The invention relates to a biological preparation method of a
Hypericum perforatum L extractive, providing a preparation method which can utilize medicinal
material resources adequately, has simple process, is suitable for large-scale production and can prepare the
Hypericum perforatum L extractive in accordance with or higher than international standards. The method comprises the following steps of:
drying the
Hypericum perforatum L firstly and smashing into
Hypericum perforatum L
powder, then weighing
enzyme, adding
warm water in the
enzyme to dissolve the
enzyme, activating enzyme solution by water bath, mixing the
Hypericum perforatum L
powder with water, performing water bath, soaking, cooling, adjusting pH with
hydrochloric acid, stirirng uniformly, heating by water bath, adding the actived enzyme solution, mixing uniformly, performing enzymolysis, filtering, abandoning the filter to obtain medicinal material
powder after enzymolysis, adding
ethanol and fluxing for extraction, filtering, combining the filtrate, condensing under reduced pressure, recycling
ethanol, and
drying to obtain the
Hypericum perforatum L extractive. The invention improves the content of
hypericin in the extractive and the abandoned filtrate after enzymolysis takes away a large amount of water-soluble impurities so that the
moisture of the extractive is not needed to absorb again. The biological method is safe,
pollution free and has simple operation and is easy for industrialized application.