Objective To determine the content of emodin in santongkan capsule by reversed phase(RP) high performance liquid chromatography(HPLC).Methods The HPLC system consisted of Nova Pak R○ C 18 column(4?μm,150?mm×3.9?mm),methanol∶0.1% phosphoric acid (85∶15) mixture as mobile phase,detection at 254?nm,flow rate 1?ml·min -1 ,and column temperature at 28?℃.Result The standard curve of emodin was linear in the concentration range of 1~5?mg·L -1 .The average recovery rate was 97.8% and relative standard was 1.34%( n =5).Conclusion RP HPLC assay is simple,accurate and sensitive. |