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目的初步建立溴氰菊酯农药和啶虫脒农药的拉曼光谱研究方法。方法利用激光拉曼光谱技术,将农药溶液装满铝盒,采集农药溶液的拉曼光谱曲线,运用自主编写的程序对光谱曲线进行预处理,以去除光谱噪音并扣除荧光背景,进而探讨溴氰菊酯农药和啶虫脒农药的快速无损检测方法。结果溴氰菊酯农药和啶虫脒农药的拉曼特征频率较为丰富,选取574 cm-1、736 cm-1处的拉曼信号可识别溴氰菊酯农药,检测限为2500mg/kg。选取752 cm-1、840 cm-1处的拉曼信号可识别啶虫脒农药,当溶剂的丙酮-水比例为1:5时,最适合作为检测溶剂配置啶虫脒农药溶液,为下一步确定啶虫脒检测限奠定基础。结论本研究对实现拉曼光谱技术检测果蔬表面溴氰菊酯农药和啶虫脒农药具有重要意义。
Objective To establish a Raman spectroscopy method for the preliminary study of deltamethrin pesticides and acetamiprid pesticides. Methods Laser Raman spectroscopy was used to fill the pesticide solution with aluminum boxes. The Raman spectra of the pesticide solution were collected. The spectral curve was preprocessed by a self-programmed program to remove the spectral noise and deduct the fluorescence background. Rapid noninvasive detection of pyrethrin pesticides and acetamiprid pesticides. Results The Raman characteristics of deltamethrin pesticides and acetamiprid were more abundant. The Raman signal at 574 cm-1,736 cm-1 was used to identify deltamethrin pesticides with a detection limit of 2500 mg / kg. Select the raman signal at 752 cm-1,840 cm-1 to identify acetamiprid pesticides. When the acetone / water ratio of the solvent is 1: 5, it is most suitable as the detection solvent for the allocation of acetamiprid pesticide solution, which is the next step Determination of acetamiprid detection limit to lay the foundation. Conclusion This study is of great significance for the detection of deltamethrin pesticides and acetamiprid pesticides on fruits and vegetables by Raman spectroscopy.