Liu Guangyang, Zhang Ruonan, Li Lingyun, Huang Xiaodong, Li Tengfei, Lu Meng, Xu Donghui, Wang Jing
Key Laboratory of Vegetables Quality and Safety Control, Ministry of Agriculture and Rural Affairs of China, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
College of Life Sciences and Engineering, Hebei University of Engineering, Handan 056021, China.
Nanomaterials (Basel). 2018 Jul 6;8(7):499. doi: 10.3390/nano8070499.
Monitoring of low levels of chlorsulfuron in environmental water samples is important. Although several detection methods have been developed, they all have some drawbacks, such as being time-consuming, requiring expensive instruments and experienced operators, and consuming large volumes of organic solvents. There is an urgent need for a simple, rapid, and inexpensive detection method for chlorsulfuron. Herein, such a method was developed using anti-aggregation of gold nanoparticles (AuNPs) in the presence of acetamiprid in agricultural irrigation water samples. Aggregation of the AuNPs was induced by acetamiprid, and this produced a distinct color change from Bordeaux red to blue. However, the strong hydrogen bonding interaction between chlorsulfuron and acetamiprid could inhibit AuNP aggregation. The effect of chlorsulfuron on the anti-agglomeration behavior of AuNPs was monitored by ultraviolet⁻visiblespectroscopy (UV-Vis) and the naked eye over a concentration range 0.1⁻100 mg/L. The detection limit for chlorsulfuron was 0.025 mg/L (signal-to-noise ratio of three). This colorimetric method was successfully applied to the determination of chlorsulfuron in spiked tap water and agricultural irrigation water with satisfactory recoveries (76.3%⁻94.2%).
监测环境水样中低水平的氯磺隆具有重要意义。尽管已经开发了几种检测方法，但它们都存在一些缺点，例如耗时、需要昂贵的仪器和经验丰富的操作人员，以及消耗大量有机溶剂。迫切需要一种简单、快速且廉价的氯磺隆检测方法。在此，利用农业灌溉水样中啶虫脒存在下金纳米颗粒（AuNPs）的抗聚集作用开发了这样一种方法。啶虫脒诱导AuNPs聚集，这导致颜色从波尔多红明显变为蓝色。然而，氯磺隆与啶虫脒之间强烈的氢键相互作用可以抑制AuNP聚集。通过紫外可见光谱（UV-Vis）和肉眼在0.1 - 100 mg/L的浓度范围内监测氯磺隆对AuNPs抗团聚行为的影响。氯磺隆的检测限为0.025 mg/L（信噪比为3）。这种比色法成功应用于加标自来水和农业灌溉水中氯磺隆的测定，回收率令人满意（76.3% - 94.2%）。
Zotero 插件
