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Rapid extraction method utilizing microwave radiation

A technology of microwave radiation and extraction method, which is applied in the preparation of test samples, sampling devices, etc., can solve problems such as time-consuming and complicated operations that cannot be solved

Active Publication Date: 2008-10-22
FOOD IND RES & DEV INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the above technologies can solve the shortcomings of traditional extraction methods such as time-consuming, complicated operation and the need to use a large amount of solvents.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Example 1: Plantain

[0026] Table 1 shows the amount of ursolic acid extracted from each kilogram of plantain treated by different extraction methods. The amount of ursolic acid in plantain is analyzed by HPLC after the quantitative extract is dissolved, wherein the absorbance value of the sample at 205nm is detected with a UV detector, the mobile phase adopts a gradient method, the initial concentration is 50% methanol, and the flow rate is 1 ml / min, flow washing for 68 minutes, and the final concentration is 100% methanol. The content of ursolic acid in the extract was calculated after comparison with the standard.

[0027] Table 1

[0028] experiment

[0029] As shown in Table 1, since ursolic acid is alcohol-soluble, its effect of using alcohol as the extraction solvent is better, so whether it is extraction by heat reflux or ultrasonic extraction, when the extraction solvent is alcohol (experiments 1-3, 1- 4), the content of ursolic acid extracted by ...

example 2

[0030] Example 2: lotus leaf

[0031] Table 2 shows the amount of nuciferine extracted from each kilogram of lotus leaves after the lotus leaves were treated by different extraction methods. The amount of nuciferine in the lotus leaf is analyzed by HPLC after the quantitative extract is dissolved, wherein the absorbance value of the sample at 265nm is detected with a UV detector, the mobile phase adopts a gradient method, the initial concentration is 100% water, and the flow rate is 1 ml / min, flow wash for 20 minutes, the final concentration is 100% methanol. The content of nuciferine in the extract is represented by the area under the curve (Area Under Curve, AUC) of the HPLC of nuciferine.

[0032] Table 2

[0033] experiment

[0034] Nuciferine is a water-soluble substance, so the effect of using water as an extraction solvent is better. It is found from experiments 2-1 and 2-2 that under the same conditions, when alcohol and water are used as extraction solvents...

example 3

[0035] Example 3: Schisandra

[0036] Table 3 shows the amount of schisandrin extracted from Schisandra chinensis per kilogram after processed by different extraction methods. The amount of schisandrin in Schisandra chinensis is analyzed by HPLC after the quantitative extract is dissolved, wherein the absorbance value of the sample at 280nm is detected with a UV detector, the mobile phase adopts a three-stage gradient method, the initial concentration is 60% methanol, and the flow rate is Flow washing at 1 ml / min for 20 minutes, then increase the methanol concentration to 100% in a gradient manner, then maintain 100% methanol flow washing for 12 minutes, and then flow washing for 12 minutes, reduce the methanol concentration to 60% in a gradient manner, The final concentration was returned to 60% methanol. The content of schisandrin in the extract is calculated after comparing with the standard.

[0037] table 3

[0038] experiment

[0039] The schisandrin contain...

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PUM

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Abstract

The invention provides a quick extraction method, wherein, raw materials are extracted through microwave radiation treatment before the process of solvent extraction, so as to accelerate the extraction speed.

Description

technical field [0001] The invention relates to a method for shortening the extraction time, even increasing the extraction amount and reducing the amount of extraction solvent used by using microwave treatment. Background technique [0002] Today, when speed and efficiency are highly valued, efficient and simple extraction methods have become an important research direction. Currently widely used extraction methods include Soxhlet extraction, ultrasonic extraction, supercritical extraction and other methods. These extraction methods have their advantages in different extraction materials and samples. However, both Soxhlet extraction and ultrasonic extraction require the use of a large amount of solvent and take a long time; although supercritical extraction requires less time and solvent, its equipment is more complicated and its operation cost is higher, so its application is also limited. restricted. [0003] Microwave extraction was early used in the extraction of tra...

Claims

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Application Information

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IPC IPC(8): G01N1/44G01N1/28G01N1/02
Inventor 林福文陈昭平黄荣丞杨炳辉蔡维钟
Owner FOOD IND RES & DEV INST
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