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Method for preprocessing Asiatic wormwood to preserve color in combination with quick-freezing and unfreezing for keeping quality

A technology of ultrasonic quick freezing and pretreatment, which is applied in the fields of freezing/refrigerating preservation of fruits/vegetables, food preservation, and fruit and vegetable preservation. problems, to achieve the effect of reduced loss, reduced freezing period, and low cost

Inactive Publication Date: 2013-01-02
JIANGNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Although the research in the above literature has discussed some basic properties and color protection methods of wormwood pigments, there is no systematic and targeted research on the processing of wormwood, and none of them involves the ultrasonic freezing and color protection of wormwood. Thawed Research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: The process of pretreatment color protection combined with intermediate frequency ultrasonic quick freezing and thawing wormwood pulp

[0033] Pick young leaves and stems of wormwood, after cleaning, add a mixed solution of ascorbic acid (0.6%-0.7%) and disodium stannous citrate (0.4%-0.5%) at a liquid-to-solid ratio of 10:1, soak 20-30min, wash. Then in 0.5%-0.7% NaHCO 3 Blanch in boiling water for 2-3 minutes, and the ratio of liquid to solid is 10:1. Then use 400-500ppm Mg 2+ and 500-600ppm Zn2+ The color protection solution (pH6.5-7.5) is soaked for 20-30min for color protection treatment, and the ratio of liquid to material is 10:1. After sufficient rinsing, add wormwood to the same volume of water for beating, then filter to remove the added water, use vacuum packaging, pre-cool at (4±0.5)°C for 12 hours, and perform quick freezing in an intermediate frequency ultrasonic quick freezer. The quick-freezing parameters used are 35KHz, the power is 50W, ...

Embodiment 2

[0034] Example 2: Pretreatment and color protection combined with intermediate frequency ultrasonic quick freezing and thawing wormwood pulp to make Qingming fruit

[0035] Pick young leaves and stems of wormwood, and after cleaning, add a mixed solution of ascorbic acid (0.6-0.7%) and disodium stannous citrate (0.4%-0.5%) at a liquid-to-material ratio of 10:1, soak for 20 -30min, wash, and then in 0.5%-0.7% NaHCO 3 Blanch in boiling water for 2-3min, then use 400-500ppm Mg 2+ and 500-600ppm Zn 2+ The color protection solution (pH6.5-7.5) is soaked for 20-30min for color protection treatment, the ratio of liquid to material is 10:1, after sufficient rinsing, add wormwood to the same volume of water for beating, and then filter to remove the added Water is vacuum-packed, pre-cooled at (4±0.5)°C for 12 hours, and quick-frozen in a medium-frequency ultrasonic quick-freezer. Turn on the ultrasound, turn on the ultrasound every 10s for 20s, complete quick freezing within 10 minu...

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Abstract

The method for preprocessing Asiatic wormwood to preserve the color in combination with quick-freezing and unfreezing for keeping quality belongs to the technical field of fruit-vegetable food storage and processing. The process of the method is as follows: Asiatic wormwood with tender leaves and stalks is chosen, washed and then added with compound enzyme inhibitor, and by regulating the components, content and material-to-solution ratio of the enzyme inhibitor, the activity of polyphenol oxidase in the Asiatic wormwood is inhibited; the Asiatic wormwood is then blanched in boiled water, thepH value of the solution is regulated, the blanching time is adjusted, and while substances with bed flavor, such as absinthin, are completely removed, the loss of the Asiatic wormwood pigment is reduced; after cooling, metal ion color-preserving processing is carried out, and the dosage of metal ions and the pH value of color preservative are determined; after being sufficiently blanched, the Asiatic wormwood is pulped and filtered, vacuum packages are adopted for precooling and medium-frequency ultrasonic quick-freezing, and the Asiatic wormwood is refrigerated under the condition of negative 18 DEG C, and is ultrasonically unfrozen when being applied later. High-quality Asiatic wormwood product is produced by the method, the method is economic and practical, the cost investment is low,the process is simple and easy to implement, and the method can provide technical support for the industrialized production of Asiatic wormwood.

Description

technical field [0001] The invention relates to a method for color protection of wormwood pretreatment combined with ultrasonic quick freezing and thawing to maintain quality, relates to quick freezing processing of color protection of fruits and vegetables, and belongs to the technical field of fruit and vegetable food storage and processing. Background technique [0002] Wormwood ( Artemisia argyi Levt. et Vant ) for Compositae ( Compositae ), is a perennial herb widely distributed in Europe, North America, South Africa and Asia. In my country, it is distributed in Northeast China, North China, East China, South China, Southwest China, Shaanxi and Gansu. Wormwood is rich in nutrients such as volatile oils, flavonoids, eucalyptols, triterpenoids, vitamins, minerals, and amino acids. Studies on its activity have shown that flavonoids in wormwood have anti-oxidation, free radical scavenging, Anticancer and antibacterial and other biological activities. Wormwood is mostly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23B7/00A23B7/05A23B7/045A23B7/154A23B7/005
Inventor 张慜辛颖王拥军徐丰民
Owner JIANGNAN UNIV
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