2种蒙药中硫磺的拉曼光谱测定分析

目的: 建立蒙药孟根乌苏-18和嘎日迪-15中硫磺的拉曼光谱检测方法. 方法: 利用便携式拉曼光谱仪测量纯硫磺固体粉末和孟根乌苏-18及嘎日迪-15样品的拉曼特征峰,并对2种蒙药样品中的特征峰位进行了归属和指认.二极管激光波长:785 nm;光谱范围:68~2 700 cm^-1;光谱分辨率:小于3 cm^-1;会聚透镜焦距:6.8 mm;聚焦后的光斑尺寸:10 μm;激光功率:30 mW;积分时间:5 s. 结果: 硫磺的拉曼特征峰主要位于84、153、219、247、436、472 cm^-1处.拉曼光谱能较好地检测出蒙药孟根乌苏-18中含有的硫磺,同时以蒙药嘎日迪-15为样品基质,对硫磺进行了半定量分析,定量范围在10%~100%之间. 结论: 拉曼光谱技术可以对蒙药中的硫磺进行快速鉴别和半定量分析.

Objective: To establish a Raman spectroscopy method for the determination of sulphur in Mongolian medicine Meng Gen Wu Su-18 and Ga Ri Di-15powder. Methods: The experimental Raman spectrums of sulphur,Meng Gen Wu Su-18 and Ga Ri Di-15 were detected using a portable Raman spectrometer and the Raman characteristic peaks of sulphur obtained from the two Mongolian medicine samples have been assigned.Wavelength of the diode laser source:785 nm;spectral range:68-2 700 cm^-1;spectral resolution:better than 3 cm^-1;focal length of the convergence lens:6.8 mm;diameter of the laser focused spot:10 μm;laser power:30 mW;integration time:5 s. Results: The Raman peaks of sulphur are located at 84,153,219,247,436,and 472 cm^-1.Raman spectroscopy can be applied to the qualitatively detection of sulphur in Meng Gen Wu Su-18 Meanwhile the sulphur was semi-quantitative analyzed using Ga Ri Di-15 powders as sample matrix,The detection limit can be down to 10%. Conclusion: The established Raman spectroscopy technology can be used for the rapid identification and the semi-quantitative analysis of sulfur in the Mongolian medicine.