Détail de la notice
Titre du Document
Identification of the origin of commercial enological tannins by the analysis of monosaccharides and polyalcohols
Auteur(s)
LUZ SANZ M. ; MARTINEZ-CASTRO Isabel ; MORENO-ARRIBAS M. Victoria
Résumé
The monosaccharide and polyalcohol composition of 28-samples of different commercial tannins, including oak wood, grape seed and skin, plant gall, chestnut, quebracho and gambier, has been evaluated by gas chromatography-mass spectrometry after derivatization into their trimethylsilyl ethers. Quercitol was found to be characteristic of oak tannins, whereas gall plant tannins could be differentiated by their content of pinitol. Myo-inositol and arabitol were detected in tannins from quebracho. These polyalcohols, together with muco-inositol and chiro-inositol, were found in tannins from chestnut while bornesitol was found to be characteristic of tannins from gambier. Monosaccharide composition also helped to distinguish among tannin origins: arabinose, xylose, fructose and glucose were quantified in oak, quebracho and chestnut tannins, whereas only fructose and glucose were detected in plant gall and grape tannins. These results imply that the qualitative study of monosaccharides and polyalcohols could help to determine and control the authenticity of enological tannins.
Editeur
Elsevier
Identifiant
ISSN : 0308-8146 CODEN : FOCHDJ
Source
Food chemistry A. 2008, vol. 111, n° 3, pp. 778-783 [6 pages] [bibl. : 1/4 p.]
Langue
Anglais
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