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Characterization of Dehydroascorbic Acid Solutions by Liquid Chromatography/mass Spectrometry by Paolo Pastore; Tania Rizzetto; Ornella Curcuruto; Michele Dal Cin; Alessio Zaramella; Daniele Marton is a Chemistry article available to read on EtoBox.

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## Abstract The composition of a commercial dehydroascorbic acid (DA) solution at pH 2 was investigated by liquid chromatography/mass spectrometry (LC/MS) and liquid chromatography/tandem mass spectrometry (LC/MS/MS) to establish the nature of its different forms and its decomposition products. In freshly prepared solutions, dimeric forms of DA and the hydrated bicyclic hemiketal of DA are the species mainly present in solution. In the presence of light, the initial dimeric species disappears over time to give other dehydrated dimers some of which decompose to the monomer. The comparison of these data with similar data obtained for ascorbic acid (AA) solutions under the same experimental conditions revealed that, in the presence of light, the aging of such AA solutions gives rise to only the hemiketal form of DA, and that no dimeric species of DA were formed. The presence of the hemiketal form of DA was not revealed by analysis of the same AA solutions using the conventional LC/UV technique. The natural form of DA from the oxidation of AA is the hydrated bicyclic form. Copyright © 2001 John Wiley & Sons, Ltd.

Who reads Characterization of Dehydroascorbic Acid Solutions by Liquid Chromatography/mass Spectrometry?

Author

Paolo Pastore; Tania Rizzetto; Ornella Curcuruto; Michele Dal Cin; Alessio Zaramella; Daniele Marton

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0951-4198)

Published

2001

Language

EN

Field

Chemistry (Physical Sciences)