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A kind of preparation method of feijoa leaf extract

The technology of extract and fermented fruit is applied in the field of preparation of natural plant extracts, which can solve the problems of high toxicity of methanol, high equipment requirements and high production cost, and achieve the effects of good commercial effect, high safety performance and low cost.

Inactive Publication Date: 2017-06-13
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process uses ultrasonic extraction, which requires high equipment and complicated operation, and methanol is highly toxic and the production cost is high.
In the prior art, there are no other reports on the extraction technology of total flavonoids from feijoa leaves

Method used

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  • A kind of preparation method of feijoa leaf extract
  • A kind of preparation method of feijoa leaf extract
  • A kind of preparation method of feijoa leaf extract

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of feijoa leaf extract, the steps are: take 50g of feijoa leaf powder, add 500mL of water, heat and reflux extraction at a boiling point temperature of 90°C and corresponding pressure, repeat the extraction twice, and heat and reflux each time 4h. Suction filtration, the filter residue was washed with water, the filtrate and washing liquid were combined, and the solvent water was removed and recovered by distillation under reduced pressure. The residue, namely the concentrated solution, was spray-dried to obtain 5.51 g of feijoa leaf extract powder. The total flavonoid content is 58.0%.

Embodiment 2

[0034] A preparation method of feijoa leaf extract, the steps are: take 12Kg of feijoa leaf powder, add 120L of water, heat and reflux extraction at a boiling point temperature of 90°C and corresponding pressure, repeat the extraction 3 times, and heat and reflux each time 2h. Suction filtration, the filter residue was washed with water, the filtrate and washing liquid were combined, and the solvent water was removed and recovered by distillation under reduced pressure. The residue, namely the concentrated solution, was spray-dried to obtain 1230 g of powder of feijoa leaf extract, and the total flavonoids in the leaf extract The content is 56.7%.

Embodiment 3

[0036] Determination of total flavonoids content in feijoa leaf extract:

[0037] Measuring conditions: S54 UV-Vis spectrophotometer (Shanghai Prism Technology Co., Ltd.); rutin reference substance (provided by China Institute for the Control of Pharmaceutical and Biological Products), the maximum absorption wavelength of rutin: 510nm.

[0038] Drawing of standard curve: Weigh 25mg of rutin reference substance dried at 120°C to constant weight, put it in a 50mL measuring bottle, add an appropriate amount of ethanol, sonicate to dissolve, let cool, add ethanol to the mark, and shake well. Measure 20mL, put it in a 50mL volumetric flask, add water to the mark, shake well, and make a solution containing 0.2mg of anhydrous rutin per 1mL. Measure 1mL, 2mL, 3mL, 4mL, 5mL, 6mL of the reference substance solution, put them in 25mL volumetric flasks respectively, add water to 6mL each, add 1mL of 5% sodium nitrite solution, shake well, let stand for 6 minutes, add 10% aluminum nitrate S...

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Abstract

The invention discloses a method for preparing a feijoa leaf extract. The method is characterized by comprising the following steps: baking fresh feijoa leaves, and grinding; putting leaf powder in reflux extraction equipment, weighing water in a mass ratio of leaf powder to water being 1 to (3-40), adding into reflux extraction or immersing equipment, and heating and refluxing or immersing for 1-5 hours to obtain a mixed material; carrying out suction filtering on the mixed material, washing the filtered residues by water, and combining filtrate and cleaning liquid; removing and recovering solvent, namely water by a decompressed distillation method, and drying the residues, namely extract concentrate to obtain the feijoa leaf extract. The preparation method is simple and strong in operability, is suitable for large-scale industrial production, has the advantages of low production cost, environmental friendliness and no pollution, and accords with green chemical process requirements; the prepared feijoa leaf extract can be used as medicines, foods, health products or additives thereof.

Description

technical field [0001] The invention belongs to the preparation of natural plant extracts, and relates to a preparation method of feijoa leaf extract. The feijoa leaf extract obtained by the invention is suitable for use as medicine, food, health product or additive of medicine, food and health product. Background technique [0002] Feijoa (Feijoa sellowiana Berg.), also known as pineapple guava, Brazilian guava, fig guava, is an evergreen shrub or small tree of the genus Feijoa in the family Myrtaceae. Feijoa originated in Brazil and Uruguay in South America. Because of its high research and utilization value, countries have attached great importance to the introduction and breeding of Feijoa for many years. At present, research, development and utilization of feijoa fruit are mainly carried out at home and abroad. Extracts from the feijoa fruit (along with many other fruits) can be taken as a dietary supplement to relieve inflammation and pain. The lipids of feijoa frui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K36/61A23L33/105A61P39/06A61K127/00A23L33/10
CPCA23V2002/00A61K36/61A61K2236/15A61K2236/331A61K2236/51A23V2200/15A23V2200/30A23V2250/21
Inventor 袁小红马泽刚王丹刘卓徐文学张登奎
Owner SOUTHWEAT UNIV OF SCI & TECH
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