Method for manufacturing purple corn anthocyanin

A manufacturing method and technology of purple corn, applied in the field of extracting anthocyanins, can solve problems such as waste of resources, achieve efficient extraction, simple operation process, and reduce degradation loss

Active Publication Date: 2007-09-19
BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Another technical problem to be solved by the present invention is to provide a simple, convenient and easy-to-operate process for the purple corn plants that are directly used as feed or discarded as waste in the prior art and cause resource waste. A method for efficiently extracting anthocyanins from plant stalks, seed coats, filaments, bracts, and cobs, so as to make full use of plant resources and increase the additional use value of purple corn plants

Method used

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  • Method for manufacturing purple corn anthocyanin

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Effect test

Embodiment 1

[0032] The cobs of purple corn plants rich in anthocyanins are used as raw materials, and are dried with hot air under the condition of avoiding light, and the drying temperature is 45°C. The particle size of the dried materials after crushing is 50 mesh; then the materials are subjected to enzymatic hydrolysis treatment, The amount of water is preferably soaked in the material. The selected enzyme preparation is commercially available cellulase. The amount of the enzyme preparation is about 0.2% of the weight of the dry material. Adjust the pH value of the enzymolysis system to about 3; after the enzymolysis is completed, continue to add water and ethanol to the material to prepare an extraction system. The extractant in this system is ethanol aqueous solution, and the ethanol volume percentage is controlled at about 40%, An appropriate amount of citric acid is added to maintain an acidic extraction environment. The total amount of citric acid added is about 0.2% of the extrac...

Embodiment 2

[0038] Using fresh purple corn bracts as raw materials, firstly carry out enzymatic hydrolysis treatment on the material (properly dried), wherein the enzyme preparation used is a mixture of commercially available cellulase and hemicellulase, and the addition amount is about 0.8% of the weight of the leaf material (based on the content of cellulase), the reaction time is 50 minutes, the temperature is 50° C., and the pH of the enzymolysis system is adjusted to 3.5 by using citric acid. Carry out leaching after enzymatic hydrolysis, extractant is the ethanol aqueous solution of ethanol volume content 50%, is added with the citric acid of about 1% of extractant weight in the leaching system to maintain the acidic environment of leaching system, the material and extractant The ratio (material-to-liquid ratio) is 1:15; during the leaching process, ultrasonic-assisted extraction is used, and the power density of the ultrasonic wave is 1.2W / cm 2 , each ultrasonic treatment time is a...

Embodiment 3

[0042] Corn seed coats rich in anthocyanins are used as raw materials, and the seed coats are collected by corn seeds through a peeling machine. First, the raw materials are subjected to enzymatic hydrolysis treatment, and the selected enzyme is a mixture of commercially available cellulase and hemicellulase , the addition ratio of the enzyme preparation is 2% of the weight of the corn seed coat raw material, the reaction time is 15 minutes, the temperature is 60° C., and the pH is adjusted to 5 by citric acid. Add ethanol to the material after enzymatic hydrolysis to form an ethanol aqueous solution with an ethanol volume content of about 80% as an extractant for extraction. The ratio of solid to liquid is about 1:10, and about 1% by weight of the extractant is added to the extraction system of citric acid (to maintain the pH4 of the extraction system). The extraction process uses ultrasonic-assisted extraction, and the power density of the ultrasonic wave is 1W / cm 2, each u...

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Abstract

The invention provides a preparing method of purple corn cyanidin, using purple corn plant as material, first hydrolysis of material by cellulase, regulating pH value by citric acid in the hydrolysis process; then leaching by adding water and / or alcohol, or alcohol water solution in acidic environment which maintaining by citric acid leaching system; separating the leached material and collecting extracting solution; condensing the extracting solution as required to get purple corn cyanidin extracting solution; and, controlling temperature lower than 70 DEG C in whole manufacture process. Adding beta-cyclodextrin or maltodextrin, spray drying to get microcapsule product containing purple corn cyanidin. By using the method of this invention, purple corn cyanidin has high extractability, and obtained products at least contain more than six kinds of anthocyanin or derivant components thereof.

Description

technical field [0001] The invention provides a method for producing purple corn anthocyanins, in particular to a method for extracting anthocyanins from materials such as purple corn plant stalks, bract leaves or cobs. Background technique [0002] Purple corn refers to the general term for corn crops whose grain color is black, purple, blue, and black. It is also called black corn and is a plant rich in anthocyanin. Anthocyanins are a class of water-soluble pigments widely present in plants, and are the coloring substances of plants, usually a mixture of various anthocyanins and their derivatives. For example, purple corn plants contain various anthocyanins and their derivatives such as cyanidin, geranium pigment, paeoniflorin, etc., and these anthocyanins and their derivatives all belong to anthocyanins. Since anthocyanins belong to flavonoid compounds, they have a strong antioxidant effect, can remove free radicals in the body, reduce the activity of oxidases, improve t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P17/06C12P19/60
CPCC08B37/0015C08L5/16
Inventor 赵晓燕马越
Owner BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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