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Chitosan compound solution for prolonging storage time of loquat fruits and application of chitosan compound solution

A compound solution and chitosan technology, applied in the direction of protecting fruits/vegetables with a coating protective layer, can solve problems affecting fruit quality and value, difficult to achieve storage effect, prolong storage time, etc., to improve food quality and value, inhibition of browning and rot, and the effect of a simple preparation method

Inactive Publication Date: 2015-01-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the key to restricting the economic benefits of loquats is post-harvest preservation and prolonging the storage time.
At present, the commonly used storage method is to store loquat fruit by using controlled atmosphere storage method, but when the storage conditions are changed to normal temperature state, it will quickly lead to fruit aging, seriously affecting the quality and value of the fruit, and it is very difficult to use a single controlled atmosphere method. Difficult to achieve ideal storage effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Take 10g of water-soluble chitosan with a degree of deacetylation of 95%, add distilled water to dissolve it ultrasonically, and dilute to 200ml.

[0016] 2) Take 20g of salvia miltiorrhiza purchased directly from the market, soak it in 100ml of ethanol with a volume concentration of 80% for 3 hours, and extract it under Soxhlet reflux for 3 hours. After cooling the extract, dilute it to 100ml with 80% ethanol.

[0017] 3) Mix the solutions obtained in steps 1) and 2) with distilled water at a volume ratio of 20:10:70 to form a composite solution.

[0018] 4) Select loquat fruits that are basically the same size and color, without damage, diseases and insect pests, soak in the above compound solution for 1-2 minutes, remove and drain, put the loquats in a carton with a height of 30-40 cm, and place them in a 20- 25 o Store at C for 8 days.

Embodiment 2

[0020] 1) Take 20g of water-soluble chitosan with a degree of deacetylation of 95%, add distilled water for ultrasonic dissolution, and then dilute to 200ml.

[0021] 2) Take 20g of salvia miltiorrhiza purchased directly from the market, soak it in 100ml of ethanol with a volume concentration of 80% for 3 hours, and extract it under Soxhlet reflux for 3 hours. After cooling the extract, dilute it to 100ml with 80% ethanol.

[0022] 3) Mix the solutions obtained in steps 1) and 2) with distilled water at a volume ratio of 20:10:70 to form a composite solution.

[0023] 4) Select loquat fruits that are basically the same size and color, without damage, diseases and insect pests, soak in the above compound solution for 1-2 minutes, remove and drain, put the loquats in a carton with a height of 30-40 cm, and place them in a 20- 25 o Store at C for 8 days.

Embodiment 3

[0025] 1) Take 10g of water-soluble chitosan with a degree of deacetylation of 95%, add distilled water to dissolve it ultrasonically, and dilute to 200ml.

[0026] 2) Take 15g of Salvia miltiorrhiza purchased directly from the market, soak it in 100ml of ethanol with a volume concentration of 80% for 3 hours, and extract it under Soxhlet reflux for 3 hours. After cooling the extract, dilute it to 100ml with 80% ethanol.

[0027] 3) Mix the solutions obtained in steps 1) and 2) with distilled water at a volume ratio of 20:10:70 to form a composite solution.

[0028] 4) Select loquat fruits that are basically the same size and color, without damage, diseases and insect pests, soak in the above compound solution for 1-2 minutes, remove and drain, put the loquats in a carton with a height of 30-40 cm, and place them in a 20- 25 o Store at C for 8 days.

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PUM

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Abstract

The invention discloses a chitosan compound solution for prolonging the storage time of loquat fruits and the application of the chitosan compound solution. The chitosan compound solution is mainly formed by mixing a chitosan water solution, a salvia miltiorrhiza ethanol extracting solution and distilled water according to the volume ratio of 2:1:7. The chitosan water solution is obtained by dissolving 10-20g water-soluble chitosan with the degree of deacetylation being 95% in the distilled water in an ultrasonic mode and then enabling the chitosan water solution to be in constant volume 200ml. According to the preparation method of the salvia miltiorrhiza ethanol extracting solution, 15-30g salvia miltiorrhiza is soaked in an ethanol solution with the volume concentration being 80% for three hours, then Soxhlet reflux extraction is carried out on the solution for three hours, and the volume of extracted liquid is fixed to 100ml through ethyl alcohol with the volume concentration being 80% after the extracted liquid is cooled to be at room temperature. The chitosan compound solution for prolonging the storage time of loquat fruits can effectively restrain loquat fruits from brown stain and decay, maintains a healthy fruit rate of loquat fruits in a long time, and obviously improves the eating quality and value of loquat fruits.

Description

technical field [0001] The invention relates to fruit storage technology, in particular to a chitosan composite solution for prolonging the storage of loquat fruit at normal temperature and its application. Background technique [0002] Chitosan is a natural polymer polysaccharide extracted from the shell of crustaceans. It has good biocompatibility and no side effects. Due to the free amino group on its molecular chain, it can combine hydrogen protons from the solution so that chitosan becomes a positively charged polyelectrolyte. We define the chitosan with N-deacetylation degree in the range of 55-70% as low deacetylation degree chitosan, the range of 70-85% as middle deacetylation degree chitosan, and the range of 85-95% as Chitosan with high degree of deacetylation, more than 95% is defined as ultra-high degree of deacetylation chitosan. In recent years, research results have shown that chitosan with different degrees of deacetylation, due to its unique molecular stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23B7/16
Inventor 丁兴成王晶晶
Owner ZHEJIANG UNIV
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