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Preparation method for ellagic acid-PVP food fresh-keeping solid dispersion

A solid dispersion and food preservation technology, which is applied in food ingredients as solubility improvers, food drying, meat/fish preservation with chemicals, etc. It can solve the problems of poor water solubility, increase the solubility of ellagic acid, etc., and prevent aggregation and growth, improving water solubility, and retaining antioxidant properties

Inactive Publication Date: 2019-04-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to propose a kind of preparation method of ellagic acid-PVP solid dispersion food antistaling agent for the problem that ellagic acid has strong oxidation resistance and poor water solubility, inhibits the aggregation and growth of ellagic acid crystals, and makes ellagic acid Acids are easier to disperse in aqueous solutions, increasing the solubility of ellagic acid, expanding the application of ellagic acid as a preservative in food, especially in aquatic products with high surface moisture content, and promoting the development of the field of food preservation

Method used

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  • Preparation method for ellagic acid-PVP food fresh-keeping solid dispersion

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Experimental program
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Effect test

Embodiment 1

[0020] 1. Pass ellagic acid through 80 mesh sieve 3-5 times, accurately weigh 1g of ellagic acid and 3g of PVP k30 , completely dissolved in 80mL of hot anhydrous ethanol treated in a 60°C water bath under stirring.

[0021] 2. Sonicate the solution obtained in step (1) for 0.5 h.

[0022] 3. Remove the solvent ethanol by rotary evaporation, scrape off the solids on the inner wall of the rotary evaporation bottle, and put it in an oven for 12 hours to balance and dry.

[0023] 4. Grind the solid in a mortar and pass it through an 80-mesh sieve. The obtained light yellow powder is ellagic acid-PVP solid dispersion, which is stored dry.

[0024] The ellagic acid in it can be extracted from pomegranate peel.

[0025] The complexation of ellagic acid and PVP was successful through the identification of infrared spectrum and ultraviolet spectrum. The solubility of ellagic acid in the solid dispersion was increased to 0.4129mg / mL, and it was proved by experiments that the anti-ox...

Embodiment 2

[0028] 1. Pass ellagic acid through a 100-mesh sieve for 3-5 times, and accurately weigh 1g of ellagic acid and 5g of PVP k30 , completely dissolved in 120mL of hot anhydrous ethanol treated in a 60°C water bath under stirring.

[0029] 2. Sonicate the solution obtained in step (1) for 1 h.

[0030] 3. Remove the solvent ethanol by rotary evaporation, scrape off the solids on the inner wall of the rotary evaporation bottle, and put it in an oven for 8 hours to balance and dry.

[0031] 4. Grind the solid in a mortar and pass it through a 100-mesh sieve. The obtained light yellow powder is ellagic acid-PVP solid dispersion, which is stored dry.

[0032] The ellagic acid in it can be extracted from pomegranate peel.

[0033] The complexation of ellagic acid and PVP was successful through the identification of infrared spectrum and ultraviolet spectrum. The solubility of ellagic acid in the solid dispersion is increased to 0.4245 mg / mL, and it is proved by experiments that the...

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Abstract

The invention discloses a preparation method for an ellagic acid-PVP food fresh-keeping solid dispersion. The preparation method comprises the following steps: opening molecular curly chains of polyvinylpyrrolidone (PVP) under dissolved state in thermal ethyl alcohol; refining crystals of ellagic acid under an ultrasonic effect and entering into the curly chains of PVP; removing solvent in the manner of rotary evaporation after ultrasonic treatment, thereby acquiring the ellagic acid-PVP food fresh-keeping solid dispersion. The ellagic acid-PVP food fresh-keeping solid dispersion is capable ofkeeping stable property of ellagic acid while preventing crystal of ellagic acid from gathering and growing; solubility of ellagic acid is increased; the ellagic acid-PVP food fresh-keeping solid dispersion has a bright application prospect at the aspect of fresh keeping of aquatic products; PVPs with different average molecular weight have different cohesiveness and all can be used for preparingsolid dispersion.

Description

technical field [0001] The invention relates to a method for preparing a safe and effective ellagic acid-PVP food fresh-keeping solid dispersion suitable for keeping aquatic products fresh. The prepared ellagic acid-PVP solid dispersion can be used for keeping fish fresh. Background technique [0002] Preservation of aquatic products is the application of physical, chemical and biological means to deal with them, so as to maintain or try to maintain their original freshness. At present, the fresh-keeping technologies applied to aquatic products include low temperature, chemical, irradiation, controlled atmosphere and biological fresh-keeping. Among them, the use of preservatives is the most common, and the cost is low and easy to promote. In recent years, with the improvement of people's awareness of environmental protection and the development of fresh-keeping technology, the safety of chemical fresh-keeping has gradually aroused people's concerns. Began to be used in the...

Claims

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Application Information

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IPC IPC(8): A23B4/20
CPCA23B4/20A23V2002/00A23V2200/238A23V2300/10
Inventor 胡亚芹姚洁玉李苑丁甜陈士国郭鸣鸣陈健初叶兴乾刘东红
Owner ZHEJIANG UNIV
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