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Identification method for effective components in ginkgo leaf preparation

A technology of active ingredients and ginkgo biloba, applied in the field of drug analysis, can solve the problems of inability to judge the accuracy of identification, no atlas proof, and influence on the analysis results, so as to facilitate qualitative analysis and quality control, improve thin-layer chromatographic conditions, good separation effect

Active Publication Date: 2016-12-21
HANGZHOU CONBA PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the boundaries between the spots are fuzzy, trailing, and line-like, indicating that the separation effect is poor, which is not conducive to identification, and it is difficult to carry out qualitative analysis and quality control of the active ingredients in the ginkgo biloba preparation.
The disadvantage of this method is that this method cannot separate the active ingredients in Ginkgo biloba extract, and the inspection results after spotting only show the main spots, which only indicate that the product contains Ginkgo biloba extract, and the degree of differentiation is poor.
The disadvantage of this method is that in the implementation case, only the text description and inspection results show that there are 8 yellow spots, and there is no atlas proof, so the accuracy of the identification cannot be judged
The weak point of this method is: as can be known from the developing agent screening result of embodiment 6, only when adopting stationary phase: 0.4% sodium acetate sodium carboxymethyl cellulose solution is the silica gel G plate of binding agent, developing agent: acetic acid When ethyl ester-butanone-methanol-water (5:3:1:1), the separation effect of total flavonol glycosides is clear, but there is a defect of edge effect
The disadvantage of this method is that due to the difference in the polarity of the substance, the choice of developing agent will make the concentration at the two edges of the thin-layer plate lower than that in the middle, resulting in inappropriate ratio shift, affecting the development and analysis results, and is not conducive to qualitative analysis. analyze

Method used

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  • Identification method for effective components in ginkgo leaf preparation
  • Identification method for effective components in ginkgo leaf preparation
  • Identification method for effective components in ginkgo leaf preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The identification method of the active ingredient of embodiment 1 ginkgo biloba preparation

[0032] (1) Preparation of the test product: Take an appropriate amount of ginkgo biloba preparation to be tested (approximately equivalent to 48 mg of total flavonol glycosides), add 15 ml of n-butanol to extract, soak in temperature for 15 minutes and shake from time to time, let cool, filter, and the filtrate is evaporated Dry, add 2ml of ethanol to the residue to dissolve it, and use it as the test solution;

[0033] (2) Preparation of reference substance: take an appropriate amount of ginkgo biloba reference preparation (about 0.2mg), add 15ml of n-butanol to extract, soak in temperature for 15 minutes and shake from time to time, let cool, filter, evaporate the filtrate to dryness, add 2ml of ethanol to the residue to make Dissolved as a reference substance solution;

[0034] (3) Thin-layer chromatography: absorb 3 μ l of the test solution and the reference solution, and...

Embodiment 2

[0036] The identification method of the active ingredient of embodiment 2 ginkgo biloba preparation

[0037] In this example, the conditions of thin-layer chromatography were changed to: sample volume is 10 μl, developer is ethyl acetate-isopropanol-methanol-water=4:9:0.5:2, color developer is 5% Aluminum trichloride ethanol solution, all the other identification steps refer to Example 1.

[0038] The inspection results clearly showed 3 spots.

Embodiment 3

[0039] The identification method of the active ingredient of embodiment 3 ginkgo biloba preparation

[0040] In this example, the conditions of thin-layer chromatography were changed to: sample volume is 1 μl, developer is ethyl acetate-isopropanol-methanol-water=1:6:1:1, color developer is 1% Aluminum trichloride ethanol solution, all the other identification steps refer to Example 1.

[0041] The inspection results clearly showed 3 spots.

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Abstract

The invention discloses an identification method for the effective components in a ginkgo leaf preparation. The identification method comprises: (1) preparing a testing product: taking a proper amount of a ginkgo leaf preparation to be detected, adding n-butanol, extracting, filtering, evaporating the filtrate, and adding ethanol to the residue to dissolve so as to be adopted as the testing product solution; (2) preparing a reference substance solution: taking a proper amount of a ginkgo leaf reference preparation, and preparing the reference substance solution according to the step (1); and (3) carrying out thin layer chromatography: respectively sucking 1-10 [mu]lt of the testing product solution and the reference substance solution, respectively spotting on the same silica gel G plate, developing with an ethyl acetate, isopropyl alcohol, methanol and water mixture, taking out the thin plate, carrying out air drying, spraying a 1-5% aluminum chloride ethanol solution, placing in a 365 nm ultraviolet light lamp, viewing the fluorescence, and observing the spot. According to the present invention, with the identification method, the good separation effects of various effective components are good, the spots are clear, the Rf value is moderate, various effective components can be accurately identified, and the qualitative analysis and quality control are easily achieved.

Description

technical field [0001] The invention relates to the technical field of drug analysis, in particular to a method for identifying active ingredients in ginkgo leaf preparations, mainly through thin-layer chromatography to qualitatively analyze the active ingredients in ginkgo leaf preparations, especially flavonoids. Background technique [0002] Ginkgo biloba (Ginkgo Biloba) is the oldest existing seed plant in the world, and it is also the only survivor of the Ginkgo family dating back to the Permian period more than 200 million years ago. The herbal extract of Ginkgo biloba is used for drug treatment in China and many countries, and its medicinal value is very high. Various pharmacological activities such as peripheral blood circulation, lowering serum cholesterol and auxiliary anticancer. Flavonoid glycosides and terpenoid lactones in Ginkgo biloba are the main components that produce the above pharmacological activities, and they are also the main active ingredients and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/90
CPCG01N30/90
Inventor 徐春玲徐秀卉姚丽萍宋远征陈玲芳蒋国潮宋丹丹徐蓉何煜徐鹏鹤金晓
Owner HANGZHOU CONBA PHARMA
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