Duck fatty liver oil and preparation method thereof

A technology of duck fatty liver and petroleum ether, which is applied in the field of duck fatty liver oil and its preparation, can solve the problems of low extraction rate of duck fatty liver oil, low oil purity, and high degree of fatty acid oxidation, and achieve good disinfection effect, high oil purity, and low oxidation low degree of effect

Inactive Publication Date: 2017-10-20
QINGDAO AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems of low extraction rate of duck fatty liver oil, low oil purity and high degree of fatty acid oxidation in the prior art by providing a duck fatty liver oil and a preparation method thereof

Method used

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  • Duck fatty liver oil and preparation method thereof
  • Duck fatty liver oil and preparation method thereof
  • Duck fatty liver oil and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0036] (1) Preparation of duck fatty liver slurry: the duck fatty liver sample is mashed by a tissue masher and becomes a slurry, which is not only conducive to the full contact between the sample and the extractant, but also easy to combine with the enzyme during the enzymatic hydrolysis process, which is beneficial to enzymatic hydrolysis , it is easier to release the fat particles, making the extraction effect better.

[0037] (2) Selection of duck fatty liver hydrolase: select acid protease, alkaline protease, neutral protease, papain and bromelain for enzymolysis under suitable conditions to determine the type of protease.

[0038] (3) Enzymolysis of duck fatty liver: acid protease is used for enzymolysis to release the bound fatty acids.

[0039] (4) Extraction of duck fatty liver oil: After the homogenate after enzymolysis and petroleum ether were mixed and treated with ultrasonic waves, the extract was centrifuged at 4000r / min for 20min, the supernatant was filtered, a...

Embodiment 1

[0041] Example 1: Extraction of duck fatty liver oil by ultrasonic-assisted enzymatic hydrolysis

[0042] 1. Preparation of duck fat liver slurry

[0043] The duck fatty liver used in the test was chopped and mixed into uniform small pieces, put into a tissue masher and fully mashed into a slurry, then packed into different fresh-keeping bags, and stored in a refrigerator below minus 18°C ​​until use.

[0044] 2. Determination of the type of protease

[0045] Select acid protease, alkaline protease, neutral protease, papain, and bromelain to carry out enzymatic hydrolysis under suitable conditions to determine the type of protease. The ultrasonic treatment time is 5 minutes and the ultrasonic treatment power is 200w. Experiments were carried out to determine the extraction rate of duck fatty liver oil, and to screen the protease types.

[0046] 3. Hydrolyzed duck fatty liver with acid protease

[0047] Add duck fatty liver and citric acid-disodium hydrogen phosphate buffer so...

Embodiment 2

[0080] Embodiment 2: solvent extraction method extracts duck fat liver oil

[0081] 1. Preparation of duck fat liver slurry

[0082] Cut the duck fatty liver used in the test into uniform small pieces, put it into a tissue masher and mash it into a slurry, pack it into different fresh-keeping bags, and store it in a refrigerator or cold storage below minus 18°C Save for later use.

[0083] 2. Extraction of duck fatty liver oil

[0084] According to the ratio of solid to liquid (mass volume ratio of duck fatty liver slurry to extract) 1:6, extraction time is 13 minutes, petroleum ether is used as extractant; pure duck fatty liver oil is obtained after evaporation at 60°C for 1 hour. . The results show that the extraction rate of duck fatty liver oil obtained in Example 2 is 49.25% (accounting for the weight of duck fatty liver), accounting for 81.40% of the total fat content of duck fatty liver, and the extraction rate of duck fatty liver oil is lower than that of Example 1....

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Abstract

The invention discloses a preparation method of a duck fatty liver oil. The method specifically includes the steps of: (1) preparation of duck fatty liver slurry: chopping duck fatty liver and performing tissue homogenization to obtain a slurry; (2) duck fatty liver enzymolysis: mixing the slurry and a buffer solution according to a ratio of 1:0-2.5, and adding protease for enzymolysis of the slurry; and (3) extraction of duck fatty liver oil: after enzymolysis, mixing the slurry with petroleum ether, then performing ultrasonic extraction, then carrying out high speed centrifugation, taking the supernatant and performing filtering, and utilizing a vacuum rotary evaporator to remove petroleum ether from the filtrate. The invention adopts an ultrasonic assisted enzymatic extraction method to prepare duck fatty liver oil, and the method has the advantages of full extraction of grease from duck fatty liver, reduction of temperature, time saving, simple process, and high maneuverability.

Description

technical field [0001] The invention belongs to the technical field of oil extraction, and in particular relates to duck fatty liver oil and a preparation method thereof. Background technique [0002] Duck fatty liver is produced by stuffing ducks with specific feed and preparation techniques. The main active substance of duck fatty liver is duck liver oil, which is rich in nutrients such as unsaturated fatty acids, lecithin, triglycerides and various trace elements needed by the human body. The content of unsaturated fatty acids in duck fatty liver is very high, which has the effects of delaying aging, lowering blood lipids and softening blood vessels. Moreover, the linoleic acid contained in duck fatty liver is an essential fatty acid, which cannot be synthesized by the human body and can only be obtained from food. At present, the sales method of duck fatty liver is single, most of which are cold chain sales, and the development of high value-added products is almost zer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B1/02C11B1/10C11B3/00C11B3/16
CPCC11B1/025C11B1/106C11B3/001C11B3/008C11B3/16
Inventor 王宝维秦鹏飞孙京新葛文华张名爱岳斌
Owner QINGDAO AGRI UNIV
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