Cutting and slicing fruits may induce a rapid enzymatic depletion due to the cellular disruption which allows contacts of substrates and enzymes [1]. Thus, the vitamin C losses can be due not only to primary and secondary drying of freeze-drying (thermal processing), but also by the operations before drying such as cutting, slicing and freezing (first stage of freeze-drying). Ascorbate oxidase has been proposed to be the major enzyme responsible for enzymatic degradation of ascorbic acid. Other plant enzymes, including plenolase, cytochrome oxidase and peroxidase, are indirectly responsible for ascorbic acid loss [2].