Method for extracting total flavonoids from sunflower disc at flowering period by adopting supercritical CO2 extraction
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An extraction method, a technology of total flavonoids, applied in the direction of solid solvent extraction, etc., to achieve the effect of simple method, saving reagents, and easy operation
Active Publication Date: 2015-06-10
LANZHOU INST OF ANIMAL SCI & VETERINARY PHARMA OF CAAS
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[0004] So far, no supercritical CO 2 A report on extraction of total flavonoids from sunflower discs at flowering stage
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Embodiment 1
[0053] A supercritical CO 2 The method for extracting the total flavonoids in the flower disc of sunflower at the flowering stage comprises the following steps:
[0054] (1) After the sunflower discs in the flowering period are naturally dried, they are crushed and passed through a 200-mesh sieve;
[0055] (2) Put it into the extraction kettle, with CO 2 The fluid is an extractant, the extraction temperature is 60° C., the extraction pressure is 40 MPa, and the extraction time is 2 hours to obtain a light yellow extract of total flavonoids.
Embodiment 2
[0057] A supercritical CO 2 The method for extracting the total flavonoids in the flower disc of sunflower at the flowering stage comprises the following steps:
[0058] (1) After the sunflower discs in the flowering period are naturally dried, they are crushed and passed through a 200-mesh sieve;
[0059] (2) Put it into the extraction kettle, with CO 2 The fluid is the extractant, the extraction temperature is 40° C., the extraction pressure is 40 MPa, and the extraction time is 1.5 h, to obtain a light yellow extract of total flavonoids.
Embodiment 3
[0061] A supercritical CO 2 The method for extracting the total flavonoids in the flower disc of sunflower at the flowering stage comprises the following steps:
[0062] (1) After the sunflower discs in the flowering period are naturally dried, they are crushed and passed through a 200-mesh sieve;
[0063] (2) Put it into the extraction kettle, with CO 2 The fluid is an extractant, the extraction temperature is 60° C., the extraction pressure is 20 MPa, and the extraction time is 2.5 hours to obtain a light yellow extract of total flavonoids.
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Abstract
The invention discloses a method for extracting total flavonoids from a sunflower disc at a flowering period by adopting supercritical CO2 extraction. The total flavonoids are extracted by adopting a CO2 fluid as an extracting agent. With the sunflower disc at the flowering period as an extracting raw material, extraction and separation of the total flavonoids are carried out by the supercritical CO2 extraction method. The method has the characteristics of being simple and convenient to operation, simple, and high in extraction efficiency. Supercritical CO2 extraction is characterized in that nontoxic CO2 without a residue adopted as an extracting solvent instead of water or an organic solvent, and can be performed under the condition close to the room temperature; high-selectivity extraction and separation can be realized, so as to obtain a high-quality product; no three wastes are generated by supercritical CO2; the method is extremely beneficial to environmental protection; the extracting material CO2 is cheap and available, and can be recycled, so that the production cost is relatively low.
Description
technical field [0001] The invention relates to a method for total flavonoids in sunflower discs in the flowering stage, and belongs to the field of natural product separation. Background technique [0002] Due to the various structures of flavonoids, the solvents and extraction methods used for extraction are also different. Generally, organic solvents such as methanol, ethanol, and acetone are used for extraction. Before extraction, fat-soluble compounds such as petroleum ether can be used to remove fat-soluble compounds, or water-soluble substances such as proteins and polysaccharides can be removed by alcohol precipitation. The extraction of flavonoids assisted by microwave and ultrasonic waves can significantly increase the yield and greatly save time. [0003] Flavonoids cannot be directly synthesized in the human body and can only be obtained from food. Therefore, the research on extracting natural flavonoids with high purity and strong activity from different green ...
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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/02
Inventor 郝宝成刘宇梁剑平高旭东王学红陶蕾郭文柱尚若锋杨珍
Owner LANZHOU INST OF ANIMAL SCI & VETERINARY PHARMA OF CAAS
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