中文摘要：本文建立了一种简单、特异性的比色检测方法，该方法利用含有硝基和羟基氨基苄基吲哚衍生物的金纳米粒子对环境样本中特丁硫磷和噻虫啉杀虫剂进行检测。本文采用硝基和羟基苄基吲哚-二硫代氨基甲酸盐衍生物作为能够引起特丁硫磷和噻虫啉杀虫剂聚集的未修饰金纳米粒子表面的锚，并表现为红变绿的颜色变化且在NBI-和HBI-DTC金纳米离子表面吸收光谱的630和625 nm处出现新型表面离子体共振峰。因此，可以通过NBI-和HBI-DTC金纳米离子红变蓝的颜色变化可视化检测特丁硫磷和噻虫啉杀虫剂的浓度，并通过紫外-可见光谱进行定量检测。最佳条件下，采用NBI-和HBI-DTC金纳米离子比色系统，特丁硫磷的线性范围为0.5-50μm，噻虫啉为5-500μm。特丁硫磷和噻虫啉的检测限分别为7.3 x 10-8和6.0 x 10-7m。此外，本文成功地应用该方法对环境水和食品进行了特丁硫磷和噻虫啉杀虫剂检测，回收率达到97.16-99.31%，因此，本方法可应用于实际样本中特丁硫磷或噻虫啉杀虫剂单独残留或两种杀虫剂混合残留的检测。
外文摘要：We have tuned the applications of gold nanoparticles (Au NPs) with nitro and hydroxy benzylindoledithiocarbamate derivatives for simple and selective colorimetric detection of terbufos and thiacloprid insecticides in environmental samples. The nitro and hydroxy benzylindole-dithiocarbamate (NBI-and HBI-DTC) derivatives are used as anchors on the surfaces of unmodified Au NPs and cause the aggregation of Au NPs induced by terbufos and thiacloprid insecticides, resulting in the red-to-blue color change and the appearance of new surface plasmon resonance peaks at 630 and 625 nm in the absorption spectrum of NBI-and HBI-DTC Au NPs. On this basis, the concentrations of terbufos and thiacloprid can be visualized through the red-to-blue color change of NBI-and HBI-DTC Au NPs and quantitatively determined by UV-vis spectroscopy. Under the optimized conditions, the colorimetric systems exhibit a linear range from 0.5 to 50 mu M for terbufos and from 5.0 to 500 mu M for thiacloprid using NBI-and HBI-DTC Au NPs as probes. The detection limits (3 sigma/m) of 7.3 x 10(-8) and 6.0 x 10(-7) M were achieved for terbufos and thiacloprid, respectively. Furthermore, we demonstrate the application of the approach for the analysis of terbufos and thiacloprid in environmental water and food samples, which suggests that the present method exhibits good recoveries (97.16-99.31%) and capable to identify individual terbufos and thiacloprid or mixtures of them in real samples. (C) 2016 Elsevier B.V. All rights reserved.
外文关键词：Terbufos, Thiacloprid, NBI- and HBI- DTC-Au NPs, UV-vis spectrometry
作者：Kailasa, Suresh Kumar; Rohit, Jigneshkumar V.
作者单位：SV Natl Inst Technol, Dept Appl Chem, Surat 395007, India.
期刊名称：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
期刊影响因子：2.76
出版年份：2017
出版刊次：2
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