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Method for preparing microcapsules based on alfalfa flower anthocyanin

An alfalfa technology and a production method are applied in the directions of forming of food, function of food ingredients, color of food ingredients, etc., can solve problems such as application limitation of anthocyanins, influence on the stability of anthocyanins, etc., and achieve high quality and improved yield , mild conditions

Pending Publication Date: 2021-06-11
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to reports, conditions such as temperature and light affect the stability of anthocyanins, resulting in limitations in the application of anthocyanins

Method used

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  • Method for preparing microcapsules based on alfalfa flower anthocyanin
  • Method for preparing microcapsules based on alfalfa flower anthocyanin
  • Method for preparing microcapsules based on alfalfa flower anthocyanin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Pick fresh alfalfa flowers, remove stems, vacuum freeze-dry at -60°C for 32 hours, crush through a 40-mesh sieve to obtain alfalfa flower powder; accurately weigh alfalfa flower powder, and adjust the liquid-to-material ratio to 31mL / g Add it to ethanol aqueous solution with a volume concentration of 60%, extract at 65°C for 25 minutes under the assistance of 250W ultrasonic power, adjust the pH of the extract to 1.5 with hydrochloric acid, centrifuge at 8000r / min at 4°C for 10min, and vacuum filter the supernatant to dry. Obtain alfalfa flower anthocyanins with a yield of 1.58mg / g.

[0021] 2. Dissolve 1.0 g of anthocyanins obtained in step 1 in 20 mL of distilled water to prepare a 0.05 g / mL aqueous anthocyanin solution; use a mixture of maltodextrin and xanthan gum at a mass ratio of 30:1 as the solute to prepare a mass concentration A 5% aqueous solution is used as the wall material solution; 20 mL of anthocyanin aqueous solution and 80 mL of the wall material so...

Embodiment 2

[0023] 1. Pick fresh alfalfa flowers, remove stems, vacuum freeze-dry at -60°C for 32 hours, crush through a 40-mesh sieve to obtain alfalfa flower powder; accurately weigh alfalfa flower powder, and use a liquid-to-solid ratio of 35mL / g Add it to ethanol aqueous solution with a volume concentration of 70%, extract at 70°C for 30 minutes with the help of ultrasonic power of 300W, adjust the pH of the extract to 1.5 with hydrochloric acid, centrifuge at 8000r / min at 4°C for 10min, and dry the supernatant by vacuum suction. Obtain alfalfa flower anthocyanins.

[0024] 2. Dissolve 1.0 g of anthocyanins obtained in step 1 in 20 mL of distilled water to prepare a 0.05 g / mL aqueous anthocyanin solution; use a mixture of maltodextrin and xanthan gum at a mass ratio of 25:1 as the solute to prepare a mass concentration A 5% aqueous solution is used as the wall material solution; 20 mL of anthocyanin aqueous solution and 80 mL of the wall material solution are mixed, stirred, and freez...

Embodiment 3

[0026] 1. Pick fresh alfalfa flowers, remove stems, vacuum freeze-dry at -60°C for 48 hours, crush through a 60-mesh sieve to obtain alfalfa flower powder; accurately weigh alfalfa flower powder, and use a liquid-to-material ratio of 40mL / g Add it to ethanol aqueous solution with a volume concentration of 50%, extract at 60°C for 25 minutes with the help of ultrasonic power of 250W, adjust the pH of the extract to 1.5 with hydrochloric acid, centrifuge at 8000r / min at 4°C for 10min, and dry the supernatant by vacuum suction. Obtain alfalfa flower anthocyanins.

[0027] 2. Dissolve 1.0 g of anthocyanins obtained in step 1 in 20 mL of distilled water to prepare a 0.05 g / mL aqueous anthocyanin solution; use a mixture of maltodextrin and xanthan gum at a mass ratio of 30:1 as the solute to prepare a mass concentration A 5% aqueous solution is used as the wall material solution; 20 mL of anthocyanin aqueous solution and 100 mL of the wall material solution are mixed, stirred, and f...

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Abstract

The invention discloses a method for preparing microcapsules based on alfalfa flower anthocyanin, and the method for extracting the alfalfa flower anthocyanin comprises the following steps: taking fresh alfalfa flowers, conducting freeze-drying at -60 to -48 DEG C, conducting crushing and sieving, conducting extracting for 15-35 minutes at 55-75 DEG C by using an ethanol aqueous solution with the volume concentration of 40-80% as an extracting solution according to the liquid-material ratio of 20-40mL / g and the assistance of 200-400W ultrasonic waves, adjusting the pH value of the extract to 1.5-2 by hydrochloric acid, conducting centrifuging at low temperature and high speed, and performing vacuum suction filtration and drying on supernate to obtain anthocyanin; and dissolving the anthocyanin in distilled water according to the material-liquid ratio of 0.04-0.06 g / mL, with an aqueous solution of maltodextrin and xanthan gum in the mass ratio of (10-30):1 as a wall material solvent, mixing a formed anthocyanin solution and a formed solution of maltodextrin and xanthan gum according to a mixing volume ratio of 1:(4-5), and conducting stirring and freeze-drying to obtain the microcapsules. The anthocyanin extraction method is simple, mild in condition and easy to operate, and the prepared microcapsules are excellent in quality, stable in performance, long in shelf life and suitable for expanded production.

Description

technical field [0001] The invention belongs to the field of food production, and in particular relates to a method for producing microcapsules based on alfalfa flower anthocyanins. Background technique [0002] Alfalfa is native to Asia, and now it is widely planted all over the world. It is the largest pasture grass in the world. Alfalfa is a perennial high-quality legume forage crop with high yield, good quality and wide applicability. And other excellent characteristics, known as the "King of Forage". It is planted in a large area in the western, central and northern regions of my country and is rich in resources. Alfalfa flowers are rich in anthocyanins. Anthocyanin is a compound formed by connecting anthocyanin and sugar with glycosidic bonds. It mainly exists in the fruits, flowers, stems, leaves and other parts of plants. It can give plants brilliant colors such as red, purple and blue. It is a natural of water-soluble pigments. In recent years, extensive researc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L5/43A23L33/105A23P10/30A23L3/00
CPCA23L5/43A23L33/105A23P10/30A23L3/00A23V2002/00A23V2200/04A23V2200/30A23V2250/21A23V2250/5086A23V2250/5114A23V2300/14A23V2300/48
Inventor 张有林张润光武治兴刘阳钟迪颖
Owner SHAANXI NORMAL UNIV
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