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Method for removing lead in ginkgo biloba extract (GBE)

A technology of ginkgo leaf and extract, applied in the field of lead removal from ginkgo leaf extract, can solve secondary S pollution and other problems, achieve the effect of reducing lead ions and increasing iron supplementation

Inactive Publication Date: 2012-07-04
皖南大鹏天然产物有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of hydrogen sulfide or sodium sulfide to remove lead will also lead to secondary S 2- Pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1. Water-soluble ginkgo leaf extract lead removal method: Add water to the ginkgo leaf extract obtained after heating and soaking in aqueous solution or other water-containing solvents, filtering, cooling, resin adsorption, elution, and desorption, and control its concentration at 20 -50%, add powdered FeS according to the ratio of 10-50mg / L of the conditioning solution, stir evenly, and put it in a refrigerator for 12-24h at 0-10°C, so that Fe can fully replace Pb in the ginkgo biloba extract liquid , Cd, Sn, Cu, Hg and other toxic heavy metal ions, use a filter press, a filter membrane with a filter hole of 0.01-5.00 μm, a filter bag, a filter paper, etc. Concentrate or concentrate and dry under normal pressure to obtain the ginkgo leaf extract product after lead removal. After testing: the lead ion content is 0.051ppm, the iron content is between 10-16ppm, and cadmium and copper ions are not detected.

Embodiment 2

[0009] Example 2. The method for removing lead from the dry crude ginkgo leaf extract obtained by the process of removing lead: in the dry crude product ginkgo leaf extract, add 1-5 times the concentration of 70% ethanol to dissolve first, then add water to adjust and control its concentration At 20-50%, add powdered FeS at a ratio of 10-50mg / L to the conditioning solution, stir evenly, and place it in a refrigerator for 12-24 hours at 0-10°C to fully replace Fe in the ginkgo biloba extract liquid After removing toxic heavy metal ions such as Pb, Cd, Sn, Cu, Hg, etc., use a filter press, a filter membrane with a filter hole of 0.01-5.00 μm, a filter bag, a filter paper, etc. to filter the sediment under reduced pressure or atmospheric pressure. Concentrate under reduced pressure or concentrate and dry under normal pressure to obtain the dry crude ginkgo leaf extract product after lead removal. After testing: the lead ion content is 0.051ppm, the iron content is between 10-16p...

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PUM

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Abstract

The invention discloses a method for moving lead in ginkgo biloba extract (GBE), comprising the following steps: heating and soaking ginkgo biloba in water solution or other aqueous solvents, filtering, cooling, absorbing resin, eluting, adding water in the desorbed ginkgo biloba extract solution to regulate and control the concentration at 20-50%, adding powder FeS according to the ratio of regulation solution of 10-50mg / L, stirring evenly, standing, filtering, concentrating and drying. The ginkgo biloba extract obtained by using the lead removal method of the invention is measured to have 0.051ppm of lead ion, 10-16ppm of iron and no cadmium ion and copper ion.

Description

technical field [0001] The invention relates to a method for removing lead from ginkgo leaf extract. Background technique [0002] At present, the extraction of Ginkgo biloba extract generally adopts steps such as heating an aqueous solution or heating and soaking in other aqueous solvents, filtering, cooling, resin adsorption, elution, desorption, concentration, and drying. Due to the contamination of solvents and equipment during the extraction of ginkgo biloba extract and the existence of trace lead ions contained in ginkgo biloba leaves, there is also a certain amount of lead ions in the final extract. It has been determined that the lead content in water-soluble ginkgo biloba extract products that have not been treated by the deleading process is about 5ppm. [0003] Lead ions are very harmful to the health of the human body: lead is absorbed into the blood circulation after entering the human body, and circulates mainly in the form of glycerophosphate protein complex ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L1/015A23L1/28A23L1/304A61K36/16A61K127/00A23L33/105
Inventor 叶宝兴方勇
Owner 皖南大鹏天然产物有限公司