Extractant, extraction process and analysis method of high-activity ginkgo leaf extractive

The present invention is extractant, extraction process and analysis method of high-activity ginkgo leaf extractive. The key point of the present invention is one developed extractant for water extraction process of ginkgetin and EGb and the process has no step of eliminating ginkolic acid. These al...

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Bibliographische Detailangaben
Hauptverfasser:	ERNING YANG, WEIWANG HU, BIJUN XIE
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMISTRY DERIVATIVES THEREOF GENERAL METHODS OF ORGANIC CHEMISTRY HETEROCYCLIC COMPOUNDS METALLURGY NUCLEIC ACIDS NUCLEOSIDES NUCLEOTIDES ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION SUGARS TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention is extractant, extraction process and analysis method of high-activity ginkgo leaf extractive. The key point of the present invention is one developed extractant for water extraction process of ginkgetin and EGb and the process has no step of eliminating ginkolic acid. These also includes one efficient liquid-phase chromatographic method for the quantitative analysis of ginkolic acid with secondary chemical balance. The product contains total flavone glycoside 24-32%, total terpenoid lactone 6-13%, protocyanidine 8-14% and ginkolic acid less than 5 ppm, and has yield of 2.8-3.6%. The extractant has low cost, small consumption, no residue, high stripping rate of flavones, terpenoid lactones and protocyanidin compound and has stripping of ginkolic acid.