The initial moisture content of apple slices was found to be 84.61 ± 1.53% (w.b.), according to the vacuum oven method at 105◦C for 12 h. Apples were cut into slices with uniform thickness of 2, 4 and 6 mm perpendicular to the fruit axis using a slicer machine after washing, peeling, and removing the central part. The prepared slices were sunk in combinations of ascorbic acid (0.5%) with citric acid (0.5%) for5 minutes, according to the method has been described by Zhuet al. (2007)