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A kind of extraction method of luteolin in corn silk

A technology of luteolin and extraction method, applied in the direction of organic chemistry, etc., can solve the problems of insufficient extraction efficiency of luteolin, slow rupture of plant cell walls, uneven distribution of ultrasonic energy, etc., achieve accurate and reliable process parameters, and avoid complicated instruments. Depends on the effect of shortening the heating time

Inactive Publication Date: 2018-01-09
JILIN UNIV
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AI Technical Summary

Problems solved by technology

[0004] Traditional luteolin extraction methods mainly include leaching method, thermal reflux method, and Soxhlet extraction method. These extraction methods have certain disadvantages: large amount of solvent required, long reaction cycle, low extraction efficiency, high energy consumption, etc.
Although the ultrasonic extraction method has the characteristics of saving solvent, being suitable for the extraction of heat-sensitive substances, and the extraction method is convenient to operate, the process is simple, and it is easy to implement, but in the process of ultrasonic extraction, due to the uneven distribution of ultrasonic energy, only in a small area near the ultrasonic source The internal energy produces a cavitation effect, so compared with the microwave extraction method, the ultrasonic wave breaks the plant cell wall at a slower rate
It can be seen that there are obvious deficiencies in the extraction efficiency of luteolin in the existing single microwave extraction method or single ultrasonic extraction method.

Method used

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  • A kind of extraction method of luteolin in corn silk
  • A kind of extraction method of luteolin in corn silk
  • A kind of extraction method of luteolin in corn silk

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specific Embodiment approach

[0038] In order to further illustrate the technical solution of the present invention, in conjunction with the accompanying drawings, the specific implementation of the present invention is as follows:

[0039] The invention adopts microwave and ultrasonic waves to extract luteolin in corn silk in stages, takes the yield of luteolin as an evaluation index, and determines the process parameters of the microwave extraction stage and the ultrasonic extraction stage. The specific process route is as follows:

[0040] Raw material processing→microwave extraction→ultrasonic extraction→centrifugation→maize luteolin sample solution→decompression concentration→storage

[0041] The present invention adopts a microwave-ultrasound-assisted method for extracting corn silk luteolin. Firstly, the corn silk is cleaned, dried, pulverized, and sieved to obtain corn silk powder. Then add ethanol solution, fully shake and seal, first conduct microwave extraction, then ultrasonic extraction, and ...

Embodiment 1

[0043] a) Raw material handling:

[0044] Washing, drying, pulverizing and passing through a 60-mesh sieve of corn silk, and storing the prepared 60-mesh corn silk powder in a dry environment for subsequent use;

[0045] b) Microwave extraction:

[0046] Weigh 1.0 g of corn silk powder in step a), add a volume fraction of 74% ethanol solution according to the liquid-to-solid ratio of 28 mL / g, fully shake and seal, and use such as figure 1The microwave oven shown is for microwave extraction, the microwave power is adjusted to 231W, and the microwave time is set to 49s;

[0047] c) Ultrasonic extraction:

[0048] Put step b) the extract solution after microwave treatment into such as figure 2 In the KQ-250DB CNC ultrasonic cleaner shown above, ultrasonic extraction is performed, the ultrasonic temperature is adjusted to 58°C, the ultrasonic power is set to 200W, and the ultrasonic treatment time is 40 minutes;

[0049] Then centrifuge at 4000r / min for 15min to obtain corn l...

Embodiment 2

[0054] a) Raw material handling:

[0055] Washing, drying, pulverizing and passing through a 60-mesh sieve of corn silk, and storing the prepared 60-mesh corn silk powder in a dry environment for subsequent use;

[0056] b) Microwave extraction:

[0057] Weigh 1.0 g of corn silk powder in step a), add a volume fraction of 60% ethanol solution according to the liquid-to-solid ratio of 20 mL / g, fully shake and seal, and use such as figure 1 The microwave oven shown is for microwave extraction, the microwave power is adjusted to 231W, and the microwave time is set to 40s;

[0058] c) Ultrasonic extraction:

[0059] Put step b) the extract solution after microwave treatment into such as figure 2 In the KQ-250DB CNC ultrasonic cleaner shown above, ultrasonic extraction is performed, the ultrasonic temperature is adjusted to 50°C, the ultrasonic power is set to 200W, and the ultrasonic treatment time is 40 minutes;

[0060] Then centrifuge at 4000r / min for 15min to obtain corn ...

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Abstract

The invention relates to the technology of natural product extraction and particularly provides a method for extracting luteolin from corn stigma. Corn stigma is used as the raw material, and a microwave-ultrasonic assisted extraction technology is adopted to extract luteolin from the corn stigma. The microwave-ultrasonic assisted extraction technology is divided into two stages: the early stage adopts a microwave oven for microwave extraction and the later stage adopts an ultrasonic cleaner for ultrasonic extraction. The method provides a new technology for luteolin extraction; raw material sources are abundant, the extraction conditions are accurate and reliable, the extraction efficiency is high and the equipment is simple to operate; and the method reduces the production cost of luteolin and is favorable for the realization of industrial production of luteolin.

Description

technical field [0001] The invention relates to a method for extracting luteolin from corn silk, belonging to the technical field of natural product extraction. Background technique [0002] Corn silk is the style and stigma of corn, a grass plant, and is one of the commonly used Chinese medicinal materials in my country. Corn silk has a light taste and flat nature, and can be used as a raw material for various foods, health products and medicines. Calculus, acute and chronic nephritis, jaundice, measles and other diseases. Corn is the main food crop in my country, and its total output has exceeded 11 billion tons for many years. Therefore, as a by-product of corn, corn silk is rich in resources, cheap and easy to collect. At present, only a small amount of corn silk is developed and utilized, and most of them are discarded, resulting in a waste of resources. In order to increase the industrial added value of corn, corn silk, as a resource to be fully developed and utiliz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D311/30C07D311/40
CPCC07D311/30C07D311/40
Inventor 徐艳阳仇洋张铁华任辉霍冰洋刘辉具东虎王雪松孙竹
Owner JILIN UNIV
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