Method for removing pesticide residues from ginseng extract

A technology for extracting ginseng and pesticide residues, which is applied in the direction of pharmaceutical formulas, plant raw materials, and medical preparations containing active ingredients, etc. It can solve the problems of high organic solvent residues, large equipment investment, and high operating costs, so as to avoid transfer losses, Ease of operation, effect of reducing layer separation loss

Inactive Publication Date: 2020-08-18
ZHEJIANG TIANCAO BIOTECHNOLOGY CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The pesticide residues in ginseng are mainly organochlorine, organophosphorus and pyrethroids. These residual components are easily soluble in organic solvents but not in water. Therefore, the easiest way to remove pesticide residues in ginseng is to repeatedly extract them with organic solvents. , but this method has the problems of low recovery rate and high residual organic solvent, and poor practicability
A relatively new method that has emerged in recent years is the use of supercritical CO 2 Extraction, as disclosed in CN200510014554.8, uses CO as a solvent and ethanol as an entraining agent to purify and remove the residual pesticides in ginseng. This method has high removal rate, clean and pollution-free, and high efficiency, but there are operational Disadvantages such as high pressure, large equipment investment, and high operating costs

Method used

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  • Method for removing pesticide residues from ginseng extract

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for removing pesticide residues from ginseng extracts, comprising the following steps:

[0034] S1. Dissolving: add 35mL water and 65mL 100% ethyl acetate to 100g ginseng crude extract, stir to raise the temperature to above 80°C, keep it warm for 20min, keep stirring during the period, and the stirring speed is 120r / min;

[0035] S2. Extraction: Slowly add 1000mL of 97% ethyl acetate; continue to stir for 2h, and then let it stand for 2h. When the organic layer and the water layer are clearly separated, release the organic layer and continuously extract six times; add 50mL of water to dissolve the bottom layer Extract the extract and stir it evenly, and the organic layer is recycled in the solvent recovery tower to remove high pesticide residue components by distillation;

[0036] S3. Concentration: Use a concentrator to remove the residual organic solvent in the bottom extract. The vacuum degree of concentration is -0.08 mPa, and the concentration temperature...

Embodiment 2

[0040] A method for removing pesticide residues from ginseng extracts, which is basically the same as in Example 1, except that: step S2 extracts each time, when the organic layer is released, a part of the organic layer is kept in the extraction device, subject to the fact that the liquid level of the bottom extract is not exposed; After releasing the organic layer during the last extraction, add water slowly along the inner wall of the extraction device until the thickness of the water layer reaches 1cm, and let it stand for 5 minutes. The retained organic layer moves from the surface of the extract to the surface of the water layer, and then the organic layer can be released, which improves the removal level of the organic layer without causing loss to the extract; then add 50mL to dissolve the bottom extract.

Embodiment 3

[0042] A method for removing pesticide residues from ginseng extracts, which is basically the same as in Example 1, except that in step S4, after the concentrated solution is passed through the macroporous resin, water having the same volume (50 mL) as the concentrated solution is passed through the macroporous resin, and then flows out The liquid is collected together.

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Abstract

The invention belongs to the technical field of plant residual pesticide removal. The invention particularly discloses a method for removing pesticide residues from a ginseng extract. The method comprises the steps: dissolving, extracting, concentrating, purifying, concentrating and drying; a ginseng extract is extracted for at least six times by using 97% or more of an organic solvent, and pesticide residues are adsorbed by using resin for fine purification, so that the removal rate of the pesticide residues can reach 99.9% or more, the European standard and the American standard are met, theoperation is simple, the cost is low, and the control is easy. The ginseng crude extract is made into extractum during extraction, an upper organic layer is discharged after layering, loss of the ginseng extract is effectively reduced, the recovery rate is increased, and the recovery rate is 70% or above; 100% of organic solvent is added during dissolution for pre-removal, so that the extractioneffect is improved; organic solvent residues are effectively removed through two-step concentration. In addition, the organic solvent can be recycled after being extracted, so that time and reagent consumption cost are greatly saved.

Description

technical field [0001] The invention belongs to the technical field of removing pesticide residues in plants, and in particular relates to a method for removing pesticide residues from ginseng extracts. Background technique [0002] With the development of agricultural industrialization, the production of agricultural products is increasingly dependent on exogenous substances such as antibiotics and organic pesticides, and the large-scale use of pesticides will inevitably lead to the problem of excessive pesticide residues in agricultural products, affecting the food safety of consumers, and in serious cases. consumer life. In addition, many countries have strict restrictions on the amount of pesticide residues in natural plant products. Excessive pesticide residues directly affect the export of products and cause trade problems. [0003] Ginseng is an Araliaceae plant. It is a kind of precious Chinese medicinal material. It is known as the "King of Herbs". The main active...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/258
CPCA61K36/258A61K2236/331A61K2236/51A61K2236/55
Inventor 黄孟乔邵云东程勇
Owner ZHEJIANG TIANCAO BIOTECHNOLOGY CO LTD
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