Objective In this study,from the dose and days administered orally to the times of blood samples collected were researched, Chinese medicine plasma pharmacology method of Huangqin Decoction(HQD) were initially discussion and established. Methods Rats were given by HQD in gavage(ig) , plasma and serum were collected at designed times:1,3 days after administration of 1 h ,2h and 5 days after administration of 1 h,2h, 6h, 12h. Drug - containing plasma and serum containing baicalin content were determinated via HPLC -MS method. Results In this...