Extraction method of bamboo leaf flavonoids

A technology of bamboo leaf flavonoids and extraction methods, which is applied in the direction of pharmaceutical formulas, medical preparations containing active ingredients, plant raw materials, etc., can solve the problems of low and unsatisfactory bamboo leaf brass yields, and reduce the final yield of flavonoids , Reduce energy consumption, high yield effect

Inactive Publication Date: 2021-06-18
GUANGXI NORMAL UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The extraction process of the bamboo leaf brass conventionally used in the prior art generally comprises solvent method, ultrasonic extraction method and microwave extraction etc., but than above-mentioned method extraction gained bamboo leaf brass productive rate is lower, can't satisfy people's requirement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for extracting bamboo leaf flavonoids, comprising the steps of:

[0022] Step 1, get fresh bamboo leaves to dry and pulverize to obtain dry material;

[0023] Step 2, put the dry material into the ethanol aqueous solution and mix evenly, then put it into the first extraction tank for heating and extraction, the extraction time is 2 to 3 hours; then filter to obtain the primary extract and primary filter residue;

[0024] Step 3: Add the primary filter residue into the ethanol aqueous solution and mix evenly, then put it into the second extraction tank for heating and extraction; then filter to obtain the secondary extract and the secondary filter residue;

[0025] Step 4, putting the primary extract and the secondary extract together into a concentration tank for heating and concentration to obtain a concentrate;

[0026] Step 5, centrifuging the concentrated solution and then purifying it with a macroporous adsorption resin, and finally vacuum freeze-drying t...

Embodiment 2

[0031] In this embodiment, the difference from Embodiment 1 is:

[0032] The ratio of the dry material to the aqueous ethanol solution in the step 2 is 230:1000 by weight; the extraction time in the step 2 is 2.5 hours;

[0033] The ratio of the primary filter residue to the aqueous ethanol solution in step 3 is 230:800 by weight; the extraction time in step 3 is 3 hours.

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Abstract

The invention discloses an extraction method of bamboo leaf flavonoids. The extraction method comprises the following steps: 1, subjecting fresh bamboo leaves to airing and crushing to obtain a dry material; 2, putting the dry material into a first extraction tank to carry out heating extraction; carrying out filtering to obtain a primary extracting solution and primary filter residues; 3; adding the primary filter residues into a second extraction tank to carrying out heating extraction; carrying out filtering to obtain a secondary extracting solution and secondary filter residues; 4, putting the primary extracting solution and the secondary extracting solution into a concentration tank together, and carrying out heating and concentrating, thereby obtaining a concentrated solution; and 5, carrying out centrifugal separation on the concentrated solution, carrying out purifying by using macroporous adsorbent resins, and finally carrying out vacuum freeze drying, thereby obtaining the bamboo leaf flavonoids; wherein steam generated in the concentration tank in the step 4 is introduced into the second extraction tank, the steam generated in the second extraction tank is introduced into the first extraction tank, and the steam generated in the first extraction tank flows back into the first extraction tank after passing through a reflux condensation device. According to the invention, the extraction method is simple, high in yield and low in energy consumption.

Description

technical field [0001] The invention relates to the technical field of plant extraction, in particular to a method for extracting bamboo leaf flavonoids. Background technique [0002] Flavonoids have a wide range of pharmacological activities, are widely distributed, and are of various types. They are an important class of compounds in natural products. Bamboo leaf flavonoids are one of the main active ingredients of bamboo leaf extract, and the content in bamboo leaves accounts for 1-2%. Mainly, at the same time, it also contains flavonoids such as luteolin and apigenin. Compared with oxypreflavone, bamboo leaf flavonoid has a stable structure, is not easy to degrade, and has strong food safety. Because of its strong ability to scavenge free radicals, it has good anti-inflammatory, antibacterial, blood fat-lowering, anti-radiation, anti-cancer, anti-aging, improving cardiovascular system and brain nervous system functions. Therefore, it has broad market prospects in the ...

Claims

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Application Information

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IPC IPC(8): A61K36/899A61K127/00
CPCA61K36/899A61K2236/333A61K2236/39A61K2236/51A61K2236/55
Inventor谢济运蓝峻峰唐森
OwnerGUANGXI NORMAL UNIV OF SCI & TECH