Objective:HPLC was used to determine the contents of glycyrrhizic acid,isoliquiritin and isoliquiritigenin in compound liquorice tablets quantitatively.
A method for simultaneous separation and determination of two coumarins,dicumarol and cyclocoumarol,in cosmetics by HPLC-diode-array detector(DAD) was developed.
So the absorbing wavelength is selected,the operating condition optimized,and the quantitative and qualitative determination method on Polyoxin B by HPLC-DAD established.
Radix Rehmanniae, Cacumen Platycladi, Folium Artemisiae Argyi, Folium Nelumbinis were identified by TLC, and the content of quercitrin was determined by HPLC.