Determination of epimedin C, icariin, psoralen, and isopsoralen in Xianling Gubao Capsula by HPLC Comparative study on absorption kinetics in intestines of rats of Epimedii Folium of Xianlinggubao capsules prepared by different processes Determination of Epimedin C and Icariin in Herba Epimedii by HPLC Research on quality of Epimedium extract in market Preparation of epimedoside A and epimedin C reference substance from Epimedium wushanense by HPLC Preparation of epimedoside A and epimedin C reference substance from Epimedium wushanense by HPLC Quality evaluation of Epimedium sagittatum in different populations based on icariin contents Application of blending raw materials in quality consistency control of Qianlie Shule Capsule