Method for extracting cyanidin from purple common yam rhizome

A technology for yam and anthocyanin, which is applied in the field of extracting anthocyanin from purple yam, can solve the problems of unfavorable industrial production, long time consumption, cumbersomeness and the like, and achieve the effect of reducing harm to the human body

Inactive Publication Date: 2014-09-10
黄香利
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are mostly cumbersome, time-consuming, and consume a large amount of solvents, which is n

Method used

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  • Method for extracting cyanidin from purple common yam rhizome

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Embodiment 1

[0021] A method for extracting anthocyanins from purple yam, comprising the following steps:

[0022] Step 1. Wash the fresh purple Chinese yam and soak it in a soaking tank. Add a buffer solution of acetic acid and sodium acetate to the soaking tank. Control the pH of the soaking solution to 3.4, the temperature to 25°C, and the soaking time to 1 hour;

[0023] Step 2. Put the soaked purple Chinese yam into a drying oven. The temperature in the drying oven is 32°C, and the drying time is 15 minutes. After drying, use a crusher to crush it into powder at room temperature, and pass through a 50-mesh sieve. ;

[0024] Step 3, adding the purple yam powder and solvent into a high-speed homogenizer with a mass ratio of 1:30 for homogenate extraction. The solvent is subcritical water and ethanol with a volume ratio of 1:2 and a temperature of 150°C. The pressure is 10MPa, the extraction time is 3min, and the homogenization speed is 13000r / min;

[0025] Step 4. Adsorb the homogenat...

Embodiment 2

[0027] A method for extracting anthocyanins from purple yam, comprising the following steps:

[0028] Step 1. Wash the fresh purple Chinese yam and soak it in a soaking tank. Add a buffer solution of acetic acid and sodium acetate to the soaking tank. Control the pH of the soaking solution to 3.6, the temperature to 28°C, and the soaking time to 1.2 hours;

[0029] Step 2. Put the soaked purple Chinese yam into a drying oven. The temperature in the drying oven is 34°C, and the drying time is 17 minutes. After drying, use a crusher to crush it into powder at room temperature, and pass through a 55-mesh sieve. ;

[0030] Step 3, adding the purple yam powder and solvent into a high-speed homogenizer at a mass ratio of 1:40 for homogenate extraction. The solvent is subcritical water and ethanol at a volume ratio of 1:2, and the temperature is 180°C. The pressure is 11MPa, the extraction time is 5min, and the homogenization speed is 14000r / min;

[0031] Step 4. Adsorb the homogen...

Embodiment 3

[0033] A method for extracting anthocyanins from purple yam, comprising the following steps:

[0034] Step 1. Wash the fresh purple Chinese yam and soak it in a soaking tank. Add a buffer solution of acetic acid and sodium acetate to the soaking tank. Control the pH of the soaking solution to 3.8, the temperature to 30°C, and the soaking time to 1.5 hours;

[0035] Step 2. Put the soaked purple Chinese yam into a drying oven. The temperature in the drying oven is 36°C, and the drying time is 20 minutes. After drying, use a crusher to crush it into powder at room temperature, and pass through a 60-mesh sieve. ;

[0036] Step 3, adding purple Chinese yam powder and solvent into a high-speed homogenizer with a mass ratio of 1:45 to perform homogenate extraction, the solvent is subcritical water and ethanol with a volume ratio of 1:2, and the temperature is 200°C. The pressure is 12MPa, the extraction time is 8min, and the homogenization speed is 15000r / min;

[0037] Step 4. Ads...

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Abstract

The invention relates to the technical field of natural pigment extraction, particularly a method for extracting cyanidin from purple common yam rhizome, which comprises the following steps: cleaning fresh purple common yam rhizome, soaking in a soaking tank, and adding a buffer solution of acetic acid and sodium acetate into the soaking tank to control the pH value of the soaking solution at 3.4-3.8; putting the soaked purple common yam rhizome into a drying box, drying, and crushing into powder with a crusher at room temperature; adding the purple common yam rhizome powder and a solvent into a high-speed homogenizer, and carrying out homogenization and extraction, wherein the solvent is a mixture of subcritical water and ethanol in a volume ratio of 1:2, the temperature is 150-200 DEG C, and the pressure is 10-12 MPa; and adsorbing the homogenized solution through a macroporous adsorbent resin, eluting, concentrating under reduced pressure, drying, pulverizing, and screening to obtain the solid cyanidin product. The invention provides a safe, economic and effective method for extracting cyanidin, and maximally lowers the injury to the human body.

Description

technical field [0001] The invention relates to the technical field of natural pigment extraction, in particular to a method for extracting anthocyanins from purple yam. Background technique [0002] Purple yam medicine, also known as "purple ginseng", contains a lot of nutrients such as protein, polysaccharides and starch. It has the functions of nourishing the lungs and kidneys, strengthening the spleen and stopping diarrhea, and is delicious. Purple yam contains a large amount of purple anthocyanins, which is beneficial to the treatment of cardiovascular diseases, and has the effect of anti-oxidation and beauty. Regular consumption of purple yam medicine can not only increase the body's resistance, lower blood pressure, blood sugar, anti-aging and prolong life, but also benefit the spleen, lung, kidney, etc. king". [0003] Anthocyanins, also known as anthocyanins, are a class of water-soluble natural pigments widely present in plants in nature, and belong to flavonoid ...

Claims

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Application Information

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IPC IPC(8): C07D311/62C09B61/00
CPCC07D311/62
Inventor 黄香利
Owner 黄香利
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