酸枣不同部位的红外光谱分析

Analysis of Different Part of Z.jujuba.var.spinosa by Fourier Transform Infrared Spectroscopy

采用傅里叶变换红外光谱、二阶导数和二维相关红外光谱技术对酸枣的不同部位进行了分析与评价研究。酸枣不同部位的一维光谱和二阶导数谱中峰位和峰强有明显差异,在1750～1300 cm-1范围存在一些共有特征峰,对主要吸收峰进行了化学成分或基团的归属分析。在1300～850 cm-1范围内的二维相关谱中,酸枣根、叶均有4个明显的自动峰;酸枣核有2个明显的自动峰,酸枣仁只有1个自动峰,直观的反映出3者的差异。可见红外光谱法结合二维相关红外光谱技术为药材不同部位的成分差异分析提供了一种全面、快速的方法和手段。

An analytic method with Fourier transform infrared spectroscopy（FT-IR） with two dimensional correlation spectroscopy（2D-IR） was established to analyze and evaluate chemical constituent in the different parts of Z.jujuba.var.spinosa.The shape and intensity of the peaks were distinct in single-dimensional FT-IR and the secondary derivative IR spectra of the different parts from Z.jujuba.var.spinosa.Some common peaks in the range of 1750-1300 cm^-1 and major peaks were analyzed and assigned to chemical constituent or group.The fingerprint characters of the different parts in 2D-IR spectra were visualized.In the range of 1300-850 cm-1,3 strong autopeaks arised in the root and leaf,2 autopeaks in the hardcore,and 1 autopeak in the seed.FTIR combined with 2D-IR was a rapid and comprehensive approach to analyze and evaluate the imperceptible differences among diffe-rent parts of the medicinal herbs.