Low Molecular Weight Polyphenols in Cork of Quercus suber

Low molecular weight polyphenols were studied by HPLC in samples of cork from different trees of Spanish Quercus suber and at different industrial processing stages. Gallic, protocatechuic, vanillic, caffeic, ferulic, and ellagic acids; protocatechuic, vanillic, coniferylic, and sinapic aldehydes, a...

Full description

Saved in:
Bibliographic Details
Published in:Journal of agricultural and food chemistry 1997-07, Vol.45 (7), p.2695-2700
Main Authors: Conde, Elvira, Cadahía, Estrella, García-Vallejo, María Concepción, Fernández de Simón, Brígida, González Adrados, José Ramón
Format: Article
Language:English
Subjects:
ACIDE PHENOLIQUE
ACIDOS FENOLICOS
ALDEHIDOS
ALDEHYDE
ALDEHYDES
Biological and medical sciences
CHEMICAL COMPOSITION
COMPOSICION QUIMICA
COMPOSITION CHIMIQUE
CORCHO
CORK
Fermented food industries
Food industries
Fundamental and applied biological sciences. Psychology
LIEGE
PHENOLIC ACIDS
QUERCUS SUBER
Wines and vinegars
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Low molecular weight polyphenols were studied by HPLC in samples of cork from different trees of Spanish Quercus suber and at different industrial processing stages. Gallic, protocatechuic, vanillic, caffeic, ferulic, and ellagic acids; protocatechuic, vanillic, coniferylic, and sinapic aldehydes, and aesculetin and scopoletin were identified and quantified. Ellagic acid was the main component in all of the samples, followed by the rest of the phenolic acids, which had very much lower concentrations. Four components, caffeic, ferulic, and protocatechuic acids and vanillin, were selected as those that provided the greatest differences among the trees studied. In relation to the four industrial processing stages considered, marked differences were observed between the first two stages, stripping and first rest, and the stages after boiling. In this case, the discriminant variables were coniferaldehyde, sinapaldehyde, and ellagic acid. Keywords: Quercus suber; cork; polyphenols; phenolic acids and aldehydes; coumarins; high-performance liquid chromatography
ISSN:0021-8561
1520-5118
DOI:10.1021/jf960486w