中文摘要：本文研究了采用柠檬酸修饰纳米银的局部表面等离子共振作为传感探头的比色分析阵列及其在高特异性检测三唑磷农药残留中的应用。本文采用控制实验和理论实验共同来确认纳米银与三唑磷农药的相互作用和交换反应。结果显示，校准曲线线性范围为10-300 ng/mL，检测限为3ng/mL，相对标准差为2.4-3.6%，说明该方法可高特异性和高精准度检测复杂基质样本中目标农药残留，具有简单、快速、高特异性检测食物和蔬菜中三唑磷农药残留等优点。
外文摘要：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.
 
外文关键词：GOLD NANOPARTICLES; ENVIRONMENTAL-SAMPLES; COLORIMETRIC DETECTION; AQUEOUS-SOLUTION; WATER SAMPLES; ASSAY; INSECTICIDES; RECOGNITION; RESIDUES; FRUITS
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.
期刊名称：RSC ADVANCES
期刊影响因子：3.289
出版年份：2016
出版刊次：6
点击下载：通过表面银纳米离子交换反应的等离子共振增强：食物和蔬菜中三唑磷残留的高特异性检测应用