A Simple and Sensitive Method for Detecting Thiamethoxam Residues Using β-CD-AgNP
摘要
A new surface-enhanced Raman spectroscopy (SERS) method for the determination of thiamethoxam (TBZ) on the surface of fruit was developed using β-cyclodextrin (β-CD)-coated AgNPs as substrates. When using it to detect 10−8 M methylene blue, the characteristic peak was still clearly visible. In addition, β-CD-AgNP substrates can be used for SERS detection of low concentration TBZ on apple surfaces, which can detect TBZ as low as 7.3 × 10−8 M. The results indicated that this substrate based on silver nanoparticles has high sensitivity for rapid detection of pesticide residues.