ABSTRACT
Objective To established a method for the determination of puerarin. Method The sample solutions were pretreated by solid phase extraction (SPE): the specimens were eluted and the cartridges saturated gradually by them in the SPE, but the strongly absorbed impurities were held by the cartridges all the same, and then the effluents were measured by HPLC. Results The linear range of puerarin was 0.205～ 2.464? g, r=0.9999. The average recovery of puerarin in Xintong Oral Liquid, Radix Purerariae and Ganmao Zhike Capsule were 99.5 % , 99.9 % and 98.5 % , RSD were 1.67 % , 1.45 % and 0.95 % (n=5) respectively. Conclusion The method is simple and accurate and can be used for the determination of puerarin in the Chinese patent medicines containing Radix Purerariae.
ABSTRACT
Objective: To establish the method for determination of taurocholic acid in the Traditional Chinese Medicine Shedanchuanbei Oral Liquid and snake bile. Methods: The sample was prepared as mixed solution containing methanol and KH 2PO 4. The mixed solution was injected into Sep Pak C 18 cartridge for the purpose of sample purity. In this processing, the substances which having strong retain action and could harm analytic column were hold in the Sep Pak C 18 cartridge. The eluting solution that the Sep Pak C 18 cartridge had be over loading for taurocholic acid was used as the test solution. The test solution was measured by RP HPLC. The chromatographic conditions were as followed: Supelcosil LC 8 column(150mm?4.6nm,5?m) as analytic column, detect wavelength at 203nm, and MeOH 0.4%KH 2PO 4 mixed solution(56∶44, V/V ) as mobile phase. The inject volume was 50?L. Results: The linear response range of sodium taurocholate was from 0.0253mg?mL -1 to 0.253mg?mL -1 , and the correlation coefficient was 0.9999. The average recovery rate was 101.3%, RSD was 0.40%( n =6). Conclusion: This method was simple, efficient and suitable to the quality control for Shedanchuanbei Oral Liquid and snake bile.
ABSTRACT
Objective: To establish a method for determination of forsythin in Shuanghuanglian Oral (Flos Lonicerae, Radix Scutellariae, Fructus Forsythiae, etc.) Methods: After processing by RP SPE (reverse phase solid phase extraction), the sample solution was measured by RP HPLC. The chromatographic conditions were: Prodigy ODS (3) (150?4.6mm,5?m) column as analytic column; MeOH H 2O HAc(40∶60∶1,V/V) as mobile phase; detection wavelength at 227nm; column temperature at 35?C ; flow rate at 1.0mL?min -1 . Results: The linear range of forsythin was 0.1～2.0?g, r =0.9997. The average recovery was 102.2%, RSD =0.61%( n =6). Conclusion: The method is simple, accurate, reproducible and can be used to enhance the quality control of this drug.