Identification of caffeic acid derivatives in Echinacea spp
Caffeic acid derivatives are one group of active constituents in Echinacea.
Their distribution is variable and complex, and they may be used for
identification of Echinacea species in commercial preparations.
The characteristic chemical fingerprints of E. angustifolia,
E. pallida and E. purpurea were examined by micellar electrokinetic
chromatography (MEKC), a technique that has the advantage of higher
resolution than either reversed-phase chromatography or capillary electrophoresis
alone. The technique can be used to identify Echinacea species
in combinations, or applied to quality control.
Pietta P, Mauri P, Bauer R.
MEKC analysis of different Echinacea species. Planta Medica
1998; 64:649-652. |
