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Changes in vitamin C content of fruits and vegetables before and after 15 days of storage at 4 °C, extracted in metaphosphoric acid and measured by AOAC method (A), DCPIP spectrophotometric method (B) and DNP method (C). Error bars represent standard error of means of three replicates. * indicate significant differences (Fisher’s LSD, p < 0.05) between values before and after storage.
