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The yield of 3-deoxy-4-sulphopentosulose in the sulphite inhibited non-enzymic browning of ascorbic acid

✍ Scribed by Bronislaw L. Wedzicha; Alan P. Imeson

Publisher: John Wiley and Sons
Year: 1977
Tongue: English
Weight: 298 KB
Volume: 28
Category: Article
ISSN: 0022-5142
DOI: 10.1002/jsfa.2740280803

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✦ Synopsis

Abstract

The ion exchange behaviour of 3‐deoxy‐4‐sulphopentosulose is markedly influenced by the presence of hydrogen sulphite ion, the dihydroxysulphonate being held more firmly on a strongly basic resin than the free dicarbonylic product. The apparent formation of other sulphonates in model ascorbic acid/glycine/HSO~3~‐ reactions is explained in terms of this ion exchange behaviour and the major reaction product is 3‐deoxy‐4‐sulphopentosulose in 75 % yield. In foods, the yields of this sulphonate and also of 3‐deoxy‐4‐sulphohexosulose are now regarded as true indicators of the extent of the fate of sulphur dioxide by way of its inhibition of non‐enzymic browning reactions.

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