Method for extracting grease in food and application thereof

An extraction method and oil technology, which is applied in the field of oil extraction in food, can solve the problems of large amount of oil, easy oxidation, and influence on detection results, etc., and achieve the effect of low toxicity and easy operation

Inactive Publication Date: 2021-11-16
SHANDONG INST FOR FOOD & DRUG CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) When filtering, some fine particles in the sample enter the filtrate through the filter holes, which makes the prepared oil contain more impurities, which greatly affects the test results
[0007] (2) Other finer particles of the sample will block the filter pores during filtration, which significantly increases the filtration time, which not only affects the detection efficiency, but more importantly, the oil is prone to oxidation during the long-term filtration process, thus affecting the detection Result accuracy
[0008] (3) The amount of oil required for acid value detection and weighing is large, and the oil extraction and preparation method in the national standard method is difficult to meet the test requirements

Method used

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  • Method for extracting grease in food and application thereof
  • Method for extracting grease in food and application thereof
  • Method for extracting grease in food and application thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0041] First Embodiment: Precision Test

[0042] In this example, 6 representative samples commonly found on the market were selected, including 3 samples of peanut butter and 3 samples of sesame paste. Oil and fat were prepared according to the following steps, and the acid value and peroxide value were measured respectively. The specific process is as follows:

[0043] (1) Weigh 100g of each sample into a stoppered container, add 100mL of acetone-water mixed solvent (the volume ratio of acetone and water is 1:1) as a flocculant, then vigorously stir and mix with a glass rod, and then add 300mL Petroleum ether, plugged, shaken to extract. After standing and stratifying for 40 minutes, take the upper clear and transparent organic phase layer, filter the organic phase with anhydrous sodium sulfate filter paper for dehydration, and collect the filtrate in a brown glass rotary evaporator for future use.

[0044] (2) Rotate the filtrate obtained in step (1) to remove the solvent...

no. 2 example

[0053] Second embodiment: accuracy test

[0054] Due to the determination of acid value and peroxide value, conventional methods such as standard recovery test and quality control sample test cannot be used to investigate the accuracy. According to the accuracy evaluation basis of GB / T 27417-2017 "Guidelines for Confirmation and Verification of Chemical Analysis Methods for Conformity Assessment", the bias of another method can be evaluated according to the known nationally recognized reference method, and the t-test method is used to compare the analytical method. The significance of bias between them was assessed.

[0055] The current national standard directly detects the method of acid value and peroxide value in animal and vegetable oils and fats is accurate and reliable. We only need to verify that the extraction and preparation methods of peanut butter and sesame butter sample oils are accurate and reliable to ensure the accuracy of the method of the present invention...

no. 3 example

[0063] The 3rd embodiment: national standard method and the method of the present invention process the sample back static state comparative experiment

[0064] In order to visually compare and contrast the national standard method (GB 5009.227-2016 or GB 5009.229-2016) and the state of standing after the sample is processed by this method, the same sesame paste sample is selected for the following steps.

[0065] Process the sample according to the national standard method: Weigh 10g of sesame paste sample into a 1# stoppered test tube, add 30mL of petroleum ether, shake and extract, then let it stand for different times, and observe its state.

[0066] Process sample according to the method of the present invention: take by weighing 10g sesame paste sample in 2# stopper test tube, add 10mL acetone-water mixed solvent (the volume ratio of acetone and water is 1:1) as flocculant, then vigorously stir and mix with glass rod Mix well, then add 30mL of petroleum ether, shake to...

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Abstract

The invention discloses a method for extracting grease in food and application thereof, and the method comprises the following steps: (1) mixing sesame paste or peanut butter with a flocculant, violently stirring and uniformly mixing, then adding a grease extraction agent, shaking, and standing; and (2) after standing and layering, taking an upper-layer organic-phase supernatant, carrying out dehydration treatment on the organic phase, and then carrying out desolventizing treatment, so as to obtain the grease to be detected. According to the method, protein is subjected to modification treatment and then is extracted and filtered, so that the method is simple and convenient to operate, is more efficient and rapid, and effectively solves the problem of inaccurate detection caused by oxidation due to overlong filtering time in the process of extracting grease in peanut butter and sesame paste samples. Meanwhile, an organic phase in the filtered filtrate can be quickly removed in an evaporation manner, so that the oil extraction and preparation time is remarkably shortened, and the detection efficiency is greatly improved. In addition, the method disclosed by the invention is good in oil extraction effect and extremely easy to meet the use amount required by an oil test.

Description

technical field [0001] The invention belongs to the technical field of food detection, and in particular relates to a method for extracting fat from food and an application thereof. Background technique [0002] The information disclosed in this Background section is intended to enhance the understanding of the general background of the invention, and it is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those of ordinary skill in the art. [0003] Nut and seed butter is a paste made from nuts, seeds or their kernels as the main raw materials, mainly including peanut butter, sesame paste, etc. Peanut butter and sesame paste are condiments with high nutritional value, rich in nutrients such as fat, protein, carbohydrates, and minerals, and have unique flavors, and are widely used in diets. Because sesame paste and peanut butter are rich in oil, they are prone to rancidity and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/38G01N1/40G01N33/03
CPCG01N1/28G01N1/38G01N1/40G01N1/4077G01N33/03G01N2001/4088
Inventor 高牡丹师景双鲍连艳杨振东任雪梅
Owner SHANDONG INST FOR FOOD & DRUG CONTROL
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