Table 1.
Total phenols, proanthocyanidins, and total flavonoids of Ginkgo biloba pollen (GP), Ginkgo biloba leaf (GL) and Ginkgo biloba nut (GN) (mg/g)a.
Table 2.
Three flavonol aglycones of Ginkgo biloba pollen (GP), Ginkgo biloba leaf (GL) and Ginkgo biloba nut (GN) (mg/g)a.
Fig 1.
HPLC chromatograms of extracts of Ginkgo biloba pollen (GP) and Ginkgo biloba leaf (GL).
(A) Ginkgo biloba pollen (GP), (B) Ginkgo biloba leaf (GL); (1) flavonoid glycosides, (2) flavonol aglycones, (3) biflavones; Peaks 1–10: antioxidant peaks screened from Ginkgo biloba pollen (GP) by off-line DPPH-HPLC-PAD method (see Fig 2).
Fig 2.
Chromatograms of Ginkgo biloba pollen (GP) extracts with UV at 265 nm detection of antioxidant flavonoids based upon DPPH elimination.
Ten antioxidant peaks 1 through 10 were labeled in the profile.
Table 3.
The peak areas of peaks 1 through 10 before and after reacting with DPPH and the rates of decline (%).
Table 4.
λmax, [M+H]+, and [M-H]- of the ten antioxidant peaks in Ginkgo biloba pollen (GP) by HPLC-ESI-MS2.
Table 5.
Identification of the ten antioxidant peaks in Ginkgo biloba pollen (GP) by HPLC-ESI-MS2.