ZIF-8-wrapped AgNPs modified with β-cyclodextrin for sensitive detection of thiacloprid and imidacloprid by SERS technology

IF 5.6 1区化学 Q1 CHEMISTRY, ANALYTICAL Talanta Pub Date : 2024-07-09 DOI:10.1016/j.talanta.2024.126524

Bin Yang , Jia Liu , Xin Liu , Shiyue Niu , Fengming Zhang , Yuting Wang , Daqian Song , Shuyun Bi

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Abstract

The high efficient surface-enhanced Raman scatterring (SERS) methods to detect thiacloprid and imidacloprid were established using ZIF-8-wrapped Ag nanoparticles (AgNPs) modified with β-cyclodextrin (β-CD). The substrate of ZIF-8/β-CD@AgNPs was characterized by ultraviolet visible spectra (UV–vis), thermogravimetric analysis (TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM). The interaction between the substrate and thiacloprid/imidacloprid was also explored. The optimum measurement conditions were obtained by response surface model based on single-factor experiments. Enhancement factors (EFs) of thiacloprid and imidacloprid were respectively 2.29 × 10⁶ and 2.60 × 10⁶. A good linearity between the scattering intensity and the concentration of thiacloprid/imidacloprid within 3–1000 nmol L⁻¹/6–400 nmol L⁻¹ was established. The interference experiments indicated that the methods had good selectivity. The SERS methods were successfully applied to detect thiacloprid and imidacloprid in several vegetables samples. The recoveries ranged from 95.5 % to 105 % (n = 5). The detection limits (LODs) (S/N = 3) for thiacloprid and imidacloprid were 1.50 and 0.83 nmol L⁻¹, respectively.

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用 β-环糊精修饰的 ZIF-8 包裹的 AgNPs 利用 SERS 技术灵敏检测噻虫啉和吡虫啉。

利用β-环糊精（β-CD）修饰的ZIF-8包裹的银纳米颗粒（AgNPs）建立了高效检测噻虫啉和吡虫啉的表面增强拉曼散射（SERS）方法。通过紫外可见光谱（UV-vis）、热重分析（TGA）、X 射线衍射（XRD）、透射电子显微镜（TEM）和扫描透射电子显微镜（STEM）对 ZIF-8/β-CD@AgNPs 的基底进行了表征。此外，还探讨了基质与噻虫啉/吡虫啉之间的相互作用。在单因素实验的基础上，通过响应面模型获得了最佳测量条件。噻虫啉和吡虫啉的增强因子（EF）分别为 2.29 × 106 和 2.60 × 106。在 3-1000 nmol L-1/6-400 nmol L-1 范围内，散射强度与噻虫啉/吡虫啉浓度之间具有良好的线性关系。干扰实验表明该方法具有良好的选择性。SERS 方法被成功地应用于检测多种蔬菜样品中的噻虫啉和吡虫啉。回收率在 95.5 % 到 105 % 之间（n = 5）。噻虫啉和吡虫啉的检出限（LOD）（S/N = 3）分别为 1.50 nmol L-1 和 0.83 nmol L-1。

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来源期刊

Talanta 化学-分析化学

CiteScore

12.30

自引率

4.90%

发文量

861

审稿时长

29 days

期刊介绍： Talanta provides a forum for the publication of original research papers, short communications, and critical reviews in all branches of pure and applied analytical chemistry. Papers are evaluated based on established guidelines, including the fundamental nature of the study, scientific novelty, substantial improvement or advantage over existing technology or methods, and demonstrated analytical applicability. Original research papers on fundamental studies, and on novel sensor and instrumentation developments, are encouraged. Novel or improved applications in areas such as clinical and biological chemistry, environmental analysis, geochemistry, materials science and engineering, and analytical platforms for omics development are welcome. Analytical performance of methods should be determined, including interference and matrix effects, and methods should be validated by comparison with a standard method, or analysis of a certified reference material. Simple spiking recoveries may not be sufficient. The developed method should especially comprise information on selectivity, sensitivity, detection limits, accuracy, and reliability. However, applying official validation or robustness studies to a routine method or technique does not necessarily constitute novelty. Proper statistical treatment of the data should be provided. Relevant literature should be cited, including related publications by the authors, and authors should discuss how their proposed methodology compares with previously reported methods.