Lin Lei, Wu Rui-mei, Liu Mu-hua, Wang Xiao-bin, Yan Lin-yuan
Guang Pu Xue Yu Guang Pu Fen Xi. 2015 Feb;35(2):404-8.
Surface-enhanced Raman spectroscopy (SERS) technique was used to analyze the Raman peaks of thiabendazole pesticides in the present paper. Surface enhanced substrates of silver nanoparticle were made based on microwave technology. Raman signals of thiabendazole were collected by laser Micro-Raman spectrometer with 514. 5 and 785 nm excitation wavelengths, respectively. The Raman peaks at different excitation wavelengths were analyzed and compared. The Raman peaks 782 and 1 012 at 785 nm excitation wavelength were stronger, which were C--H out-of-plane vibrations. While 1284, 1450 and 1592 cm(-1) at 514.5 nm excitation wavelength were stronger, which were vng and C==N stretching. The study results showed that the intensity of Raman peak and Raman shift at different excitation wavelengths were different And strong Raman signals were observed at 782, 1012, 1284, 1450 and 1592 cm(-1) at 514.5 and 785 nm excitation wavelengths. These characteristic vibrational modes are characteristic Raman peaks of carbendazim pesticide. The results can provide basis for the rapid screening of pesticide residue in agricultural products and food based on Raman spectrum.
本文采用表面增强拉曼光谱（SERS）技术分析噻苯达唑农药的拉曼峰。基于微波技术制备了银纳米颗粒表面增强基底。分别用514.5和785 nm激发波长的激光显微拉曼光谱仪采集噻苯达唑的拉曼信号。对不同激发波长下的拉曼峰进行了分析和比较。785 nm激发波长下的782和1012处的拉曼峰较强，属于C—H面外振动。而514.5 nm激发波长下的1284、1450和1592 cm(-1)处的拉曼峰较强，属于vng和C==N伸缩振动。研究结果表明，不同激发波长下的拉曼峰强度和拉曼位移不同，在514.5和785 nm激发波长下，782、1012、1284、1450和1592 cm(-1)处观察到较强的拉曼信号。这些特征振动模式是多菌灵农药的特征拉曼峰。该结果可为基于拉曼光谱快速筛选农产品和食品中的农药残留提供依据。
