三七及其伪品二维相关红外光谱法的鉴别研究

Study on the Identification of Standard and False Panax notoginseng by Two-Dimensional Infrared Correlation Spectroscopy

采用红外光谱法和二维相关红外光谱技术,对三七及其伪品姜黄、白术进行了快速无损的鉴别研究。结果表明:在红外谱图上,三七及其伪品姜黄、白术均有黄酮、芳香类和糖苷类成分的特征吸收峰,但存在一定的差异。在二维红外谱图上,根据三者的自动峰的位置、数量和峰的相对强度的差异,可快速将三者鉴别出来。因此,常规红外光谱法和二维相关红外光谱技术相结合可实现三七的真伪鉴别。

Standard Panax notoginsengand its counterfeit Curcuma longa,Atractylodes macrocephala werei dentified fast and nondestructively by Fourier Transform Infrared Spectroscopy(FTIR)combined with two-dimensional correlation spectroscopy(2D-IR).Compared with conventional IR spectra of the samples,some certain differences were found in the characteristic peaks of flavonoids,aromatics and glycosides.In the 2D-IR correlation spectra,the samples presented the differences in the position,number and relative intensity of autopeaks and correlation peak cluters.Consequently,Fourier Transform Infrared Spectroscopy(FTIR)combined with two-dimensional correlation spectroscopy(2D-IR)can be used to identified Panax notoginseng and its counterfeit Curcuma longa,Atractylodes macrocephala.