中文摘要：

选用X射线荧光光谱法（XRF）,对我国独创的第4代太空诱变育种桔梗、地面组桔梗和桔梗对照品的元素种类和含量进行测定与分析。结果表明,太空组桔梗中与桔梗理气、化痰功效相关的Zn,Mn,Fe等元素分别比地面组提高了1.9,2.4,0.6倍,其中Zn和Mn元素比对照品分别提高了0.6和1.9倍。即与地面组相比,太空组桔梗更趋近于或优于对照品桔梗。太空组桔梗中多种元素指标得到了大幅度的提升和优化。XRF方法具有方便快捷、灵敏度高、元素和含量范围广以及再现性好等特点,可用于一切能制成粉末样品的其他中药的测定分析。

英文摘要：

X-ray fluorescence spectrum（XRF）analytic method was used to analyze and compare the contents of various mineral elements in the ground group platycodon grandiflorum,the comparison group platycodon grandiflorum and the fourth generation platycodon grandiflorum with space flight mutagenesis breeding.The result indicated that the contents of microelements Zn,Mn and Fe in the outer space group increase by 1.9,2.4 and 0.6 times respectively,compared with those in the ground group.Microelements Zn,Mn and Fe concern curative effect such as expectorant effect in the Chinese traditional medicine.And the elements Zn and Mn increase by 0.6 and 1.9 times respectively,compared with the comparison group.The outer space group is closer and/or superior to the comparison group compared with the ground group.To conclude,the performance of the outer space group platycodon grandiflorum was upgraded obviously.X-ray fluorescence spectrum analytic method has many advantages,such as quickness,simpleness,high sensitivity,wide measure range,and easy reappearance etc.The method could be applied to the mensuration and analysis of the other traditional Chinese medicines which could be ground into powder.