Water activity of osmotically dehydrated and CaCl2 infused purple sweet potatoes are shown in Figure 2. Aw was decreased in the samples during storage under both temperature (4C & RT). Aw of osmotically dehydrated purple sweet potatoes during storage was significantly differed under different temperature storage.
Purple sweet potatoes that were undergone for osmotic process at room temperature was ranged Aw lowest (0.9343) and Purple sweet potatoes that were undergone for osmotic process at 4C was ranged Aw lowest (0.9400). The samples storage at room temperature was losing Aw more quickly when compared with 4C.