White wine making from concentrated grape must of forein-made

Part 2 Prevention of potassium bitartrate deposition by a cation exchange resin treatment

Abstract

A method to prevent the potassium bitartrate deposition in acicliried wine by replacing A. with Na was examined. In the experiment, a white wine which was made from a concentrated grape juice of foreign-made (Pedro Ximenez variety) and added with tartaric acid in a ratio of 30 was treated with Amberlite IR-122.
I. Affinities of main cations contained in the white wine to Amberlite IR-122 was as follows:
Ca> Mg> K>Fe=Cu
2. It was shown in connection with the conditions of the ion exchange treatment that a definite ratio of K to tartaric acid in the wine had important effect on the prevention of the tartar deposition.
3. It was found that the ion exchange treatment was more effective in removing tartar than thecold stabilization which had no effect on the quality of the wine.