[关键词]
[摘要]
目的 分析和比较辛夷全花蕾、辛夷仁和辛夷外苞片中挥发性成分的差异,为经典名方中以辛夷仁入药提供理论依据。方法 采用水蒸气蒸馏提取挥发油,气相色谱质谱联用(GC-MS)技术测定辛夷和辛夷仁中的挥发性成分,采用谱库检索结合保留指数定性对挥发性成分进行鉴定,用峰面积归一化法计算各成分的相对含量,利用主成分分析(PCA)对数据进行统计处理。结果 全花蕾、辛夷仁和辛夷外苞片中挥发油平均含量分别为1.70%、6.79%和0.45%,采用GC-MS共分别鉴定出87、82、85种化合物,主要为萜烯烃类和醇类化合物。以GC-MS数据结合PCA可以很好地区分辛夷的不同部位和不同产地。结论 辛夷仁所含挥发性成分种类与辛夷一致,但含量远高于辛夷全花蕾,经典名方以辛夷仁入药具有科学性。
[Key word]
[Abstract]
Objective To analyze the volatile components of Magnoliae Flos, Magnoliae Flos kernels, and Magnoliae Flos bracts and compare the differences of these components in order to provide a theoretical basis for the usage of kernels of Magnolia Flos in classical famous prescriptions. Methods The volatile components were extracted by steam distillation and analyzed by gas chromatography-mass spectrometry (GC-MS). The volatile components in different parts of Magnoliae Flos were identified by searching the retention index in the mass spectrometry database. The relative content of volatile components was calculated by peak area normalization method, and the data of GC-MS was further proceeded by principal component analysis (PCA). Results The average volatile components content in Magnoliae Flos, Magnoliae Flos kernels, and Magnoliae Flos bracts was 1.70%, 6.79%, and 0.45%, respectively. The numbers of compounds identified by GC-MS in those three different parts were 87, 82, and 85, respectively. These compounds mainly included terpene olefins and alcohols type chemicals. PCA method was then applied to process the GC-MS data and distinguish different parts and habitats of Magnoliae Flos. Conclusion The volatile components in the kernels of Magnoliae Flos were generally the same as those of Magnoliea Flos, while the content of which was much higher than those of whole flower bud of Magnoliae Flos. The results indicated that it was rational to use the kernels of Magnolia Flos in classical famous prescriptions.
[中图分类号]
R284.1
[基金项目]