Method of extracting eucalyptus and bamboo wood flavonoid

An extraction method and technology of flavonoids, which is applied in the field of extraction of flavonoids, can solve the problems of little knowledge and achieve the effects of easy operation, good controllability, and increased added value

Inactive Publication Date: 2008-07-30
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the physiological functions of flavonoids have been extensively studied and considerabl

Method used

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Examples

Experimental program
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Example Embodiment

[0020] Example 1:

[0021] A method for extracting eucalyptus and bamboo flavonoids, the preparation steps comprising:

[0022] (1), using ethyl acetate solvent and ultrasonic wave to extract the extract from the bamboo slices, the extraction temperature is 100°C, then evaporate and recover the solvent at a temperature of 100°C and 0MPa vacuum to obtain the bamboo extract;

[0023] (2), dissolving the bamboo extract with methanol at 60° C. to obtain a methanol extract solution;

[0024] (3), adding pH to the methanol extract solution is a saturated solution of lead acetate water of 6.0, until no precipitation, filtering to obtain the filtrate, and then adding a saturated solution of lead acetate with a pH of 7.5 in the filtrate, adding alkaline The substance is sodium hydroxide, and the addition amount is 0.01% (mass ratio), until there is no precipitate, the precipitate is obtained by filtration, and then the precipitate is dissolved with ethanol to obtain an ethanol solutio...

Example Embodiment

[0027] Example 2:

[0028] A method for extracting eucalyptus and bamboo flavonoids, the preparation steps comprising:

[0029] (1), use acetic acid solvent, adopt microwave to extract extract from bamboo shavings, extraction temperature is 0 ℃, then evaporate at 5 ℃ temperature, 0MPa vacuum, recover solvent, obtain bamboo wood extract;

[0030] (2), dissolving the bamboo extract with methanol at 10°C to obtain a methanol extract solution;

[0031] (3), adding pH to the methanol extract solution is a saturated solution of lead acetate water of 7.5, until no precipitation, filtering to obtain the filtrate, and then adding a saturated solution of lead acetate with a pH of 7.5 in the filtrate, adding alkaline The substance is potassium hydroxide, and the addition amount is 0.01% (mass ratio), until there is no precipitate, the precipitate is obtained by filtration, and then the precipitate is dissolved with ethanol to obtain an ethanol solution;

[0032] (4), add potassium sulf...

Example Embodiment

[0034] Example 3:

[0035] A method for extracting eucalyptus and bamboo flavonoids, the preparation steps comprising:

[0036] (1), using ethanol solvent to extract the extract from bamboo fiber, the extraction temperature is 100°C, then evaporate and recover the solvent at 100°C temperature and 0.99MPa vacuum to obtain the bamboo extract;

[0037] (2), dissolving the bamboo extract with methanol at 60° C. to obtain a methanol extract solution;

[0038] (3), adding pH in the methanol extract solution is the lead acetate water-saturated solution between 6.5, until no precipitation, filters to obtain the filtrate, then adds the lead acetate water-saturated solution between 6.0 in the filtrate , adding an alkaline substance is potassium carbonate, and the addition amount is 5% (mass ratio), until no precipitation is obtained, the precipitation is obtained by filtration, and then the precipitation is dissolved with ethanol to obtain an ethanol solution;

[0039] (4), add sodium...

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Abstract

The invention discloses an extraction method for extracting flavone from eucalyptus and bamboo which comprises the steps: (1) extractive is extracted from the eucalyptus and the bamboo by a solvent method and solvent is reclaimed by evaporating, by means of which the extractive of the eucalyptus and the bamboo is obtained; (2) the extractive of the eucalyptus and the bamboo is dissolved in methanol under 0-60 DEG C to obtain the extractive methanol solution; (3) neutral lead acetate solution is added in the extractive methanol solution and the mixed liquid is filtered to obtain filtered solution; then alkaline lead acetate solution is added in the filtrate and the mixed liquid is filtered to obtain a precipitate which then is dissolved in ethanol so as to obtain the ethanol solution; (4) sulfate or potassium sulfate or the mixture of the sodium sulfate and the potassium sulfate is added in the ethanol solution and the mixed liquid is filtered; the filtrate is evaporated in vacuum under 5-100 DEG C and 0-0.99MPa and the solvent is reclaimed to obtain the solid matter; (5) the solid matter is dissolved in the ethanol solution and then the filtrate is obtained; the final obtained solid matter evaporated in vacuum under 5-100 DEG C and 0-0.99MPa with the solvent reclaimed is the flavone of the eucalyptus and the bamboo. The extraction method has simple process, easy operation, good controllability and low cost and is suitable for industrialization, thus having broad application prospect.

Description

technical field [0001] The invention relates to an extraction method for preparing flavonoids from eucalyptus and bamboo. Background technique [0002] Since epidemiological studies reported that there was a negative correlation between flavonoid intake and mortality caused by myocardial infarction and coronary heart disease, research on the biological activity of plant-derived flavonoid compounds has suddenly become a hot research focus. In the past ten years, the literature reports on flavonoids have increased almost exponentially, and there are currently thousands of relevant literatures per year. [0003] A large number of studies have shown that flavonoids not only have antibacterial, antiviral, anti-inflammatory, anti-allergic and vasodilation effects, but also inhibit lipid peroxidation (LPO), platelet aggregation and a large number of enzymes (including cyclooxygenase and lipooxygenase). Synthase) activity, and improve capillary permeability and fragility. Most of ...

Claims

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Application Information

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IPC IPC(8): A61K36/899A61P9/00A61P31/12A61P29/00
Inventor 吴义强彭万喜宋烨
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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