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<p>A novel surface-enhanced Raman scattering (SERS) substrate was developed to determination of the pesticide carbendazim (CBZ) through the green synthesis of silver nanoparticles (SA-AgNPs-CD) using sodium alginate as a reducing agent and α-cyclodextrin as a molecular recognition stabilizer. The composite material was systematically characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and UV–vis spectroscopy. The analysis revealed spherical nanoparticles with an average diameter of approximately 59&#xa0;nm and localized surface plasmon resonance at 412&#xa0;nm. 4-aminothiophenol (PATP) was used as a SERS probe to discuss the SERS activity of the substrate and multivariate optimization of detection parameters (substrate–analyte ratio 3:1, pH 6.8, 15&#xa0;min adsorption, and sequential reagent addition) via orthogonal experimental design. The linear response which extends from 5.0 × 10<sup>−5</sup> to 1.0 × 10<sup>−7</sup>&#xa0;mol/L for CBZ combined with principal component analysis (PCA) revealed an ideal linear relationship between CBZ concentration and principal component F<sub>1</sub>, achieving a limit of detection (LOD) of 1.95 × 10<sup>−9</sup>&#xa0;mol/L. It is expected that this SERS strategy will provide great value for rapid detecting pesticide residues in fruits and food products.</p>

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Detection of carbendazim with SA-AgNPs-CD functionalized silver nanoparticles as substrates based on surface-enhanced Raman scattering

  • 期刊论文

  • 发表日期：

    2025年7月23日

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  • Yufeng Chen,
  • Yutong Li

摘要

A novel surface-enhanced Raman scattering (SERS) substrate was developed to determination of the pesticide carbendazim (CBZ) through the green synthesis of silver nanoparticles (SA-AgNPs-CD) using sodium alginate as a reducing agent and α-cyclodextrin as a molecular recognition stabilizer. The composite material was systematically characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and UV–vis spectroscopy. The analysis revealed spherical nanoparticles with an average diameter of approximately 59 nm and localized surface plasmon resonance at 412 nm. 4-aminothiophenol (PATP) was used as a SERS probe to discuss the SERS activity of the substrate and multivariate optimization of detection parameters (substrate–analyte ratio 3:1, pH 6.8, 15 min adsorption, and sequential reagent addition) via orthogonal experimental design. The linear response which extends from 5.0 × 10−5 to 1.0 × 10−7 mol/L for CBZ combined with principal component analysis (PCA) revealed an ideal linear relationship between CBZ concentration and principal component F1, achieving a limit of detection (LOD) of 1.95 × 10−9 mol/L. It is expected that this SERS strategy will provide great value for rapid detecting pesticide residues in fruits and food products.