A kind of preparation method of Qingdai

Abstract

The invention discloses a preparation method of Qingdai, which comprises taking the leaves or stems and leaves of the Acanthaceae plant Malan, the Polygonaceae plant Polygonum indigo or the Cruciferous plant Isatis indigo, extracting them in hot water, and filtering to remove the leaf residue to obtain filtrate; the filtrate is hydrolyzed by adding an acid solution; after the hydrolysis is completed, add an alkali solution to adjust the pH value of the solution to 6-8, leave it to stand and discard the supernatant, collect the precipitate, wash until neutral, and dry to obtain Qingdai. The preparation method of the present invention provides a new way to produce Qingdai, which can avoid CaCO 3 The impact, greatly reducing the labor intensity of producing Indigo Naturalis, shortening the production cycle and so on. The content of indigo in Qingdai produced by the preparation method of the present invention is between 30.51% and 54.84%, and the content of indirubin is between 5.41% and 13.52%, which makes the content of indigo 10 to 20 times higher than that of traditional processing methods. The content of red is increased by 20 to 30 times, and the quality of Qingdai products has achieved a qualitative leap.

Description

technical field [0001] The invention belongs to the field of processing and processing of traditional Chinese medicines, in particular to a preparation method of Qingdai. Background technique [0002] Indigo Daisy is the dry powder or pellet obtained by processing the leaves or stems of Baphicacanthus cusia (Nees) Bremek., Polygonum tinctorium Ait., or Isatis indigotica Fort. lumps or granules. The traditional processing of Indigo Naturalis mainly includes three steps: soaking, indigo beating, and water-flying refining. Active ingredients such as jade red. The traditional processing of Qingdai is usually done in a family workshop. The specific steps are to take fresh horse blue leaves or stems and leaves in a soaking fermentation tank, introduce appropriate river water, soak and ferment for 1 to 2 days, and remove the residue when the liquid turns dirty green. Put in fresh lime milk, stir well, let it stand for 1-2 days, discard the supernatant, collect the substrate sedi...

AI Technical Summary

Problems solved by technology

Patent application number: CN201110152247.1, invention name: "a processing method of Qingdai", the yield of indigo in Qingdai obtained by this processing method is 1.8mg / g, and the yield of indirubin is 0.35mg / g, The yield mentioned therein is the mass mg of indigo and indirubin in crude indigo / the mass g of fresh leaves, but the obtained crude indigo contains a large amount of lime, and it must be purified by water to obtain Qingdai, which is time-consuming and labor-intensive. , and the content of indigo and indirubin in Qingdai processed by traditional methods is relatively low, and the product quality is not good, which affects the curative effect