Backround: Ginkgo biloba extract (GBE) is one of the most widely used extracts in food supplements
and herbal medicines with wide spectrum of activities.
Introduction: Extracts of Ginkgo leaves contain biologically active flavonoid glycosides from different
types mainly flavonol derivatives such as rutin. The amounts of flavone glycosides, one of the key active
components in GBE, vary in accordance with the source of the Ginkgo leaves and the extraction and other
Method: With respect to quality control optimization solutions, a simple, precise, accurate and reproducible
HPLC method for assay of flavonol glucoside rutin is developed and applied to supplements containing
GBE. The method is based on the use of isocratic mobile phase regimen with UV detection.
Result: Rutin is successfully separated using 4.6 x 150 mm column RP-18, ODS with particle size 5 m
without preliminary hydrolysis. The proposed method is validated in accordance with ICH and European
Pharmacopoeia 8.0 requirements and compared with HPLC methods in European Pharmacopoeia and US
Conclusion: The proposed method could be applicable for identification, purity and assay tests of supplements
containing Ginkgo biloba extract according to Pharmacopoeia requirements.