A method for rapid detection of residual acetamiprid in fruit peel

Abstract

The invention discloses a method for fast detecting residual acetamiprid in fruit peels. The method is characterized in that a surface enhanced Raman spectrometry (SERS) is used for building an SERS standard spectral line of the maximum acetamiprid residual quantity, conforming to the food security national standard GB2763-2014, of fruit to be detected; the fruit peels of the fruit to be detected are detected for obtaining the SERS spectral line of the fruit to be detected; the obtained SERS spectral line is compared with the SERS standard spectral line for judging whether the acetamiprid content in the fruit peels of the fruit to be detected conforms to the food security national standard or not. The method has the characteristics that the pretreatment on the fruit is not needed; no damage is caused on detecting samples; the operation process is simple; the field detection can be realized; the consumption is low, and the like. The detecting method has universality, and can be used for detecting other pesticides or toxic substances on the surfaces of vegetables and fruits with smooth surfaces through proper modification.

Description

technical field [0001] The invention relates to a method for rapidly detecting acetamiprid residues on fruit surfaces based on Raman spectroscopy, and belongs to the technical field of physical applications. Background technique [0002] The existing method for detecting whether the pesticide content on the surface of the peel is qualified is mainly liquid phase mass spectrometry. In recent years, there have been reports on the preparation of nano-silver by the sol aggregation method and the detection of residual acetamiprid on the surface of the apple peel by using the surface-enhanced Raman spectroscopy (SERS) method. However, the preparation of nano-silver by sol-condensation method is complicated, and the surface contains organic pollutants, which generate interference signals. [0003] Nano-silver film has the advantages of large specific surface area and high surface activity, and because of its surface plasmon properties, it can enhance the Raman spectrum of the subst...

AI Technical Summary

Problems solved by technology

[0002] The existing method for detecting whether the pesticide content on the surface of the peel is qualified is mainly liquid phase mass spectrometry. In recent years, there have been reports on the preparation of nano-silver by the sol aggregation method and the detection of residual acetamiprid on the surface of the apple peel by using the surface-enhanced Raman spectroscopy (SERS) method. However, the preparation of nano-silver by sol condensation method is complicated, and the surface contains organic pollutants, which generate interference signals.

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