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A method for extracting antioxidant phenolic acids from potato peel

A potato peel and oxidized phenolic acid technology, which is applied to the active ingredients of hydroxyl compounds, food science, etc., to achieve high content, good product quality, and avoid subsequent sterilization effects

Active Publication Date: 2017-07-07
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for the extraction of high-purity antioxidant polyphenols in potato peels, so as to overcome the defects and deficiencies in the existing technology of extracting active components of potato peels

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 150 g of crushed potato skins and grind to obtain 50-mesh granular powder. Put the potato peel powder in the extraction kettle, add 750mL of water as the solvent for extraction and washing, the temperature is 50°C, the pH of the solution is controlled by acetic acid to 3.5, stir; the time is 60 minutes, stop heating, filter, and retain the filter residue. Put the filtered residue powder after extraction and washing into a stainless steel extraction kettle, and use subcritical water as the medium for dynamic extraction. Extract for 30min. After the effluent is cooled, it passes through a chromatography column equipped with a macroporous resin. After the adsorption is completed, it is washed with 1 times the column volume of water, and then eluted with 3 times the column volume of 50% ethanol-water mixed solvent, and the eluate is collected. ; Concentrated and dried to obtain the phenolic acid mixture, adopting gallic acid as the standard substance to measure the t...

Embodiment 2

[0026]Weigh 250g of crushed potato skins, remove impurities, and pass through an 80-mesh sieve after grinding. Put the potato peel powder in an extraction kettle, add 2.5L of water as a solvent for extraction and washing, control the temperature at 50°C, control the pH of the solution to about 4.0 with acetic acid, stir; stop heating for 40 minutes, and filter. Put the washed filter residue powder into a stainless steel extraction kettle, heat the temperature of the subcritical water to 180°C, the pressure of the extraction kettle is 15MPa, and the flow rate is 8mL / min, and the subcritical water is used as the medium for dynamic extraction for 50 minutes. After the effluent is cooled, it passes through a chromatographic column equipped with a macroporous resin. After the adsorption is completed, it is washed with 1.5 times the column volume of water, and then eluted with 3 times the column volume of 40% ethanol-water mixed solvent, and the eluate is collected. ; Concentrated a...

Embodiment 3

[0028] Weigh 50g of crushed potato skins, remove impurities, grind and pass through an 80-mesh sieve. Put the potato peel powder in an extraction kettle, add 750mL of water as a solvent for extraction and washing, control the temperature at 60°C, control the pH of the solution to 4.5 with acetic acid, stir for 30 minutes, stop heating, and filter. Put the filter residue into a stainless steel extraction kettle, heat the temperature of the subcritical water to 160°C, the pressure of the extraction kettle is 12MPa, and the flow rate is 7.5mL / min. The subcritical water is used as the medium for dynamic extraction for 60 minutes. After the effluent is cooled, it passes through a chromatographic column equipped with a macroporous resin. After the adsorption is completed, it is washed with 2 times the column volume of water, and then eluted with 3 times the column volume of 50% ethanol-water mixed solvent, and the eluate is collected. Concentrated and dried to obtain a phenolic acid...

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Abstract

A disclosed method for extracting anti-oxidative phenolic acids from potato peel slag mainly comprises the following steps: (1) crushing; (2) employing a normal-pressure solvent water for extraction washing; (3) employing subcritical water to extract phenolic acids in potato peel slag; (4) employing macroporous adsorption resin for purification; and (5) performing concentrating, refrigeration or spray drying on the eluate, so as to obtain the high-purity anti-oxidative phenolic acid. The above phenolic acids are applicable to industries such as foodstuff ingredients, cosmetic and the like. The method fully utilizes the property characteristics of the water solvent at a subcritical state, helps to change wastes into valuables, has the characteristics of green technology, good product quality, wide adaptability and the like, and accords with requirements on green-foodstuff chemical engineering.

Description

technical field [0001] The invention belongs to the technical field of agricultural waste utilization, and in particular relates to a method for subcritical water extraction and macroporous resin purification of antioxidant phenolic acid substances in potato peels. Background technique [0002] As consumers become aware of the toxicity of chemically synthesized antioxidants, it is an inevitable trend in the food industry to find natural, low-toxic, and highly effective antioxidants. Studies have shown that plant polyphenols have special biological activities, such as inhibition of mutation, anti-oxidation, anti-tumor, prevention and treatment of cardiovascular and cerebrovascular diseases such as coronary heart disease and stroke, and antibacterial and other physiological functions, especially flavonoids and phenolic acids Compounds can be used as natural antioxidants in medicine, cosmetics, food industry and other fields. [0003] Potato is the fourth largest food crop in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K31/05A23L33/00
Inventor 房升左小博陈杰孟岳成
Owner ZHEJIANG GONGSHANG UNIVERSITY
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