Method for removing residual pesticide from ginseng

A technology of residual pesticides and ginseng, which is applied in the direction of pharmaceutical formulas, drug combinations, and medical preparations containing active ingredients, etc., can solve the problems of large equipment investment, high operating cost, and high operating pressure, and achieve low energy consumption in equipment investment and operation , Reduce the amount of solvent and energy consumption, and the effect of low equipment requirements

Inactive Publication Date: 2010-08-25
QINGDAO DONGREN BIO MEDICAL TECH
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

In terms of effective removal of pesticide residues in ginseng, the traditional methods for removing pesticide residues in Chinese herbal medicines mainly include water washing and processing, and the results are not ideal.
Chinese patents 00134340.8 and 200510014554.8 respectively disclose CO 2 It is a method of purifying and removing residual pesticides in ginseng as a solvent, water, ethanol, etc. as entraining agents. These methods have a certain effect on removing organochlorine pesticides in ginseng, but there are high operating pressures, large equipment investment, and operational problems. Disadvantages such as high cost, and because ginsenosides are easily soluble in ethanol, using ethanol as an entrainer will cause unnecessary loss of ginsenosides
Chinese patent 200710122559.1 discloses a method for purifying and removing residual pesticides in ginseng using propane as a solvent. Although the effect of removing residual pesticides is remarkable, propane is a flammable and explosive gas, which requires high explosion-proof equipment and operation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 100g ginseng powder as raw material, use R134a as solvent, carry out static extraction at 50°C and 6.0 MPa for 90 min, and then perform dynamic extraction for 20 min. The mass ratio of R134a to raw ginseng is 1:1, and the pressure of the separation tank is 0.5 MPa. Separation kettle temperature is 40 ℃, by measuring the content of pesticide residues and ginsenosides of ginseng before and after removing pesticide residues by using the same method, measuring organochlorine (OCPs) pesticide residue removal rate can reach 95.2%, after extraction, the content of ginsenoside Rb1 The loss was at 1.4%.

Embodiment 2

[0021] Use 500g ginseng extract as raw material, use R134a as solvent, conduct static extraction at 80°C and 2.0 MPa for 60 minutes, and then perform dynamic extraction for 30 minutes. The mass ratio of R134a to raw ginseng is 8:1, and the pressure of the separation tank is 0.5 MPa , the separation kettle temperature is 50 ℃, by measuring the content of pesticide residues and ginsenosides of ginseng before and after removing pesticide residues in the same method, the measured organochlorine (OCPs) pesticide residue removal rate can reach 92.9%, after extraction, ginsenoside Rb1 The loss was at 0.9%.

Embodiment 3

[0023] With 500g American ginseng powder as raw material and R134a as solvent, static extraction was carried out at 50°C and 4.0 MPa for 30 minutes, and then dynamic extraction was carried out for 40 minutes. The mass ratio of R134a to raw material ginseng was 3:1, and the pressure of the separation tank was 0.2 MPa. The temperature of the separation tank is 30°C. By measuring the content of pesticide residues and ginsenosides in ginseng before and after the removal of pesticide residues by the same method, the removal rate of organochlorine (OCPs) pesticide residues can reach 86.3%, and the ginsenosides have almost no loss.

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Abstract

The invention belongs to the technical field of removal of residual chemical compositions from plants, and relates to a method for removing residual pesticide from ginseng by supercritical 1,1,1,2-tetrafluoroethane extraction technology. The method comprises the following steps of: crushing and sieving a raw material ginseng, filling the powder into an extraction cauldron, removing system air, and injecting an extracting solvent into the extraction cauldron; adjusting the subcritical extraction pressure to between 0.6 and 10MPa, and controlling the temperature to between 30 and 80 DEG C and the extracting time to between 40 and 180 minutes; making R134a containing the pesticide composition enter a separation kettle from the extraction cauldron under reduced pressure to complete separation, separating out the extracting solvent and an extract pesticide, and recycling the solvent; and after the extraction, drying the obtained raffinate to obtain a pure ginseng product. The method has the advantages of low requirement on equipment, low equipment investment and energy consumption in operation, wide applicable range, obviously low solvent consumption, high recovery rate of the solvent and environmental protection.

Description

Technical field: [0001] The invention belongs to the technical field of removing residual chemical components in plants, and relates to a method for removing residual pesticides in ginseng by using super (sub)critical 1,1,1,2-tetrafluoroethane (R134a) extraction technology, It can effectively remove residual pesticides in ginseng, especially organochlorine pesticide components, and will not cause damage and loss of active components of ginseng. Background technique: [0002] Ginseng (Panax ginseng C.A. Meyer) is the rhizome of Araliaceae. Panax means longevity and cures all diseases. Its application history can be traced back to more than 2,000 years ago. The earliest pharmacy monograph "Shen Nong Baicao Jing" in China has a detailed discussion on the medicinal value of ginseng. It has a wide range of effects and enjoys the reputation of "the king of all herbs and the first of all medicines". Modern pharmacological research shows that ginseng can effectively regulate the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K36/258A61P1/14A61P39/00A61P25/00A61P9/00A61K125/00
Inventor 韩玉谦李森
Owner QINGDAO DONGREN BIO MEDICAL TECH
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