AustralieFrV1, Main, Exploration, bibRecord, 008949

Understanding the contribution of ascorbic acid to the pigment development in model white wine systems using liquid chromatography with diode array and mass spectrometry detection techniques

Identifieur interne : 008949 ( Main/Exploration ); précédent : 008948; suivant : 008950

Understanding the contribution of ascorbic acid to the pigment development in model white wine systems using liquid chromatography with diode array and mass spectrometry detection techniques

Auteurs : Célia Barril [Australie] ; Andrew C. Clark [Australie] ; Geoffrey R. Scollary [Australie]

Source :

Analytica chimica acta [ 0003-2670 ] ; 2008.

RBID : Pascal:08-0457560

Descripteurs français

Pascal (Inist)
- Acide ascorbique, Pigment, Chromatographie phase liquide, Réseau diode, Spectrométrie masse, Réaction colorée, Système tampon, Acide tartrique, Acide formique, Chromatographie HPLC, Réseau capteur, Acide glyoxylique, Aldéhyde, Cétone, Cation, Vin blanc.
Wicri :
- topic : Vin blanc.

English descriptors

KwdEn :
- Aldehyde, Ascorbic acid, Buffer system, Cations, Color reaction, Diode array, Formic acid, Glyoxylic acid, HPLC chromatography, Ketone, Liquid chromatography, Mass spectrometry, Pigments, Sensor array, Tartaric acid, White wine.

Abstract

The present study investigated the contribution of ascorbic acid to the formation of coloured species in model white wine systems containing (+)-catechin as the oxidisable phenolic substrate. Reactions were carried out in the presence or absence of ascorbic acid in model wine systems buffered with either tartaric acid or formic acid. High performance liquid chromatography with diode array detector (HPLC-DAD) or mass spectrometry (HPLC-MS) analyses demonstrated that glyoxylic acid-derived xanthylium pigments were the main coloured species produced in all samples except those containing just (+)-catechin and formic acid. Higher concentrations of these pigments were detected in the tartaric acid based model system containing both (+)-catechin and ascorbic acid than in the corresponding formic acid model system. The inability of formic acid to form an aldehyde, unlike the known oxidative formation of aldehydes from tartaric acid, contributes to the lower colour development in the formic acid model system. Significantly, these observations imply that ascorbic acid must break down to provide an aldehyde, or ketone, capable of reacting with (+)-catechin to generate the glyoxylic acid-derived xanthylium cations.

Affiliations:

Australie

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to stream Main, to step Curation: 008949

Le document en format XML

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<front><div type="abstract" xml:lang="en">The present study investigated the contribution of ascorbic acid to the formation of coloured species in model white wine systems containing (+)-catechin as the oxidisable phenolic substrate. Reactions were carried out in the presence or absence of ascorbic acid in model wine systems buffered with either tartaric acid or formic acid. High performance liquid chromatography with diode array detector (HPLC-DAD) or mass spectrometry (HPLC-MS) analyses demonstrated that glyoxylic acid-derived xanthylium pigments were the main coloured species produced in all samples except those containing just (+)-catechin and formic acid. Higher concentrations of these pigments were detected in the tartaric acid based model system containing both (+)-catechin and ascorbic acid than in the corresponding formic acid model system. The inability of formic acid to form an aldehyde, unlike the known oxidative formation of aldehydes from tartaric acid, contributes to the lower colour development in the formic acid model system. Significantly, these observations imply that ascorbic acid must break down to provide an aldehyde, or ketone, capable of reacting with (+)-catechin to generate the glyoxylic acid-derived xanthylium cations.</div>
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Understanding the contribution of ascorbic acid to the pigment development in model white wine systems using liquid chromatography with diode array and mass spectrometry detection techniques

Understanding the contribution of ascorbic acid to the pigment development in model white wine systems using liquid chromatography with diode array and mass spectrometry detection techniques

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri