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Preparation method of chitosan microspheres for adsorbing shellfish toxins

A technology of chitosan microspheres and shellfish toxins, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of difficult recovery of carriers and adsorbates, and achieve low cost, Simple preparation, good adsorption effect

Inactive Publication Date: 2018-07-06
舟山出入境检验检疫局综合技术服务中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chitosan in its natural state is mostly in the form of powder, and as an adsorption carrier, it is difficult to recover both the carrier and the adsorbate, thus limiting its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing chitosan microspheres for adsorbing shellfish toxins is characterized in that it comprises the following steps: first gradually adding 120 parts by weight of acetic acid solution to 3 parts by weight of chitosan, so that the chitosan is dissolved in In the acetic acid solution, then refrigerate at a low temperature for 18 hours at a temperature of 3°C, then suck the chitosan into the syringe, and then add the chitosan in the syringe dropwise to the coagulation liquid, and the chitosan is condensed into a sphere Then, it was washed repeatedly with deionized water until it was neutral, and then subjected to vacuum freeze-drying. The viscosity average molecular weight of chitosan was 480kDa.

[0033] Wherein, the coagulation liquid is prepared by the following method: 30 parts by weight of sodium hydroxide solution and 20 parts by weight of 5% sodium carbonate solution are mixed, and then 2 parts by weight of ethyl acetate are added and uniformly stirred...

Embodiment 2

[0038] A method for preparing chitosan microspheres for adsorbing shellfish toxins is characterized in that it comprises the following steps: first gradually adding 120 parts by weight of acetic acid solution to 3 parts by weight of chitosan, so that the chitosan is dissolved in In the acetic acid solution, then refrigerate at a low temperature for 18 hours at a temperature of 3°C, then suck the chitosan into the syringe, and then add the chitosan in the syringe dropwise to the coagulation liquid, and the chitosan is condensed into a sphere Then, it was repeatedly washed with deionized water to make it neutral, and then subjected to vacuum freeze-drying. The viscosity average molecular weight of chitosan was 480kDa.

[0039] Wherein, the coagulation liquid is prepared by the following method: adding 40 parts by weight of sodium hydroxide to 2 parts by weight of ethyl acetate, and uniformly stirring.

[0040] Wherein, the chitosan is prepared by the following method:

[0041] (1) Put...

Embodiment 3

[0044] A method for preparing chitosan microspheres for adsorbing shellfish toxins is characterized in that it comprises the following steps: first gradually adding 140 parts by weight of an acetic acid solution to 4 parts by weight of chitosan, so that the chitosan is dissolved in In the acetic acid solution, then refrigerate at a low temperature for 19 hours at a temperature of 4°C, then suck the chitosan into the syringe, and then add the chitosan in the syringe dropwise to the coagulation liquid, and the chitosan is condensed into a sphere Then, it was repeatedly washed with deionized water to make it neutral, and then subjected to vacuum freeze-drying. The viscosity average molecular weight of chitosan was 480kDa.

[0045] Wherein, the coagulation liquid is prepared by the following method: mixing 35 parts by weight of sodium hydroxide solution and 25 parts by weight of 5% sodium carbonate solution, and then adding 2 parts by weight of ethyl acetate, and uniformly stirring.

...

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Abstract

The invention relates to the field of food safety, in particular to a preparation method of chitosan microspheres for adsorbing shellfish toxins. The invention adopts the following technical scheme: the preparation method of chitosan microspheres for adsorbing shellfish toxins is characterized by comprising the following steps: first, gradually adding 120-160 parts by weight of acetic acid solution to 3-4 parts by weight of chitosan to ensure that the chitosan is dissolved in the acetic acid solution; then carrying out low-temperature refrigeration for 18-20 hours; then sucking chitosan into asyringe; then dropwise adding the chitosan in the syringe into coagulation liquid; after the chitosan is coagulated into spheres, repeatedly washing the spheres to be neutral by deionized water; andthen carrying out drying. The chitosan microspheres provided by the invention have the advantages of high adsorption efficiency and good adsorption effect.

Description

Technical field [0001] The invention relates to the field of food safety, in particular to a preparation method of chitosan microspheres for adsorbing shellfish toxins. Background technique [0002] Shellfish toxin is a marine natural organic matter, and its formation is closely related to the red tide of toxic algae in the ocean. Harmful red tides have become a worldwide problem, the scope of their occurrence is still expanding, and the types of harmful algae that can form red tides are also increasing. According to literature reports, there are about 184,267 species of microalgae that can form red tides, of which about 60-78 species of toxic microalgae. Toxins produced by toxic algae often enter the shellfish body through the food chain, so these toxins are usually called shellfish poison. People eat shellfish with shellfish poison and cause food poisoning. The pollution of shellfish toxins in the four sea areas of my country is very serious. The investigation found that ext...

Claims

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Application Information

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IPC IPC(8): C08J3/16C08L5/08B01J20/24B01J20/28B01J20/30
CPCB01J20/24B01J20/28021C08J3/16C08J2305/08
Inventor 邵宏宏周秀锦王琦相兴伟张静傅谧妮
Owner 舟山出入境检验检疫局综合技术服务中心
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