Lichee natural coating antistaling agent and its preparation method

A technology of coating preservative and preparation method, which is applied in the direction of protecting fruits/vegetables with a coating protective layer, can solve problems affecting human health, food poisoning, etc., and achieve the effect of facilitating industrial production and good fresh-keeping effect

Inactive Publication Date: 2012-03-28
AGRI PROD PROCESSING INST GUANGXI ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these preservatives mainly use drugs such as Shibaoke, carbendazim, and tekto. T...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: Fresh-keeping effect comparison experiment

[0027] 1. Preparation of preservatives:

[0028] Antistaling agent A liquid: firstly dissolve 19.2g citric acid in 1L boiling water, then take about 80% of the citric acid solution and dissolve 10g chitosan while still hot to obtain citric acid solution C; the remaining citric acid After cooling the solution to room temperature, add 0.8g of natamycin, 10g of tea polyphenols and 7g of ascorbic acid, and stir until completely dissolved to obtain citric acid solution D; combine the two citric acid solutions of citric acid solution C and D, stir evenly, and obtain fresh-keeping Solution A, cooled to room temperature for later use.

[0029] Antistaling agent B liquid: first dissolve 20g of citric acid in 1L of boiling water, add 20g of chitosan while it is hot, stir and dissolve to obtain antistaling agent B liquid, cool to room temperature for later use.

[0030] 2. The operation steps of lychee preservation:

[...

Embodiment 2

[0037] 1. Preparation of preservatives:

[0038] Preservative liquid A: first dissolve 30g of citric acid in 1L of boiling water, then take about 80% of the citric acid solution and dissolve 5g of chitosan while still hot to obtain citric acid solution C; the remaining citric acid solution After cooling to room temperature, add 0.2g natamycin, 5g tea polyphenols and 5g ascorbic acid, stir until completely dissolved to obtain a citric acid solution; combine the obtained citric acid solutions C and D, stir evenly to obtain preservative liquid A, cool to Standby at room temperature;

[0039] Solution B: Dissolve 20g of citric acid in 1L of boiling water, add 25g of chitosan while it is hot, stir to dissolve, and obtain preservative solution B, cool to room temperature for later use.

[0040] 2. Operation steps:

[0041] Choose 10 kg of lychees without pests and diseases, use 5 mg / m 3Sterilize with ozone for 5 minutes; immerse the whole lychee fruit in preservative solution A f...

Embodiment 3

[0046] 1. Preservative preparation:

[0047] Preservative liquid A: first dissolve 10g of citric acid in 1L of boiling water, then take about 80% of the citric acid solution and dissolve 8g of chitosan while hot while stirring constantly to obtain citric acid solution C; the remaining citric acid solution After cooling to room temperature, add 2.0 g of natamycin, 15 g of tea polyphenols and 15 g of ascorbic acid, stir until completely dissolved, and obtain citric acid solution D. Combine the two citric acid solutions C and D, stir evenly to obtain preservative solution A, cool to room temperature for later use.

[0048] Antistaling agent B liquid: first dissolve 30g of citric acid in 1L of boiling water, add 25g of chitosan while it is hot, stir and dissolve to obtain antistaling agent B liquid, cool to room temperature for later use.

[0049] 2. Operation steps:

[0050] Choose 10 kg of lychees without pests and diseases, use 5 mg / m 3 Ozone sterilized for 10 minutes; soak ...

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PUM

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Abstract

The invention discloses a lichee natural coating antistaling agent which is characterized in that the coating antistaling agent comprises an antistaling agent A and an antistaling agent B. The antistaling agent employs fresh-keeping components of chitosan, citric acid, natamycin, tea polyphenol, ascorbic acid and the like. In the fresh-keeping process, the antistaling agent is coated on lichee twice for keeping fresh, each fresh-keeping component can be effectively kept on the fruit rough surface of whole lichee, the condition of uneven thickness caused by downward fresh-keeping liquid in thesubsequent treatment and operation processes of placing, air drying and the like can be avoided, the uniform thickness of the film can be effectively controlled, simultaneously, the fresh-keeping effect of each fresh-keeping component is fully performed, and the antistaling agent has good fresh-keeping effect and long fresh-keeping time. In addition, the antistaling agent has the advantages of safety, no toxicity, simple scheme and easy operation, and is convenient for industrial production.

Description

technical field [0001] The invention relates to the field of fruit fresh-keeping, in particular to a lychee-coated fresh-keeping agent and a preparation method thereof. technical background [0002] Litchi (Litchi chinensis Sonn) is one of the subtropical evergreen fruit trees. It has bright red skin, unique flavor and rich nutrition. In fact, the color will change in one day away from the branch, the fragrance will change in two days, the taste will change in three days, and the color and fragrance will disappear in four or five days." This has seriously affected the export of this famous fruit. China is currently the country that cultivates the most lychees. According to statistics, the annual loss of lychees due to rot and deterioration accounts for more than 20% of the total output, causing huge economic losses. [0003] Litchi has physiological characteristics such as water content, high sugar content, rich tannins in the peel, strong activity of polyphenol oxidase and...

Claims

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Application Information

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IPC IPC(8): A23B7/16
Inventor 孙健李昌宝游向荣李丽何全光廖芬李志春张娥珍黄茂康
Owner AGRI PROD PROCESSING INST GUANGXI ACADEMY OF AGRI SCI
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