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Colorful potato anthocyanin extraction method

A technology for colored potatoes and extraction methods, applied in chemical instruments and methods, organic chemistry, azo dyes, etc., can solve the problems of low utilization rate of anthocyanins, reduce degradation, improve extraction rate, and achieve economical and high-value utilization. Effect

Pending Publication Date: 2022-07-01
YUNNAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the present invention provides a method for extracting anthocyanins from colored potatoes, aiming at solving the problem of low utilization rate of anthocyanins in colored potatoes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for extracting color potato anthocyanins, comprising the following steps:

[0032] 1. Fix it. Wash the tubers of fresh colored potatoes (the variety is Jianchuanhong or Zhuanxinwu), cut them into thin slices, and steam at 100°C for about 5 minutes. Although the heat treatment may degrade a small part of anthocyanins, it can prevent most of the flower colors. The glycosides are not degraded into tan or colorless substances by polyphenol oxidase (PPO), peroxidase and glycosidase (anthocyanidase), thereby losing their bright color.

[0033] 2. Extract. Use glacial acetic acid methanol solution (1:1, V:V, pH 1.0-3.0) to immerse the potato slices after fixing for 24 hours in an airtight and dark place, pour out the crude extract, and then use the same concentration of glacial acetic acid methanol solution to extract two parts. secondary residue.

[0034] 3. Precipitation and filtration. The crude extract is placed at room temperature on a high place or on a tabl...

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PUM

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Abstract

The invention discloses a method for extracting anthocyanin from colored potatoes. The method comprises the steps of fixation, extraction, precipitation, filtration and concentration. The anthocyanin can be structurally converted along with the change of pH and the stability of the anthocyanin is easily influenced by temperature, so that the anthocyanin can be converted into a colorless chalcone structure by heating, and in addition, the anthocyanin is unstable under light, so that the anthocyanin can be used for reducing the degradation of the anthocyanin. A glacial acetic acid methanol solution is used as an extraction solvent and is subjected to vacuum concentration in a dark place at 40 DEG C; purifying the crude anthocyanin extract by adopting an XAD-7 or AB-8 macroporous resin; and performing vacuum freeze drying to obtain anthocyanin powder. According to the method for extracting the anthocyanin of the colored potatoes, high-valued utilization of potato resources can be safely, simply, conveniently and economically achieved, degradation of the anthocyanin can be reduced through scientific and reasonable extraction and concentration means, and the extraction rate of the anthocyanin can be increased through improvement of the extraction process; the adsorption rate and the desorption rate of the macroporous adsorption resin on the anthocyanin of the colored potatoes are remarkably improved, and the macroporous adsorption resin is suitable for industrial production and application.

Description

technical field [0001] The invention relates to the technical field of plant extraction, in particular to a method for extracting color potato anthocyanins. Background technique [0002] Colored potatoes have become a research hotspot due to their attractive color, delicate taste and richness of anthocyanins. Anthocyanin is a water-soluble natural pigment, which belongs to flavonoids, and has the functions of anti-oxidation, enhancing human immunity, preventing cardiovascular diseases, and preventing and fighting cancer. Anthocyanins are unstable and are susceptible to changes in color and properties due to pH, temperature, light, enzymes, etc. Colored potato anthocyanins are mainly acylated anthocyanins, which can maintain a good quality during processing, storage and application. It has high stability, high yield, low production cost and strong adaptability to the environment, and can be used as a new source of natural pigments and antioxidants. However, the development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H17/065C07H1/08C09B61/00C09B67/54
CPCC07H17/065C07H1/08C09B61/00C09B67/0096
Inventor 肖继坪郭宗明王琼郭华春
Owner YUNNAN AGRICULTURAL UNIVERSITY