RESUMO
Objective To establish a quantitative analysis of multi-components with single marker (QAMS) for the simultaneous determination of chlorogenic acid, cryptochlorogenin acid, caffeic acid, hyperoside, isoquercitrin, astragalin, kaempferol in crude and processed Cuscuta australis, which is proved to be a scientific and feasible method in the quality analysis in C. australis. Methods Six relative correction factors (RCFs) of chlorogenic acid, cryptochlorogenin acid, caffeic acid, isoquercitrin, astragalin, kaempferol was established in the HPLC method with the hyperoside as the internal standard (IS), which was to calculate the mass fraction of each. The mass fraction of seven effective constituents in crude and processed C. australis was calculated by the external standard method (ESM) at the same time. Compared with the content results determined by the ESM and QAMS, the feasibility and accuracy of QAMS method were verified. Results The relative correction factor (RCF) was perfect. The detection calculated by QAMS was consistent with the results by ESM. Conclusion The method with a single marker, using the hyperoside as IS, is accurate and feasible for the quantitative analysis of six other effective constituents in C. australis.