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The yield of 3‐deoxy‐4‐sulphopentosulose in the sulphite inhibited non‐enzymic browning of ascorbic acid
Author(s) -
Wedzicha Bronislaw L.,
Imeson Alan P.
Publication year - 1977
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740280803
Subject(s) - browning , ascorbic acid , chemistry , yield (engineering) , glycine , food science , organic chemistry , biochemistry , inorganic chemistry , amino acid , materials science , metallurgy
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.