纳米颗粒无标记比色法测定丙硫菌灵

这项研究提出了一种简单，灵敏的室温下一步法检测基于柠檬酸封端的金纳米颗粒（AuNPs）的杀虫剂原药。可以将Prothioconazole容易地通过Au-S共价键连接到AuNPs上，并且AuNPs通过Prothioconazole分子之间形成的氢键进行聚集。结果，AuNP溶液的颜色从酒红色变为宝蓝色，可以用肉眼和紫外可见光谱监测。这种无标记的视觉检测方法可以测定浓度为1.33至19.99μg/ L的丙硫康唑，检出限为0.38μg/ L（S / N = 3）。该方法简便易行，无需复杂设备，可成功用于稻田水中原硫代康唑的测定，回收率令人满意。

更新日期：2020-03-23

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