| abstract |
The invention relates to an effective component of cogongrass rhizome as well as a preparation method and an application thereof. The preparation process of the effective component of the cogongrass rhizome comprises the following steps: (1)a mixture of ethyl acetate and ethanol is used as a solvent to extract the cogongrass rhizome; (2) dregs of a decoction are extracted with the ethanol so as toobtain an extracting solution; (3) the extracting solution is processed by chromatography through a chromatographic column to obtain an eluent; (4) the eluent is eluted by prepared liquid chromatogra m gradient and is collected for 4.0-8.0 minutes, 8.0-12.0 minutes, 20.0-24.0 minutes, 24.0-28.0 minutes, 28.0-32.0 minutes, 32.0-36.0 minutes, 36.0-40.0 minutes, 40.0-44.0 minutes, 44.0-48.0 minutes; 48.0-52.0 minutes, 52.0-56.0 minutes, 56.0-60.0 minutes and 60.0-64.0 minutes to obtain the effective component by taking water and acetonitrile as flow phases. |