Materials
(a) Strawberries (Fragaria ananassa) of season (2012) used in this study were purchased from the local market in Giza governorate, Egypt.
(b) Chemicals used in this study were of analytical grade and purchased from El-Gomhoria Co.
(c) The anthocyanin standards from Carl Roth GmbH (D-76185 Karlsruhe, Germany).