术类药材的谱系聚类分析

将来源于１１个产地的术类药材用水蒸汽蒸馏,再用乙醚萃取得挥发油。采用高分辨气相色谱仪（一阶程序升温法）对挥发油样品进行色谱分析,以不同保留时间下色谱峰的面积表征样品组分的质量分数。通过计算机两两样品间平方欧氏距离,根据平均距离法原理进行术类药材的谱系聚类分析,划分术属药材的种类。

Cluster Analysis of Atractylodes for their Taxonomic Identification

A group of medicinal plant known as Atractylodes were collected from 11 regions in China for their precise taxonomic identification by cluster analysis. After water vapor distillation, their volatile oil was extracted by ether. The samples of their volatile oil were sabmitted to chrometographic analysis by adopting gas chrmatograph sith high resolution and first order pragrammed temperature method.The constituents of samples in percentage can be characterized by area of chromatographic peak and the quadratic Euclidean distance between pairwise samples were computed by computer on the basis of principle of Wald's method. The variety of crude drugs Atractylodes was thus precisely identified by cluster analysis.