The results illustrated in (Fig. 2b) revealed that there was a significant decrease in
ascorbic acid values of chitosan coated fruits along with the storage period. However, the
rate of decrease in vitamin C was significantly higher in untreated control fruits as
compared with coated fruits. Present studies showed that vitamin C was mostly high in
mature but unripe mango fruits and it decreased as the ripening progressed. The reason
for high vitamin C content in coated fruit can be attributed to slow ripening rate of
chitosan treated fruit. Oxidation of ascorbic acid may be caused by several factors
including exposure to oxygen, metals, light, heat and alkaline pH