Shanzhaye Tiquwu Hawthorn Leave Extract

Shanzhaye Tiquwu Hawthorn Leave Extract Shanzhaye Tiquwu Hawthorn Leave Extract This product is an extract made from the dried leaves of Crataegus pinnatifida Bge.var. major N.E.Br. or Crataegus pinnatifida Bge. [Preparation method] Take hawthorn leaves, crush them into coarse powder, add 50% ethanol to extract twice (55 ~ 60 ℃) for 2 hours each time, add 10 times the amount for the first time, add 8 times the amount for the second time, and filter , Combine the filtrate, recover ethanol until the filtrate has no alcohol smell, dilute with the same amount of water, add to the processed D101 macroporous adsorption resin, and elution with water and different concentrations of ethanol in turn, collect the corresponding eluate, and recover the ethanol , Concentrate to a clear paste with a relative density of about 1.10 (60 ℃), spray dry, and get it.

[Properties] This product is light brown to yellow-brown powder; it has a peculiar gas, bitter taste, and hygroscopicity.

[Identification] Take 5mg of this product, dissolve it with 2ml methanol, filter, and use the filtrate as the test solution. Take the vitexin rhamnoside reference substance and add methanol to make a solution containing 1 mg per 1 ml as the reference substance solution. According to the test of thin layer chromatography (Appendix VI B), draw 2 ~ 3 ml of the above two solutions and place them on the same silica gel GF 254 thin layer plate, using ethyl acetate-methanol-water (25:5:3) as Expand the developing agent, take it out, dry it, and inspect it under an ultraviolet light (254nm). In the chromatogram of the test substance, the fluorescent spots of the same color appear on the position corresponding to the chromatogram of the reference substance.