Ginkgo biloba diterpene lactones

Extraction source: This product is the leaf extracted from the leaves of Ginkgo biloba LGinkgo Biloba Lwith a total ester content of 80%main ingredient: Ginkgo ester B Ginkgolide B, content: 40%p style"text-align: "text-align": center;" "Img alt" "Ginkgo biloba"src"/uploads/allimg/1702/2-1F201I024295.jpg" height: 192px ; Ingredients: Ginkgo ester A, Ginkgo ester C, ginkgo ester J Ginkgolide A, Ginkgolide C, Ginkgolide M, Ginkgolide J white fruit content: 40%. .the product is white to pale yellow powder, ethyl ethyl, ethyl acid, ethyl, ethylidentification: Take this product with acetone to make 0.5% solution for test ingeThe standard Ginkgo esters A, B, C and white fruit esters with acetone were used as a control solution containing 1 mg/ml each ginkgo biloba standard control medicine 2.0g plus 75% acetone ultrasound extraction 30 minutes, filter steamed dry, residue with water 20 ml dissolved, with ethyl acetate extract 3 times, ethyl acetate extract steamed dry, with acetone 1 ml dissolved as a control solutionTake the above three liquids each 5 sl, respectively, point on the same silicone G4% sodium acetate and CMC board, to xylene-acetate-acetone methanol (10; 5:5:0.6) to expand, acetate vapor fumigation for 15 minutes, 140 to 160 degrees C heating for 30 minutes, uv lamp 365nm inspectionThe corresponding position of the standard speckle appears the same color fluorescent spots, compared to the standard medicinal spots, the corresponding rate of 60%: Dry weightlessness: No more than 2.0% (Appendix IX.G)burning residue: No more than 0.3% (Appendix IX.J)Heavy Metals: No more than 10ppm (Appendix IX.E)Total Ginkgo icing acid: No more than 10ppm (Appendix VI D liquid chromatography) chromatography condition C18 flow phase: methanol 1% ice acetic acid (90:10) detection wavelength: 310 nm the number of theory boards is 4000 control liquid: take the new acid label of white fruit label with methanol to make a 5 sg/ml solution backup, take ginkgo total acid control with methanol to make 100 sg/ml solution backup for test inge: take this product 10g plus petroleum ether 50ml, weighing, reflux extraction 2 hours, cooling, oil ether complement weight, take the filter 25ml, steamed in, residue plus methanol 2ml dissolved standby the determination method: take the above three liquid 10 sl injection liquid chromatography, the total acid content is calculated by the new acid outer label method of white fruit content determination is measured by high-efficiency liquid chromatography (Appendix VI D) chromatography condition C18 column mobile phase: propylene alcohol tetrahydrofuran water (1:15:84), evaporative light scattering detector detection The number of theory boards is 2500 control fluid: Take ginkgo ester B standard with methanol to make 1mg/ml solution backup for test fluid: take this product with methanol to make a 2mg/ml solution backup the determination method: take the above two-liquid 10 sl injection liquid chromatography, and calculate the total ester content the main treatment of the function: to promote wisdom, protect kidneys, lower blood pressure, lower blood lipids, anticoagulants, improve blood flow to improve learning, memory, anti-semitic, anti-rejection, antioxidant, anti-inflammatory For Alzheimer's disease, cerebral ischemia, brain damage, parasitic diseases storage is cool, dry and light-proof