Simultaneous Determination of 4 Components in Danzhi Qing’e Tablet by HPLC / 中国药房

ABSTRACT

OBJECTIVE:To establish a method for the contents determination of psoralen,isopsoralen,psoralenoside and isop-soralenoside in Danzhi qing’e tablet. METHODS:HPLC performed on the column of Eclipse XDB-C18 with mobile phase of metha-nol-water(51∶49,V/V)(isocratic elution,for psoralen and isopsoralen)and acetonitrile-0.1% formic acid(12∶88,V/V)(isocratic elution,for psoralenoside and isopsoralenoside)at a flow rate of 1.0 ml/min,the detection wavelength was 246 nm,column tem-perature was 30℃,and injection volume was 10 μl. RESULTS:The linear range was 3.138-200.8 μg/ml for psoralen(r=0.999 9), 3.175-203.2μg/ml for isopsoralen(r=0.999 9),3.181-101.8μg/ml for psoralenoside(r=0.999 9)and 3.169-101.4μg/ml for isopso-ralenoside (r=0.999 9);RSDs of precision,stability and reproducibility tests were lower than 2%;limits of quantitation were 0.627 5 ng,0.635 0 ng,3.181 0 ng and 3.169 0 ng,the limits of detection were 0.251 0 ng,0.254 0 ng,1.273 0 ng and 1.268 0 ng;recoveries were 95.68%-102.80%(RSD=2.4%,n=6),95.91%-102.10%(RSD=2.3%,n=6),98.64%-99.13%(RSD=0.23%,n=6) and 100.20%-101.70%(RSD=0.69%,n=6),respectively. CONCLUSIONS:The method is simple and accurate, and can be used for the simultaneous determination of psoralen,isopsoralen,psoralenoside and isopsoralenoside in Danzhi qing’e tablet.