Refrigerated blueberry chitosan coating fresh-keeping method

A technology of coating fresh-keeping and coating fresh-keeping agent, which is applied in the direction of protecting fruits/vegetables with a coating protective layer, can solve the problems such as the reduction of flavor, texture, color, taste and nutrients, affecting product quality, etc., and achieve effective fresh-keeping Ways, improve quality, increase the effect of economic benefits

Inactive Publication Date: 2012-11-28
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flavor, texture, color, taste and nutritional content of blueberries will be greatly reduced during cooling, freezing, frozen storage and thawing, which will affect the quality of the product.

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0021] The present invention comprises the following steps:

[0022] 1. The pretreatment of fresh blueberry comprises the following steps:

[0023] 1.1 Select blueberries with fresh quality, no trauma, no pests and diseases;

[0024] 1.2 Pre-cool the selected fresh blueberries at 0-4°C for 24 hours;

[0025] 1.3 Wash the pre-cooled blueberries in a NaOCl solution with a concentration of 250 mg / kg for 30 seconds, rinse with water for 30 seconds, and air-dry at room temperature, wherein the weight ratio of blueberries to NaOCl solution is 1:3;

[0026] 2. the preparation of chitosan coating preservative comprises the following steps:

[0027] 2.1 Chitosan coating preservative is composed of water-soluble chitosan, glycerin, Span 40, high fructose corn syrup, high-methoxyl pectin and distilled water, each component is: water-soluble chitosan 3% , Glycerin 0.75%, Span 400.25%, High Fructose Corn Syrup 5%, High Methoxyl Pectin 3%, Distilled Water 88%; Glycerin is a plasticizer, ...

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PUM

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Abstract

The invention relates to a refrigerated blueberry chitosan coating fresh-keeping method, belonging to the technical field of fresh keeping of agricultural products. A chitosan coating fresh-keeping agent comprises the following components in percentage by mass: 3% of water soluble chitosan, 0.75% of glycerol, 0.25% of Sapn 40, 5% of high fructose corn syrup, 3% of high methoxy pectin and 88% of distilled water. Fresh blueberries are pretreated, coated with the chitosan coating fresh-keeping agent and refrigerated to achieve the effect of keeping fresh. With the coating fresh-keeping method, the change of flavor and color and the loss of nutrients for blueberries in the refrigeration and thawing period can be slowed down, especially the problems of texture hardening and juice loss are solved, a new and effective fresh keeping approach is provided for refrigerated blueberries, the quality of the refrigerated blueberries can be obviously improved, and the economic benefit can be increased.

Description

technical field [0001] The invention belongs to the technical field of fresh-keeping of agricultural products, and in particular relates to a fresh-keeping method of vacuum-impregnated chitosan coating for frozen blueberries. Background technique [0002] Blueberry (Blueberry) belongs to the genus Vaccinium spp. of Ericaceae. The flesh is delicate, sweet and sour, and rich in nutrition. It is a wild fruit with high edible and health value. It can be eaten fresh or processed into juice , fruit wine and candy, etc. In addition to containing conventional sugar, acid and V C , also contains niacin, SOD, arbutin, anthocyanins and flavonoids and other compounds and rich trace elements, which can prevent brain aging, strengthen the heart, resist fatigue, regulate human blood circulation, activate human cell regeneration, and protect eyes Retina, prevention and treatment of myopia, prevention of arteriosclerosis, beauty nourishing kidney and anti-cancer and other health care funct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23B7/16
Inventor 姜燕张海悦牛彦清马中苏鲍慧娟
Owner CHANGCHUN UNIV OF TECH
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