RESUMO
Objective To establish a method for simultaneous determination for the contents of four flavones (ononin, calycosin, genistein and formononetin) of Hedysari Radix in Gansu Province with quantitative analysis of multi-components by single-marker (QAMS); To prove its feasibility and accuracy. Methods Calycosin was taken as internal standard substance. Relative correction factors (RCF) of ononin, genistein and formononetin to calycosin were established. The contents of ononin, calycosin, genistein and formononetin were determined to realize QAMS. Results RCF was with good repeatability. The results of QAMS were consistent with the results of the external standard method. Conclusion The method that determines the contents of ononin, genistein and formononetin with calycosin as internal standard substance, can be used for quantitative analysis of Hedysari Radix.