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Method for extracting anthocyanin from purple potatoes

A kind of technology of purple potato and anthocyanin

Inactive Publication Date: 2010-10-27
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Apparently, although the above-mentioned method for extracting potato anthocyanins and separating and purifying plant-derived anthocyanins can prepare potato anthocyanin extracts with a certain degree of purity and yield, due to the limitation of technical means and the use of a large amount of toxic organic Solvents or chemical preparations make the product obviously have defects such as poor safety or low purity and yield, small production volume, easy moisture absorption, ineffective efficacy, and insufficient product quality and market competitiveness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 1000 grams of fresh purple potato shades, chop and beat, use acidified ethanol with a volume concentration of 80% and adjust the pH value to 2 with citric acid, and extract at 50°C for 80 minutes at a ratio of 1 kg of purple potato pulp plus 20 liters of acidified ethanol , the obtained crude filtrate was passed through 200-mesh nylon cloth, then centrifuged and clarified at 4000 rpm for 10 minutes, and the clarified liquid was taken; the clarified liquid was concentrated at -0.05~-0.09MPa at 42°C, and the ethanol solvent was recovered and vacuum Freeze-dry to obtain 66.67 grams of purple potato anthocyanin crude extract. The extraction yield of anthocyanin measured by pH differential method is 0.068% of fresh purple potato raw material quality, and the purity of anthocyanin in the crude extract is 1.02%.

[0022]Dissolve the crude anthocyanin extract in the ratio of 1 gram of the above crude anthocyanin extract to 10 ml of water, then at room temperature, load the ...

example 2

[0024] Shade 1000 grams of fresh purple potatoes, chop and beat them, then use acidified ethanol with a volume concentration of 60% and adjust the pH value to 3 with citric acid, and extract at 30°C according to the ratio of 1 kg of fresh purple potato pulp plus 10 liters of acidified ethanol After 120 minutes, extract the crude filtrate and pass it through 200-mesh nylon cloth, then use a centrifuge to clarify by centrifugation at 5000 rpm for 5 minutes, and take the clarified liquid; concentrate the clarified liquid at -0.05~-0.09MPa, 40°C, and recover the ethanol solvent After vacuum freeze-drying, 64.63 grams of purple potato anthocyanin crude extracts were obtained. The extraction yield of anthocyanins measured by the pH differential method was 0.053% of the quality of fresh purple potato raw materials, and the purity of anthocyanins in the crude extract was 0.82%. .

[0025] Dissolve the crude anthocyanin extract in a ratio of 2 grams of the above-mentioned crude extract...

example 3

[0027] Shade 1000 grams of fresh purple potatoes, chop and beat them, then use acidified ethanol with a volume concentration of 95% and adjust the pH value to 1 with citric acid, and extract at 70°C at the ratio of 1 kg of fresh purple potato pulp to 30 liters of acidified ethanol After 60 minutes, extract the crude filtrate and pass it through 200-mesh nylon cloth, then use a centrifuge to clarify by centrifugation at 3000 rpm for 15 minutes, and take the clarified liquid; concentrate the clarified liquid at -0.05~-0.09MPa, 45°C, and recover the ethanol solvent After vacuum freeze-drying, 62.77 grams of purple potato anthocyanin crude extract were obtained. The extraction yield of anthocyanin measured by pH differential method was 0.059% of fresh purple potato raw material quality, and the purity of anthocyanin in the crude extract was 0.94%. .

[0028] Dissolve the crude anthocyanin extract in the ratio of 3 grams of the above-mentioned crude extract of anthocyanin plus 30 m...

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Abstract

The invention relates to a method for extracting anthocyanin from purple potatoes, which comprises the following steps of: safely and innocuously extracting anthocyanin crude extract with citric acid acidified ethanol from purple potatoes, and separating and purifying purple potato anthocyanin with AB-8 macropore adsorbent resin. With the method, anthocyanin as a main active ingredient in purple potatoes is extracted, separated and purified by adopting a natural product chemistry and Chinese traditional medicine modern production technology and made into purple potato anthocyanin extract of which the purity is 10-15%. The invention realizes high-ratio utilization of potato resources and industrial production of series products safely, effectively, simply, reasonably and economically and sufficiently embodies the idea of green chemical production.

Description

Technical field: [0001] The invention relates to a green chemical technology for extracting, separating and purifying physiologically active components in horticultural plants, especially a green extraction using citric acid to acidify ethanol and using AB-8 macroporous adsorption resin to separate and purify purple potato anthocyanins , and separation and purification methods. Background technique: [0002] Anthocyanins are flavonoid substances produced in the process of plant secondary metabolism. They have various physiological functions such as anti-oxidation, anti-aging, and prevention of vascular sclerosis. They can be used as natural raw materials in the fields of food, medicine, and cosmetics. Since the 1950s, with the in-depth understanding of the safety of synthetic anthocyanins, many countries have greatly reduced or even completely prohibited the use of synthetic anthocyanins in the fields of food, medicine and cosmetics, making natural anthocyanins the current n...

Claims

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Application Information

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IPC IPC(8): C07D311/62
Inventor 肖文军刘仲华龚志华
Owner HUNAN AGRICULTURAL UNIV
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