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首页> 外文期刊>RSC Advances >Enhancement of plasmonic resonance through an exchange reaction on the surface of silver nanoparticles: application to the highly selective detection of triazophos pesticide in food and vegetable samples
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Enhancement of plasmonic resonance through an exchange reaction on the surface of silver nanoparticles: application to the highly selective detection of triazophos pesticide in food and vegetable samples

机译：通过在银纳米粒子表面上的交换反应提高等离子体共振：应用于食品和蔬菜样品中三唑农药的高选择性检测

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摘要

We report a simple and novel colorimetric assay for the highly selective detection of triazophos pesticide using the localized surface plasmon resonance (LSPR) of citrate capped silver nanoparticles (AgNPs) as a sensing probe. To the best of our knowledge, to date there is no report for the colorimetric detection of triazophos pesticide in food and vegetable samples using AgNPs as a colorimetric probe. The proposed method is based on the aggregation of AgNPs through a selective interaction of both sulfur and nitrogen moieties of triazophos with the NPs. The color change and red shift of the LSPR of AgNPs in the UV-visible region is due to the exchange of citrate capped ions with triazophos from the surface of NPs. Control experiments and theoretical investigations were also carried out to confirm the interactions and exchange reaction between AgNPs and triazophos pesticide. The calibration curve was found to be linear over the range of 10-300 ng mL(-1) with a limit of detection (LOD) of 3 ng mL(-1). Good recovery percentage (92.4-96.0%) and RSD (2.4-3.6%) showed the selectivity with better precision for the determination of the target pesticide from complex sample matrices. The advantages of the proposed method are simple, rapid and highly selective detection of triazophos from food and vegetable samples.
机译：我们通过柠檬酸盖银纳米颗粒（AgNP）的局部表面等离子体共振（LSPR）作为感测探针，报告了一种简单而新颖的比色测定用于高精度检测三唑酯农药。迄今为止，迄今为止，迄今为止，使用AgNP作为比色探针，没有报告食品和蔬菜样品中的三氮杂杀虫剂的比色性检测。所提出的方法基于AgNP的聚集，通过硫和氮素部分与NPS的三唑和氮素部分的选择性相互作用。 UV可见区域中AgNP的LSPR的颜色变化和红色移位是由于柠檬酸覆盖离子与来自NPS表面的三唑酯的交换。还进行了对照实验和理论研究，以确认agnps和三唑农药之间的相互作用和交换反应。发现校准曲线在10-300ng ml（-1）的范围内是线性的，其具有3ng ml（-1）的检测限（LOD）。良好的恢复百分比（92.4-96.0％）和RSD（2.4-3.6％）显示了从复杂样品基质测定靶农药的更好精度的选择性。所提出的方法的优点是从食物和蔬菜样品中简单，快速且高度选择性地检测三唑肌。

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  • 来源
    《RSC Advances》 |2016年第84期|共9页
  • 作者

    Shrivas Kamlesh; Nirmalkar Nidhi; Ghosale Archana; Thakur Santosh Singh; Shankar Ravi;

  • 作者单位

    Guru Ghasidas Vishwavidyalaya Dept Chem Bilaspur CG India;

    Guru Ghasidas Vishwavidyalaya Dept Chem Bilaspur CG India;

    Guru Ghasidas Vishwavidyalaya Dept Chem Bilaspur CG India;

    Guru Ghasidas Vishwavidyalaya Dept Chem Bilaspur CG India;

    South Dakota Sch Mines &

    Technol Nanosci &

    Nanoengn Program Rapid City SD 57701 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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