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利用激光拉曼光谱对蔬菜红辣椒表面的农药甲基毒死蜱模拟残留进行了测定,选择红辣椒中富含的β-胡萝卜素的1444.0cm~(-1)作为内标信号,与农药甲基毒死蜱本身的649.4cm~(-1)特征拉曼光谱组成相对光谱强度,结果表明相对光谱强度与农药甲基毒死蜱残留量有着很好的线性关系,其线性关系为R=0.143V+2.023,线性相关系数为0.9895。研究表明利用激光拉曼光谱内标法在特定条件下可用于农药残留的测定。
Laser Raman spectroscopy was used to determine the simulated residues of methyl chlorpyrifos on the surface of vegetable red pepper. The 1444.0 cm -1 rich β-carotene in red pepper was selected as the internal standard signal to select the pesticide methyl chlorpyrifos The relative spectral intensity of its own 649.4cm -1 characteristic Raman spectrum shows that the relative spectral intensity has a good linear relationship with the residual amount of pesticide methyl chlorpyrifos, and the linear relationship is R = 0.143V + 2.023, which is linearly correlated The coefficient is 0.9895. The results show that the laser Raman spectroscopy internal standard method can be used for the determination of pesticide residues under certain conditions.