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Method for ultrasonic extraction of rice grain crude fat

A technology of rice grains and crude fat, which is applied in the preparation of test samples, etc., can solve the problems of low extraction efficiency, many organic solvents, and large sample requirements, and achieve the effect of less solvent consumption, satisfactory processing, and short time

Inactive Publication Date: 2015-11-04
SICHUAN AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the Soxhlet extraction method has strong adaptability, due to the relatively low fat content in rice, the Soxhlet extraction method has disadvantages such as large sample requirements, many organic solvents, long extraction time, low extraction efficiency, and easy waste of environment and resources.

Method used

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  • Method for ultrasonic extraction of rice grain crude fat
  • Method for ultrasonic extraction of rice grain crude fat
  • Method for ultrasonic extraction of rice grain crude fat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 Ultrasonic extraction of crude fat from rice grains was performed according to the following steps:

[0037] (1) Drying and pulverizing the rice grains;

[0038] (2) Add an appropriate amount of powder sample prepared in step (1) to the extract and mix thoroughly;

[0039] (3) Extract crude fat under ultrasonic conditions, make the fat enter the extraction solution, and then remove insoluble impurities to obtain a fat solution.

[0040] As an optional mode, in the method for ultrasonically extracting crude fat from rice grains, a step (4) is further included: removing the extract of the fat solution prepared in step (3) to obtain a crude fat product.

[0041] As an optional mode, in the above-mentioned method for ultrasonically extracting crude fat from rice grains, the step (4) specifically includes: subjecting the fat solution prepared in step (3) to vacuum condensation and rotary evaporation at 40-60°C to remove the extracted liquid; then dry the produc...

Embodiment 2

[0047] The present invention is further described by following tests:

[0048] (1) Determination method of rice crude fat extraction rate:

[0049] Centrifuge the centrifuge tube after extraction at 5000rpm for 10 minutes, put the supernatant in a round bottom flask (bottle weight m 1 ), vacuum condensation and rotary evaporation at 40°C, and then bake the round bottom flask at 105°C to constant weight (m 2 ), the calculated crude fat content m 2 -m 1 .

[0050] At the same time, an equal amount of sample was taken according to the GB / T14772-93 method, and the crude fat of rice grain was extracted by Soxhlet extraction method, and the fat content was obtained as m 3 , then the fat extraction rate (m 2 -m 1 ) / m 3 .

[0051] (2) Extraction of rice crude fat:

[0052]Rice crude fat extraction: dry the rice grains until the water content is less than 10%, crush and pass through a 100-mesh sieve, weigh 2g of the sample in a 50ml centrifuge tube, add 16-30ml of extractant, ...

Embodiment 3

[0079] Such as figure 1 , 2 , Shown in 3, the embodiment of the present invention has adopted the ultrasonic extraction rice grain crude fat of optimization, and extraction process method comprises:

[0080] The rice grains are dried until the water content is less than 10%, crushed and passed through a 100-mesh sieve, and weigh ≥1.5g in a 50ml centrifuge tube. Add chromatographically pure grade n-hexane and mix evenly. The ratio of solid to liquid is 1g:8~15ml. Place it in an ultrasonic device with distilled water as the solvent, and extract for 37min at an ultrasonic power of 123W and a temperature of 42°C.

[0081] The crude fat extraction rate of rice grains under the ultrasonic method was 77.31%.

[0082] As a comparison, the same amount of sample was taken according to the GB / T14772-93 method, and the rice grain crude fat was extracted by the Soxhlet extraction method, and the extraction rate of the rice grain crude fat was the same as 77.31%. Soxhlet extr...

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Abstract

The invention discloses a method for ultrasonic extraction of rice grain crude fat, and belongs to the crop physiological technology research field. The method includes the steps: drying and crushing rice grains; taking a suitable amount of the powder sample, adding an extracting solution and fully mixing; under an ultrasonic condition, extracting the crude fat, making fat enter the extracting solution, then removing insoluble impurities, and thus obtaining a fat solution. The method can achieve high-efficiency extraction of the rice grain crude fat with less solvent amount, lower temperature and power and shorter time, not only is applies to a small amount of sample, but also can satisfy processing of mass samples.

Description

technical field [0001] The invention belongs to the field of crop physiological technology research, and in particular relates to a method for extracting rice grain crude fat. technical background [0002] At present, with the development of society, people's demand for rice products is getting higher and higher. With the continuous improvement of rice production, the requirements for rice quality have gradually become the subject of scientific research. Fat is one of the important components of rice, which has an important impact on the cooking and eating quality, nutritional quality and storage quality of rice. Although the fat content in rice is not high, most of them are high-quality unsaturated fatty acids such as oleic acid and linoleic acid, which are beneficial to the human body. Compared with protein and starch, they have higher energy. Increasing the fat content of rice can significantly improve Rice quality. At the same time, during the growth and storage of ri...

Claims

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Application Information

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IPC IPC(8): G01N1/28
Inventor 李天许光利丁春邦刘泉梁成刚黄鹏徐应杰江谷驰弘
Owner SICHUAN AGRI UNIV
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