Method for predicting content of each pesticide in mixed pesticide solution based on surface enhanced Raman spectroscopy

Abstract

The invention, which belongs to the technical field of combination of surface enhanced Raman spectroscopy detection and chemometrics, discloses a method for predicting the content of each pesticide ina mixed pesticide solution based on surface enhanced Raman spectroscopy. The method comprises the following steps: respectively preparing a plurality of kinds of pesticides which do not chemically react with one another into solutions with uniform concentrations, then mixing the pesticide solutions according to different volume ratios, then mixing the mixed pesticide solution with a synthesized surface enhanced Raman substrate, and finally, collecting a surface enhanced Raman spectrum of the mixed pesticide solution; screening characteristic spectral band intervals of the collected surface enhanced Raman spectra of the mixed pesticide solution; and finally, predicting the content of each pesticide in the mixed pesticide solution by using the optimal surface enhanced Raman spectrum characteristic spectral band interval obtained by screening. The method has the advantages of high speed, high detection precision, good stability, small calculated amount and the like, and can be used for rapid and high-precision prediction of the content of each pesticide in the mixed pesticide.

Description

technical field [0001] The invention belongs to the technical field of combination of surface-enhanced Raman spectroscopy detection and chemometrics, and specifically relates to a method for screening and quantitative analysis of characteristic band intervals based on surface-enhanced Raman spectroscopy. Background technique [0002] Surface-enhanced Raman Spectroscopy (SERS) is a surface spectroscopic technique, which is the spectrum obtained after the interaction between the molecules to be measured and rough metals such as gold, silver, and copper, which greatly enhances the intensity of the Raman spectrum . Although Raman spectroscopy can reflect the characteristic structure of molecules, the whole process of Raman scattering effect is inherently weak, and is limited by the Raman scattering cross section, so that the signal intensity of the acquired spectral peak is weak, and it is difficult to achieve the detection of trace substances. The detection requirements are no...

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: Aiming at the problem of how to more accurately analyze surface-enhanced Raman spectroscopy for quantitative analysis, the present invention proposes a method for predicting the content of each pesticide in a mixed pesticide solution based on surface-enhanced Raman spectroscopy, and develops surface-enhanced Raman spectroscopy The feature band interval screening method and the method for predicting the content of each pesticide in the mixed pesticide solution, the present invention has the advantages of high prediction accuracy, good robustness, etc.

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