Reactions Involved in Sulfite Bleaching of Anthocyanins
- 1 January 1964
- journal article
- Published by Wiley in Journal of Food Science
- Vol. 29 (1) , 16-19
- https://doi.org/10.1111/j.1365-2621.1964.tb01685.x
Abstract
SUMMARY: The bleaching of anthocyanins by sulfur dioxide is a reversible process that does not involve hydrolysis of the 3‐glycosidic group, reduction of the pigment, or addition of bisulfite to a ketonie, chalcone derivative. In sulfite decoloration the reactive species is the anthocyanin carbonium ion (R+). The experimental evidence indicates that this simply reacts with a bisulfite ion to form a colorless chromen‐2 (or 4)‐sulfonic acid (R‐SO3H), similar in structure and properties to an anthocyanin carbinol base (R‐OH).Keywords
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