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2,6-diaminopyridine modified chitosan and preparation method and application thereof

A technology of diaminopyridine and chitosan, applied in chemical instruments and methods, preparation of test samples, other chemical processes, etc., can solve the problems of expensive instruments and equipment, cumbersome operation, easy to be interfered, etc., and achieve excellent adsorption performance. , the effect of speeding up the reaction rate and shortening the reaction time

Inactive Publication Date: 2017-08-08
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the detection and analysis methods of edible synthetic pigments in these foods have the disadvantages of expensive equipment, high cost, susceptible to interference, narrow range of applicable foods, and cumbersome operations.

Method used

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  • 2,6-diaminopyridine modified chitosan and preparation method and application thereof
  • 2,6-diaminopyridine modified chitosan and preparation method and application thereof
  • 2,6-diaminopyridine modified chitosan and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A kind of preparation method of 2,6-diaminopyridine modified chitosan, carries out following steps successively:

[0055] (1) Accurately weigh 0.4g chitosan (CTS) and place in reaction solvent 20ml2% acetic acid solution, stir until dissolving, obtain chitosan acetic acid solution;

[0056] (2) Weigh 2,6-diaminopyridine (2,6-DAP), 30ml of distilled water and 2ml of 25% glutaraldehyde solution in a three-necked flask with a molar ratio of 3:1 to chitosan , placed in a microwave reactor, under 300W microwave radiation power, heated and stirred at 40°C at a speed of 300rmp for 20min;

[0057] (3) add the chitosan acetic acid solution of step (1) in step (2), under 300W microwave radiation power, after heating 40min with 35 ℃, after cooling, add the 5% NaOH aqueous solution soaking of 250ml, then suction filtration, Finally, wash with acetone, ether, ethanol, and distilled water until neutral. Put the washed 2,6-diaminopyridine-modified chitosan at 50° C. for 24 hours in ...

Embodiment 2

[0064] A kind of preparation method of 2,6-diaminopyridine modified chitosan, carries out following steps successively:

[0065] (1) Accurately weigh 0.4g chitosan (CTS) and place in reaction solvent 20ml 4% acetic acid solution, stir until dissolving, obtain chitosan acetic acid solution;

[0066] (2) Weigh 2,6-diaminopyridine (2,6-DAP), 30ml of distilled water and 2ml of 25% glutaraldehyde solution in a three-necked flask with a molar ratio of 3:1 to chitosan , placed in a microwave reactor, under 300W microwave radiation power, heated and stirred at 45°C for 20min at a speed of 300rmp;

[0067] (3) add the chitosan acetic acid solution of step (1) in step (2), under 300W microwave radiation power, after heating 40min with 45 ℃, after cooling, add the 5% NaOH aqueous solution soaking of 250ml, then suction filtration, Finally, wash with acetone, ether, ethanol, and distilled water until neutral. Put the washed 2,6-diaminopyridine-modified chitosan at 50° C. for 24 hours in...

Embodiment 3

[0070] A kind of preparation method of 2,6-diaminopyridine modified chitosan, carries out following steps successively:

[0071] (1) Accurately weigh 0.4g chitosan (CTS) and place in reaction solvent 15ml 5% acetic acid solution, stir until dissolving, obtain chitosan acetic acid solution;

[0072] (2) Weigh 2,6-diaminopyridine (2,6-DAP), 30ml of distilled water and 2ml of 25% glutaraldehyde solution in a three-necked flask with a molar ratio of 3:1 to chitosan , placed in a microwave reactor, under 300W microwave radiation power, heated and stirred at 30°C at a speed of 300rmp for 50min;

[0073] (3) add the chitosan acetic acid solution of step (1) in step (2), under 300W microwave radiation power, after heating 50min with 30 ℃, after cooling, add the 5% NaOH aqueous solution soaking of 250ml, then suction filtration, Finally, wash with acetone, ether, ethanol, and distilled water until neutral. Put the washed 2,6-diaminopyridine-modified chitosan at 50° C. for 24 hours in...

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Abstract

The invention provides a 2,6-diaminopyridine modified chitosan. A preparation method of the 2,6-diaminopyridine modified chitosan comprises the following steps: (1) dissolving chitosan into acetic acid solution to obtain chitosan acetic acid solution; (2) enabling ligand, water and glutaraldehyde aqueous solution to react under microwave radiation to obtain a mixture; (3) in the mixture of step (2), adding the chitosan acetic acid solution obtained in step (1), reacting under the microwave radiation, naturally cooling, adding NaOH aqueous solution for dipping, and carrying out suction filtration, washing and vacuum drying to obtain the 2,6-diaminopyridine modified chitosan. The invention also provides application of the 2,6-diaminopyridine modified chitosan in adsorption of amaranth and application of the 2,6-diaminopyridine modified chitosan for analyzing and detecting the amaranth in beverage. The preparation method disclosed by the invention is simple and feasible, and the obtained 2,6-diaminopyridine modified chitosan has good selective adsorption performance to food synthetic pigments, and can be applied to the analysis and detection field of the amaranth in the beverage.

Description

technical field [0001] The invention relates to the field of food synthetic pigment detection, in particular to a 2,6-diaminopyridine modified chitosan and a preparation method and application thereof. Background technique [0002] In recent years, the amount of food synthetic colorings in my country has been increasing year by year. Driven by profit, lawbreakers break through the permitted varieties, quantities and scopes, abuse food synthetic colorings, and cause food safety violations to occur frequently, threatening the health of consumers. Food safety faces challenges. The abuse of food synthetic coloring has attracted people's attention, and the determination of food synthetic coloring has become the key to food safety. At present, the commonly used detection methods for edible synthetic pigments include high performance liquid chromatography, high performance capillary electrophoresis, polarography, fluorescence spectroscopy, thin layer chromatography and so on. Howe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/08B01J20/24B01J20/30G01N21/31G01N1/40
CPCB01J20/24C08B37/003G01N1/405G01N21/314G01N2021/3155
Inventor 熊春华勇括赵新珍阎亚利胡天晨
Owner ZHEJIANG GONGSHANG UNIVERSITY
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