Quantity of ginkgolide A, ginkgolide B, ginkgolide C, ginkgolide J, bilobalide, and flavonol glycosides in five individual lots of G. biloba extract
The terpene trilactones were determined by gas chromatography (Indena S.A.) and the flavonol glycosides were analyzed by liquid chromatography-mass spectrometry (ChromaDex).
| Quantity in G. biloba Extract | |||||
|---|---|---|---|---|---|
| Lot A | Lot B | Lot C | Lot D | Lot E | |
| % w/w | |||||
| Terpene trilactone | |||||
| Ginkgolide A | 1.1 | 0.9 | 1.3 | 1.5 | 1.3 |
| Ginkgolide B | 0.3 | 0.3 | 0.6 | 0.6 | 0.6 |
| Ginkgolide C | 1.4 | 1.5 | 1.4 | 1.4 | 1.4 |
| Ginkgolide J | 0.6 | 0.6 | 0.5 | 0.6 | 0.5 |
| Bilobalide | 2.8 | 2.9 | 3.0 | 3.0 | 3.0 |
| Total terpene trilactones | 6.2 | 6.2 | 6.8 | 7.1 | 6.8 |
| Total flavonol glycosides | 21.0 | 24.4 | 24.4 | 24.3 | 24.4 |