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Method for reducing DHA (docosahexaenoic acid) oil anisidine value

A technology for anisidine value and oil, which is applied in the field of biochemistry, can solve problems such as increased risk, toxicity, increased production cost and the like, and achieves the effect of reducing the effect

Inactive Publication Date: 2017-01-04
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The patent of Chinese Patent Publication No. CN102976936A discloses a method for reducing the peroxide value and anisidine value in unsaturated fatty acid ethyl ester: using unsaturated fatty acid ethyl ester as raw material, using sodium borohydride to combine with carbon and oxygen double bonds to react, so that aldehydes and ketones are converted into alcohols, so as to reduce the peroxide value and anisidine value. Burning, there is a great safety hazard during use; and sodium borohydride is a toxic and harmful substance, which can strongly stimulate mucous membranes, upper respiratory tract, eyes and skin. After inhalation, it may cause spasm, inflammation and edema of the larynx and bronchi Death due to chemical pneumonia and pulmonary edema. Protective devices for the respiratory system, eyes, hands, etc., such as self-contained breathing apparatus, goggles, etc. are required when used. The production environment also needs to be equipped with anti-leakage equipment, etc., which greatly increases the production cost.
[0008] Some literatures have reported the method of using adsorbents to reduce the anisidine value of oil or decolorize and deodorize, but the temperature used in the adsorption must be higher than 100°C to achieve the energy exchange required in the adsorption process and increase the concentration of the adsorbed substances such as pigments. Adsorption speed. Enhance the adsorption, but this method consumes a lot of energy, increases the risk of operation in production, is not conducive to the industrial production of fish oil, and cannot achieve the ideal adsorption effect

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  • Method for reducing DHA (docosahexaenoic acid) oil anisidine value

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: This embodiment illustrates the assay method of anisidine value

[0027] The detection of the anisidine value, according to the detection method of the anisidine value described in the national standard GBT 24304-2009, determines the oil anisidine value, and the specific method is:

[0028] Preparation of anisidine reagent: Take an X ml volumetric flask, directly weigh 0.0025X g p-methoxyaniline into it, dissolve it to the mark with acetic acid, and store it away from light.

[0029] Preparation of the test solution: Weigh an appropriate amount of the prepared fish oil concentrate, accurate to 1mg, put it directly into a 25mL volumetric flask, dissolve it with 5mL-10mL isooctane, and dilute to the mark with the same solvent.

[0030] Determination of unreacted solution: Use a pipette to absorb 5mL of the test solution into a stoppered test tube, add 1mL of glacial acetic acid solution with a pipette, cover the stopper and shake well. Place in a dark place...

Embodiment 2

[0042] Embodiment 2: This embodiment illustrates the method for reducing DHA oil anisidine value

[0043] Fill the reaction vessel with nitrogen protection, take 100g of oil with an AV value of 19.7 and a DHA content of 36.81%, add 5ml (equivalent to 5.0g) of diethyl malonate, mix well, and heat to 35°C.

[0044] Dissolve 3g of sodium hydroxide in 7.5ml of water, add to the above reaction system, and stir for 30min.

[0045] After the reaction was completed, 15ml of saturated NaCl solution was added, stirred for 30min, and the anisidine value of the oil was measured after sampling and centrifugation.

[0046]After the reaction, the anisidine value decreased to 3.4, the fishy smell of the oil disappeared and had a faint ester fragrance, the oil recovery was 83.2g, and the DHA content was determined to be 36.17%.

Embodiment 3

[0047] Embodiment 3: This embodiment illustrates the method for reducing DHA oil anisidine value

[0048] Fill the reaction vessel with nitrogen protection, take 100g of DHA oil with an AV value of 19.7, add 2.5ml (equivalent to 2.5g) of diethyl malonate, mix well, and heat to 35°C.

[0049] Dissolve 1.5g of sodium hydroxide in 5ml of water, add to the above reaction system, and stir for 30min.

[0050] After the reaction was completed, 15ml of saturated NaCl solution was added, stirred for 30min, and the anisidine value of the oil was measured after sampling and centrifugation.

[0051] After the reaction, the anisidine value decreased to 9.7, the fishy smell of the oil disappeared and had a faint ester fragrance, and 94.1 g of the oil was recovered.

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Abstract

The invention discloses a method for reducing DHA (docosahexaenoic acid) oil anisidine values. Under protection of inert gas, sodium hydroxide solution and diethyl malonate are added into grease, the grease is cleaned by saturated sodium chloride solution after reaction to obtain treated DHA-containing grease. The DHA-containing grease is treated by the method, the DHA oil anisidine values can be reduced, and the fishy taste of the DHA oil can be sensuously reduced.

Description

technical field [0001] The invention belongs to the field of biochemistry, and relates to a method for treating oil containing DHA by a chemical method, and also relates to a method for reducing the anisidine value of DHA oil. Background technique [0002] DHA, the full name of docosahexaenoic acid, is a derivative of linolenic acid in organisms. It is an n-3 series long-chain polyunsaturated fatty acid. It has the function of promoting the growth of nerve cells and maintaining their operation. Baby's Both brain and retina development need sufficient DHA, otherwise it will seriously affect the health of infants. Therefore, DHA has become an important nutritional supplement for infants and young children. DHA also has multiple functions such as inhibiting platelet aggregation, antithrombotic, dilating blood vessels, regulating blood lipids, anticancer, anti-inflammation, etc., and has very important nutritional and medicinal values. [0003] One of the main problems of DHA o...

Claims

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Application Information

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IPC IPC(8): C11C3/00
CPCC11C3/00
Inventor 黄和左文路胡学超任路静徐加莉
Owner NANJING UNIV OF TECH
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