Stabilities of anthocyanins from Concord grapes, red cabbage, tradesca
ntia and ajuga were studied. RP-HPLC analysis was used to characterize
individual anthocyanins and spectrophotometric analysis for all pigme
nts. Anthocyanins from tradescantia were much more stable than the oth
er extracts. Such increased stability was attributed to its intrinsic
nature.