Process for extracting polysaccharide from astragalus root using microwave

The technology of astragalus polysaccharide and microwave is applied in the field of extracting astragalus polysaccharide from astragalus by using microwave technology, which can solve the problems of high content or extraction rate of astragalus polysaccharide, large energy, and complexity, and achieves high extraction rate, reduced energy consumption, and simple steps. Effect

Inactive Publication Date: 2006-12-20
SHANGHAI INST OF PHARMA IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems that there are too many operating steps in the above method, too complicated and too much power to cause energy waste, we have improved the extraction method to simplify the microwave extraction steps without causing energy waste, and the obtained Radix Astragali High polysaccharide content or extraction rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Precisely weigh 10g of astragalus powder, put it in a microwave extraction equipment, add water 114ml for the first time, and then add water 80ml each time, control the temperature at 70°C, and extract 4 times in total, 10min each time. Collect the extract, filter with gauze and absorbent cotton, collect the filtrate, concentrate to 10ml, add 50ml of ethanol to stir, centrifuge, add 150ml of water to the precipitate, stir to dissolve, centrifuge, take the supernatant and concentrate to 10ml, add 50ml of ethanol to stir, centrifuge, Dried to obtain 1.4 g of astragalus polysaccharide with a purity of 87.14%, with a yield of 14%.

Embodiment 2

[0024] Accurately weigh 5g of astragalus powder, put it in a microwave extraction equipment, add 50ml of dilute hydrochloric acid solution for the first time, and then add 25ml of dilute hydrochloric acid solution each time, control the pH to 4, and control the temperature to 40°C, extract 8 times in total, 5min each time . Collect the extract, filter with gauze and absorbent cotton, collect the filtrate, concentrate to 10ml, add 50ml of ethanol to stir, centrifuge, add 150ml of water to the precipitate, stir to dissolve, centrifuge, take the supernatant and concentrate to 10ml, add 50ml of ethanol to stir, centrifuge, Dried to obtain 1.02 g of astragalus polysaccharide with a purity of 60.23%, and a yield of 20.4%.

Embodiment 3

[0026] Accurately weigh 20 g of astragalus powder, put it in a microwave extraction equipment, add 500 ml of ammonia solution, control the pH to 8, and control the temperature at 100 ° C, and extract once for 30 min. Collect the extract, filter with gauze and absorbent cotton, collect the filtrate, concentrate to 13ml, add 40ml of ethanol to stir, centrifuge, add 240ml of water to the precipitate, stir to dissolve it, centrifuge, take the supernatant and concentrate to 13ml, add 40ml of ethanol to stir, centrifuge, Dried to obtain 3.17 g of astragalus polysaccharides with a purity of 75.56%, and a yield of 15.85%.

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PUM

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Abstract

This invention discloses a method for extracting Radix Astragali polysaccharide by microwave from Radix Astragali, comprising: 1) extract the Radix Astragali in water using microwave at constant temperature of 40-100Deg C; 2) collect the extracting liquid, filtrate, concentrate and precipitate by adding ethanol; 3) centrifuge and dry the sediment so as to obtain the Radix Astragali polysaccharide. This invention can control the microwave extraction at certain constant temperature continuously without break between each extraction, and is characterized of high selectivity, simple procedures, low consumption of labor and energy, high yield, and high purity.

Description

technical field [0001] The invention relates to a microwave extraction method of traditional Chinese medicine, in particular to a method for extracting astragalus polysaccharide from astragalus by adopting microwave technology. Background technique [0002] Radix Astragalus (Radix Astragalus) is the dried root of Astragalus membranaceus (Fisch) Bge or Astragalus membranaceus (Fisch) Bge.Var.mongholicus (Bge) Hsiao) of the leguminous plant. Sweet in taste, slightly warm in nature, invigorating qi and solidifying the surface, diuresis and treating sores. Modern pharmacological studies have shown that astragalus polysaccharide is one of the main components of astragalus, which has a wide range of pharmacological effects such as improving immunity, anti-tumor, anti-radiation damage, antibacterial and anti-virus, regulating blood sugar, and anti-aging. [0003] The microwave extraction method of traditional Chinese medicine does not emit toxic pollutants during the process; in a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/00
Inventor 杨义芳许海燕
Owner SHANGHAI INST OF PHARMA IND CO LTD
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