Components and stability analysis of the petal pigments in different colored Anemone obtusiloba petals

The components and stability of pigment from Anemone obtusiloba with two different flower colors were analyzed by the specific color reactions and UV-visible spectrum. Results showed that the two different colored petals of A. obtusiloba consisted of chlorophyll and carotenoid, the main petal pigments belonged to flavonoid, definitely including flavone, anthocyanins, flavonols, flavanonols, excluding flavanonols and aurones. These flavonoid had phenolic hydroxyl,4-keto, 3-hydroxy or 4-keto, 5-hydroxy. The stability of anthocyanins was affected by different values of pH, the anthocyanins under dark condition were more stable than that under light. The stability of petal pigments was mainly influenced by Fe3+ and Cu2+.