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Method for removing arsenic from Antarctic krill oil

An Antarctic krill oil and removal technology, applied in the direction of oil/fat refining, fat production, etc., can solve the problems of difficult removal of adsorbents and complicated arsenic methods, and achieve the effects of easy separation, environmental friendliness, and enhanced safety.

Pending Publication Date: 2020-01-24
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problems that the traditional method for removing arsenic in Antarctic krill oil is complicated and the adsorbent is difficult to remove, the present invention provides an environmentally friendly and easy-to-separate method for removing arsenic in Antarctic krill oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) prepare magnetic chitosan:

[0025] Disperse chitosan in acetic acid solution, pass nitrogen gas, heat and stir at 75°C for 30min, add 2.4g FeCl 3 ·6H 2 O and 0.9 g FeCl 2 4H 2 O, adjust the pH to 9, under the protection of an inert gas, stir evenly, use an external magnetic field to separate the magnetic chitosan, alternately wash with deionized water and ethanol, and obtain the magnetic chitosan after freeze-drying;

[0026] (2) Preparation of EDTA grafted magnetic chitosan:

[0027] Suspend EDTA dianhydride in methanol, add magnetic chitosan aqueous solution, stir at room temperature for about 24 hours, after ultrafiltration, mix and stir the precipitate with ethanol for 12 hours to obtain EDTA grafted magnetic chitosan; EDTA dianhydride and magnetic The mass ratio of chitosan is 3:1;

[0028] (3) Removal of arsenic in Antarctic krill oil:

[0029] Disperse Antarctic krill oil in an organic solvent, add EDTA-grafted magnetic chitosan, and after ultrasonic s...

Embodiment 2

[0031] (1) prepare magnetic chitosan:

[0032] Disperse chitosan in acetic acid solution, blow in nitrogen, heat and stir at 80°C for 15min, add Fe 3+ and Fe 2+ mixed salt solution, adjust the pH to 8, under the protection of an inert gas, stir evenly, use an external magnetic field to separate the magnetic chitosan, wash it alternately with deionized water and ethanol, and obtain the magnetic chitosan after freeze-drying; 3+ and Fe 2+ Fe in the mixed salt solution 3+ and Fe 2+ The molar ratio of the substance is 4:1;

[0033] (2) Preparation of EDTA grafted magnetic chitosan:

[0034] Suspend EDTA dianhydride in methanol, add magnetic chitosan aqueous solution, stir at room temperature for about 12 hours, after ultrafiltration, mix and stir the precipitate with ethanol for 6 hours to obtain EDTA grafted magnetic chitosan; EDTA dianhydride and magnetic The mass ratio of chitosan is 5:1;

[0035] (3) Removal of arsenic in Antarctic krill oil:

[0036] Disperse Antarctic...

Embodiment 3

[0038] (1) prepare magnetic chitosan:

[0039] Disperse chitosan in acetic acid solution, pass nitrogen gas, heat and stir at 65°C for 35min, add Fe 3+ and Fe 2+ mixed salt solution, adjust the pH to 8, under the protection of an inert gas, stir evenly, use an external magnetic field to separate the magnetic chitosan, wash it alternately with deionized water and ethanol, and obtain the magnetic chitosan after freeze-drying; 3+ and Fe 2+ Fe in the mixed salt solution 3+ and Fe 2+ The molar ratio of the substance is 3:1;

[0040] (2) Preparation of EDTA grafted magnetic chitosan:

[0041]Suspend EDTA dianhydride in methanol, add magnetic chitosan aqueous solution, stir at room temperature for about 20 hours, after ultrafiltration, mix the precipitate with ethanol and stir for 8 hours to obtain EDTA grafted magnetic chitosan; EDTA dianhydride and magnetic The mass ratio of chitosan is 4:1;

[0042] (3) Removal of arsenic in Antarctic krill oil:

[0043] Disperse Antarctic...

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Abstract

The invention relates to the technical field of aquatic product processing. In order to solve the problems that a traditional method for removing arsenic in Antarctic krill oil is complex and an adsorbent is hard to remove, the invention provides a method for removing arsenic in Antarctic krill oil. The method comprises the following steps: dispersing Antarctic krill oil in an organic solvent, adding EDTA (ethylene diamine tetraacetic acid) grafted magnetic chitosan, performing an ultrasonic oscillation reaction, and removing the EDTA grafted magnetic chitosan, so as to obtain Antarctic krilloil of which arsenic is removed. By adopting the method, EDTA grafted magnetic chitosan microspheres are adopted to efficiently adsorb and remove the arsenic from the Antarctic krill oil, the materialhas the advantages of being environmentally friendly, easy to separate, long-lasting in application, and the like, the application of the Antarctic krill oil of which the arsenic is removed can be widened, and the security of the Antarctic krill oil can be improved.

Description

technical field [0001] The invention relates to the technical field of aquatic product processing, in particular to a method for removing arsenic from Antarctic krill oil. Background technique [0002] At present, Antarctic krill has become the most important fishery resource in the world's distant water fishing industry. Antarctic krill is rich in total fat, and Antarctic krill oil extracted from Antarctic krill is rich in Omega-3 (ω-3) polyunsaturated fatty acid phospholipids and bioactive lipids such as astaxanthin. Studies have shown that Antarctic krill oil has multiple functions such as anti-oxidation, anti-aging, scavenging free radicals, lowering blood lipids, strengthening the brain and improving intelligence. Antarctic krill oil has been applied in many fields such as food and health products. While Antarctic krill is widely valued as an important biological resource, the food safety of its related products, especially the content of toxic heavy metal arsenic in i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B3/10
CPCC11B3/10
Inventor 曲有乐欧阳小琨卢雨清杨立业郁迪
Owner ZHEJIANG OCEAN UNIV
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