Color, flavor and texture are important quality charac- teristics and major factors affecting sensory perception and consumer acceptance of foods. The pH of most food products varies between 3.5 and 7.0. pH has an important effect on pigments (e.g., chlorophyll, carotenoids, antho- cyanins, etc.) responsible for the color of fruits, vegetables and meat. Thus, knowledge of pH is necessary to produce safe, high-quality and value-added products.