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A deep eutectic solvent for extracting ginkgo leaf proanthocyanidins and its preparation method and extraction method

A deep eutectic solvent and proanthocyanidin technology, applied in the field of agricultural and forestry biological resources utilization, can solve the problems of high requirements for supercritical fluid extraction equipment, easy volatilization of organic solvents, and operator injury, etc., achieve excellent solubility and conductivity, and improve extraction The effect of low efficiency and cost

Active Publication Date: 2019-07-02
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic solvents are volatile, easily pollute the environment, and cause harm to operators; supercritical fluid extraction equipment requires high requirements and high investment costs

Method used

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  • A deep eutectic solvent for extracting ginkgo leaf proanthocyanidins and its preparation method and extraction method
  • A deep eutectic solvent for extracting ginkgo leaf proanthocyanidins and its preparation method and extraction method
  • A deep eutectic solvent for extracting ginkgo leaf proanthocyanidins and its preparation method and extraction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Take by weighing the two components choline chloride and malonic acid of the deep eutectic solvent according to the molar ratio of 1:2.5 and mix them uniformly, heat and stir at 110° C. until a transparent liquid is formed;

[0043] (2) After the transparent liquid is formed, it is stored at 45° C. overnight. It is observed that the liquid has no solid precipitation, and the obtained deep eutectic solvent can be used for the extraction of ginkgo leaf proanthocyanidins.

Embodiment 2

[0045] (1) Take two components of deep eutectic solvent, choline chloride and malonic acid, and mix them uniformly according to a molar ratio of 1:2, and heat and stir at 100° C. until a transparent liquid is formed;

[0046] (2) After the transparent liquid is formed, it is stored at 50° C. overnight, and the liquid is observed without solid precipitation, and the obtained deep eutectic solvent can be used for the extraction of ginkgo biloba proanthocyanidins.

Embodiment 3

[0048] (1) Take two components of deep eutectic solvent, choline chloride and malonic acid, and mix them uniformly according to a molar ratio of 1:1.5, and heat and stir at 80°C until a transparent liquid is formed;

[0049] (2) After the transparent liquid is formed, it is stored at 45° C. overnight. It is observed that the liquid has no solid precipitation, and the obtained deep eutectic solvent can be used for the extraction of ginkgo leaf proanthocyanidins.

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Abstract

The invention discloses a deep eutectic solvent (DESs) for extracting procyanidine of gingko leaves, a preparation method of the deep eutectic solvent and an extraction method. The deep eutectic solvent is prepared from choline chloride and malonic acid in a molar ratio of 1 to (1-2.5). The prepared deep eutectic solvent is an environment-friendly solvent, is safe and free of pollution, can be repeatedly utilized and is easily biodegraded; furthermore, the preparation process is simple and low in cost, and the deep eutectic solvent has the properties of low steam pressure, incombustibility, excellent solubleness and electrical conductivity and stable electrochemical window and the like; and meanwhile, the prepared deep eutectic solvent is low in viscosity and good in fluidity, and a hydrogen bond is stable. According to the method for extracting the procyanidine of the gingko leaves by virtue of the deep eutectic solvent, the extraction time is shortened, the operation is safe, and noharm is caused to the environment and a human body. The preparation method of the deep eutectic solvent is simple and convenient, wide in raw material source, low in cost and high in biodegradability.

Description

technical field [0001] The invention relates to utilization of agricultural and forestry biological resources, in particular to a deep eutectic solvent for extracting ginkgo leaf proanthocyanidins, a preparation method and an extraction method thereof. Background technique [0002] Ginkgo biloba (scientific name: Ginkgo biloba L.), also known as Gongsun tree and ginkgo, belongs to gymnosperm, Ginkgo family Ginkgo genus, single genus and single species. Ginkgo biloba, fruit, etc. have medicinal development value, and are known as living fossils full of treasures. Ginkgo is native to my country, and my country's ginkgo resources account for more than 70% of the world's total. Ginkgo biloba has a variety of natural active ingredients with medicinal value, mainly flavonoids, terpene lactones, polyprenyl alcohols, phenolic acids, proanthocyanidins, etc. Ginkgo biloba extract (GBE) has a unique curative effect in the treatment of cerebral thrombosis, coronary heart disease, brai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D311/62B01D11/02
CPCB01D11/0288C07D311/62
Inventor 苏二正曹君曹福亮李默涵梅娜娜汪贵斌段绪果
Owner NANJING FORESTRY UNIV
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