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Method for removing pesticide residue in plant extract

A technology for residual pesticides and ginkgo biloba, applied in separation methods, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as difficult to deal with and inability to remove residual pesticides, and achieve the effect of low pesticide residue content

Inactive Publication Date: 2012-12-05
浙江绍兴东灵保健食品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above method can remove a large part of residual pesticides in plant extracts, but for some residual pesticides and the molecular size of the active ingredient is not much different, then Difficult to process, therefore, still causing some residual pesticides that cannot be removed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: Adopt common adsorption resin to remove pesticide residue in Ginkgo biloba extract

[0020] Add the extracted ginkgo leaf extract containing pesticide residues to an ethanol solution with a mass percentage of 30% to 70% to prepare a column liquid, collect the effluent after being adsorbed by the adsorption resin, and detect the pesticide residue content in the effluent .

Embodiment 2

[0021] Example 2: Using high-speed centrifugation + resin adsorption to remove pesticide residues in Ginkgo biloba extract

[0022] Step 1. Send the leached ginkgo leaf extract into a high-speed centrifuge, perform high-speed centrifugation at a speed of 14,000 rpm, and collect the supernatant after centrifugation;

[0023] Step 2. The ginkgo leaf extract after centrifugation in step 1 is directly put into the macroporous adsorption resin for adsorption, then the effluent is collected, and the residual pesticide content in the effluent is detected.

Embodiment 3

[0024] Example 3: Using high-speed centrifugation + resin adsorption + vacuum distillation to remove pesticide residues in Ginkgo biloba extract

[0025] Step 1. Send the leached ginkgo leaf extract into a high-speed centrifuge, perform high-speed centrifugation at a speed of 14,000 rpm, and collect the supernatant after centrifugation;

[0026] Step 2, the ginkgo leaf extract after centrifugation in step 1, directly enters the macroporous adsorption resin for adsorption, and collects the target product after analysis;

[0027] Step 3. Concentrate the target product analyzed in step 2 to a specified concentration (effective solid content 25-30%), then add water 2-3 times the volume of the concentrated solution in batches, and vacuum at -0.04--0.095Mpa Under certain conditions, heat to 60-70°C, distill off the remaining pesticide residues under reduced pressure, detect the pesticide residue content in the concentrated solution, and transfer to the spray drying process after rea...

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PUM

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Abstract

The invention discloses a method for removing pesticide residue in ginkgo leaf extract, belonging to the field of plant extracting technology. The method comprises the following steps of: 1, delivering extracted ginkgo leaf extracting solution to a high speed centrifuge for high speed centrifugation at the speed of 14000r / min, and then collecting supernatant; 2, delivering ginkgo leaf extracting solution centrifuged in the step 1 directly to macroporous adsorption resin for adsorption, resolving and then collecting target products; 3, concentrating the target products resolved in the step 2 to a set concentration, then adding the target products in batches to water the volume of which is 2 to 3 times as much as concentrated solution, heating to 60 to 70 DEG C under the vacuum condition of -0.04 to -0.095MPa, distilling the pesticide residue at reduced pressure, and then performing spray drying treatment when the set concentration is reached. The method is not limited by the molecular dimension of pesticide residues and effective ingredients and realizes the reduction of the content of various pesticide residues to a large extent.

Description

technical field [0001] The invention relates to a method for removing residual pesticides in ginkgo leaf extracts, belonging to the technical field of plant extraction. Background technique [0002] At present, in agricultural production, the pesticide residues in agricultural products have become an important indicator affecting the quality of agricultural products, and the extracts or extracts obtained from agricultural products have seriously affected the quality and price due to the content of pesticide residues. At present, for the export of agricultural products and their extracts, developed countries such as the United States and the European Union have set very strict pesticide residue standards. Therefore, how to reduce the pesticide residues in agricultural products, especially in extracts, is an urgent problem to be solved. [0003] In the Chinese patent applications whose application number is 200610013224.1 and application number 200910228677.X, a method for sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D15/08B01D21/26B01D17/038B01D3/10
Inventor 应维强应维潮应浩应诗雨
Owner 浙江绍兴东灵保健食品有限公司
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