Method for extracting flavone from bamboo leaves

Abstract

The invention discloses a method for extracting flavone from bamboo leaves. The method comprises the following steps of: A, placing the bamboo leaves into a kettle, stewing the bamboo leaves by heating the kettle, turning off a heating device, cooling, and leaching dissolving-out substances from the bamboo leaves; B, allowing solution in the reaction kettle to pass through a filtering plate at the bottom of the reaction kettle to remove dregs and then pass through a filter with multifilament filter cloth to enter a settling tank; C, standing filtrate after filtering until the filtrate is clear and transparent; D, performing acid and alkali treatment on a macroporous resin NKA-9 polar resin, washing the resin with deionized water until the resin does not comprise ethanol, and placing the resin into a column; E, placing the clear and transparent filtrate into the column with the resin and stopping when the weight ratio of the resin to the filtrate is reached; F, washing with the deionized water until effluent liquid of the column is colorless, eluting the column with edible ethanol, and recovering the ethanol; and G, performing spray drying on the recovered solution without the ethanol in a spray tower to obtain total flavone. The method is practicable, easy and convenient to operate and low in cost. By the method, the flavone can be efficiently separated from the bamboo leaves and the effect is good. The flavone content is over 30 to 50 percent.

Description

technical field [0001] The invention relates to the technical fields of food additives, medicine and health care products, and more specifically relates to a method for extracting flavonoids from bamboo leaves. Biological functions such as cerebrovascular, prevention and treatment of senile diseases, etc., are widely used. Background technique [0002] Bamboo leaf flavonoids are the main active ingredients in bamboo leaf extracts, which can remove active oxygen free radicals in the human body, prevent biofilm lipids from being oxidized by superoxide free radicals and hydroxyl free radicals, prevent vascular sclerosis, improve brain tissue nutrition, and improve Cardiovascular and brain nervous system functions, anti-cancer, anti-aging and other important physiological and pharmacological effects. The active ingredients of bamboo leaf flavonoids are mainly flavonoid glycosides and coumarin lactones, which can significantly reduce the blood triglyceride and blood total choles...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many research reports on the extraction and purification methods of bamboo leaf flavonoids, most of which are extracted with different concentrations of ethanol. We have passed a large number of experiments and tests Analysis shows that the content of flavonoids extracted with 50%~60% alcohol and water is basically the same, and the ethanol extraction greatly destroys the original fragrance of bamboo leaves.