Determination the concentration of drug Danshensu in rats sera by HPLC / 中国医师杂志

ABSTRACT

Objective To establish a method to determine the concentration of Danshensu in rats sera by HPLC after rats were fed with Kangxianerhao(KXEH) extract.Metheds Rats were given 0.45g or 0.55g KXEH extract 7 times in 4 days by gavage,and blood were collected from heart of rats at different time.Condition of HPLC C18A column was used,the mobile phase was consist of a mixture of acetonitrile-H_3PO_4,the detection wavelength was 205nm.Result Concentration of KXEH reached the highest level one hour after administration of KXEH in different doses,which showed that high dose of drug got higher concentration of drug Danshensu in serum than the medium dose.Linear correlation was obtained over the concentration of 76～1520mg/L,r=0.9932.Average recoveries of samples were 98.3%,101.5%,99.3% respectively at different dose of 76mg/L、304mg/Land 1520mg/L,with RSD was 5.9%、2.5%、2.0% respectively.It was proved indirectly that the concentration of KXEH in rat serum after administraion of KXEH extract reached effective concentration in blood.Conclusion It shows that large dose KXEH get higher concentration of Danshensu in blood than the medium dose.The concentration of drug serum is quantitated by HPLC assay.