[Comparison of 4 extraction methods of chemical constituents in medicinal tea sishen chaji]

Four extraction method for the medicinal tea Sishen Chaji, were compared with psoralen, schizandrin B and evodiamine taken as indexes. The result shows that the total contents of the three compounds decrease progressively in the following order: semi-bionic extraction, semi-bionic extraction by precipitation with alcohol, extraction with water, and extraction with water and precipitation with alcohol.