A method for preventing fresh lichee pericarp from darkening by citric acid

A technology of lychee peel and citric acid, which is applied in the field of citric acid to prevent the darkening of fresh lychee peel, can solve the problem of being unable to prevent the color change of fresh lychee skin, and achieve the effect of increasing commercial value and prolonging storage time

Inactive Publication Date: 2006-12-13
许连科
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many existing preservatives and fresh-keeping methods c

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Take 1000ml of water, 280g of citric acid, and 1000g of fresh lychee, soak the fresh lychee in the aqueous solution of citric acid for 20 minutes, take it out, dry the water, and place it at room temperature. Red does not change.

Embodiment 2

[0016] Example 2: Take 7Kg of citric acid, 18Kg of water, 150g of sodium sorbate, and 20Kg of fresh lychee, dissolve the citric acid and sodium sorbate in water, immerse the lychee for 50 minutes, take it out, and place it at -20°C for 300 days. After taking out and thawing at room temperature, the lychee peel is bright red. Sorbic acid is a preservative.

Embodiment 3

[0017] Embodiment 3: get citric acid 15Kg, water 40Kg, sodium benzoate 500g, white sugar 8Kg, starch 5Kg, fresh litchi 100Kg, after citric acid is dissolved in water, starch, white sugar, sodium benzoate are added under the high temperature of 90 ℃ again, become Paste colloid, after cooling, make it adhere to the surface of the litchi peel, and dry it at room temperature, place it in an environment with a relative humidity of 90% at 2°C for 30 days, take it out, the litchi peel is intact, and the color is bright red. Among them, sodium benzoate has antiseptic effect, white sugar has bactericidal effect, and starch has adhesion effect.

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PUM

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Abstract

A kind of method that uses citrate to prevent fresh leechee periearp blackening, the fresh leechee shall be immersed in the citrate solution or the citrate stick to the fresh leechee periearp . The invention can proceed that prevent fresh leechee periearp blackening treatment before or after store fresh leechee, also can add the antiseptic bacterial agent, colloid, water into citrate, can make the fresh lechee under the stuff shelf, improve the economical value of fresh leechee.

Description

technical field [0001] The invention relates to fresh lychee preservation technology, in particular to a method for preventing fresh lychee peels from turning black with citric acid. Background technique [0002] In the prior art, the blackening of fresh lychee pericarp is the most difficult technical problem to solve in the fresh lychee preservation technology. The skin of fresh lychees starts to lose its brilliance from the moment it is picked. Half a day later, the skin of the lychees starts to darken. It starts to turn black in one day, and the skin becomes ugly the next day. Many existing preservatives and fresh-keeping methods all cannot stop the color and luster change of this fresh lychee epidermis. Therefore, aiming at the deficiencies in the prior art, it is necessary to develop a method for preventing fresh litchi cortex from darkening. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a method for pre...

Claims

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Application Information

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IPC IPC(8): A23B7/153
Inventor 许连科
Owner 许连科
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