IS ELECTRODIALYSIS USEFUL IN A STUDY OF APPLE TISSUE

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Abstract
A comparative electrodialytic study of normal and physiologically broken down Jonathan apples revealed no essential difference between the 2 types of fruits. Extracts obtained from the anode compartment consisted almost entirely of malic acid. Only traces or very small amounts of nitrate, sulphate, and chloride ions were present. Extracts taken from the cathode compartment contained very little Ca and appreciable amounts of K, enough to account for over \ of the total ash. Practically all of the basic dialyzable material was obtained during the 1st 6-hr. period. The malic acid continued to dialyze out, but at a decreasing rate, throughout 3 6-hr. periods. The electrodialysis of a malic acid-sugar solution was similar to that of apple tissue itself. The construction of a 3 compartment cell from a rubber battery box is described.