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A method for removing residual pesticides in ginkgo extract

A technology of Ginkgo biloba extract and residual pesticides is applied in the directions of medical raw materials and food science derived from Ginkgo biloba to achieve the effect of easy operation, simple method and solving the large amount of pesticide residues.

Active Publication Date: 2016-08-31
JIANGSU BESCON PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, Japan implements a registration system for pesticides. Once a certain pesticide is confirmed to be harmful to humans and animals, the government will restrict or prohibit the sale and use of pesticides.

Method used

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  • A method for removing residual pesticides in ginkgo extract

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for removing residual pesticides in ginkgo extract, characterized in that it comprises the following steps:

[0023] (1) Step 1: Send 100L of extracted Ginkgo biloba extract into a high-speed centrifuge, perform high-speed centrifugation at a speed of 8000 rpm, and collect the supernatant after centrifugation;

[0024] (2) Step 2: Add 2kg of activated carbon and 2kg of acidic aluminum oxide to the supernatant, select a mixed solvent containing 81.25L of ethanol, 12.5L of ethyl acetate and 6.25L of glycerol for extraction, and collect the extract by filtration Concentrate to obtain 25L of concentrated solution, then add No. 6 solvent oil to the obtained concentrated solution to reflux and extract twice, then concentrate once and then dry;

[0025] (3) Step 3: Combine the extracts, ultrafiltration: combine the extracts, place them at room temperature for 4 hours, absorb the supernatant, filter with bamboo charcoal fiber cloth, and then use ceramic membrane ultraf...

Embodiment 2

[0028] A method for removing residual pesticides in ginkgo extract, characterized in that it comprises the following steps:

[0029] (1) Step 1: Send 100L of extracted Ginkgo biloba extract into a high-speed centrifuge, perform high-speed centrifugation at a speed of 11900 rpm, and collect the supernatant after centrifugation;

[0030] (2) Step 2: Add 2kg of calcium carbonate and 2kg of acidic aluminum oxide to the supernatant, select 100L of ethanol for extraction, collect the extract by filtration and concentrate to obtain 20L of concentrated solution, and add No. 6 to the obtained concentrated solution The solvent oil is refluxed twice, then concentrated and dried once;

[0031] (3) Step 3: Combine the extracts, ultrafiltration: Combine the extracts, place them at room temperature for 4.5 hours, absorb the supernatant, filter with bamboo charcoal fiber cloth, and then use ceramic membrane ultrafiltration to collect the ultrafiltrate;

[0032] (4) Step 4: Filter the ginkgo ...

Embodiment 3

[0034] A method for removing residual pesticides in ginkgo extract, characterized in that it comprises the following steps:

[0035] (1) Step 1: Send 100L of extracted Ginkgo biloba extract into a high-speed centrifuge, perform high-speed centrifugation at a speed of 8500 rpm, and collect the supernatant after centrifugation;

[0036] (2) Step 2: Add 4kg of acidic aluminum oxide to the supernatant, select a mixed organic solvent containing 85L of ethanol and 15L of ethyl acetate for extraction, filter and collect the extract and concentrate to obtain 17L of concentrated solution. Add No. 6 solvent oil and reflux extraction twice, then concentrate once and then dry;

[0037] (3) Step 3: Combine the extracts, ultrafiltration: Combine the extracts, place them at room temperature for 3.5 hours, absorb the supernatant, filter with bamboo charcoal fiber cloth, and then use ceramic membrane ultrafiltration to collect the ultrafiltrate;

[0038] (4) Step 4: Filter the ginkgo leaf ext...

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Abstract

The invention relates to a method for removing residual pesticide in ginkgol biloba extract. The method for removing residual pesticide in ginkgol biloba extract comprises the following steps: successively extracting for three times by adopting organic solvents with different weight multiples and different weight percentage concentrations, then carrying out ultrafiltration by adopting an ultrafiltration ceramic membrane, and finally enabling ultrafiltrate to pass through ADS-4 screening adsorption resin, so that content and purity of the obtained ginkgol biloba extract are high. The method for removing the residual pesticide in the ginkgol biloba extract is simple and easy to operate. Acid aluminium oxide and ADS-4 have strong selective action. The method for removing residual pesticide in ginkgol biloba extract has the advantage that the defects of the traditional technological process that amount of pesticide residue in the produced ginkgol biloba extract is large and nutritional ingredients are lost are overcome.

Description

technical field [0001] The invention belongs to the field of plant extraction, and in particular relates to a method for removing residual pesticides in ginkgo extracts. Background technique [0002] Pesticide residues are the general term for trace pesticide precursors, toxic metabolites, degradation products, and impurities that remain in organisms, crops, soil, water, and the atmosphere without being decomposed within a period of time after pesticide use. Some of the pesticides applied to crops are attached to the crops, some are scattered in the soil, air and water environment, and some of the pesticides remaining in the environment will be absorbed by plants. Pesticide residues reach humans and animals directly through plant fruits, water, and air, or pass through the environment and food chain to humans and animals. [0003] Some of the currently used pesticides can be biodegraded into harmless substances in a short period of time, while organochlorine pesticides incl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K36/16A23L33/105A23L5/20A23L33/00
Inventor 樊恩生刘鹏程樊子豪
Owner JIANGSU BESCON PHARMA