葛根芩连汤不同配伍对黄芩苷含量的影响

目的　建立 RP- HPL C法测定葛根芩连汤各配伍组合中的黄芩苷的含量测定方法 ,研究配伍对黄芩苷含量的影响。方法　采用 L8(2 7)正交设计及统计方法 (统计软件 SPSS10 .0 ) ,以 HPL C法测定黄芩苷的含量。结果　葛根、黄连对方中黄芩苷含量的影响差异具有显著性 (P<0 .0 5 ) ,甘草对黄芩苷含量的影响差异无显著性 (P>0 .0 5 ) ,葛根、黄连、甘草对黄芩苷含量的影响不存在两两交互作用。凡是黄连与黄芩的配伍组合皆有沉淀产生 ,并且沉淀中含有较多的黄芩苷。结论　葛根芩连汤配伍中葛根、黄连能降低黄芩苷的含量 ,甘草没有增加黄芩苷的溶出的作用。 p H值的改变可能是含黄连和黄芩配伍煎液产生沉淀的主要原因之一。

Influence of compatibility on content of baicalin in Gegen Qinlian Decoction

Object To set up the quantitative method of baicalin in Gegen Qinlian Decoction (GQD) by RP HPLC and to determine the change of baicalin contents in decoctions prepared from various combinations of GQD. Methods By L 8(2 7) orthogonal design and statistics analysis (SPSS10 0), eight decoctions with Radix Scutellariae either alone or incombination with one or more of the other three components were prepared or analyzed. Contents of baicalin in them were determined by RP HPLC. Results It was significant (P<0 05) to the difference on the content of baicalin caused by Radix Puerariae and Rhizoma Coptidis, but for Radix Glycyrrhizae Preparata, the difference was insignificant (P>0 05) and interactions between two of three were insignificant either. In this experiment, the sedimentation was found in the decoctions contained Radix Scutellariae and Rhizoma Coptidis. Conclusion The content of baicalin is reduced by Radix Puerariae and Rhizoma Coptidis, The resolution of baicalin is not increased by Radix Glycyrrhizae Preparata. Maybe the change of pH leads to the sedimentation in decoctions contained Radix Scutellariae and Rhizoma Coptidis.