Variation in the Phenolic Composition of Cork Stoppers from Different Geographical Origins

Cork stopper granulates from five geographical origins from Portugal and six from Spain were analyzed regarding polyphenol composition by HPLC-DAD/ESI-MS and geographical discrimination studied by near-infrared spectroscopy (NIRS). The phenolic composition of the eleven origins ranged from 30 to 52...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry 2020-12, Vol.68 (50), p.14970-14977
Main Authors: Reis, Sofia F, Teixeira, Telma, Pinto, Joana, Oliveira, Vanda, Lopes, Paulo, Cabral, Miguel, Mateus, Nuno, Guedes de Pinho, Paula, Pereira, Helena, de Freitas, Victor
Format: Article
Language:English
Subjects:
Chromatography, High Pressure Liquid
Food and Beverage Chemistry/Biochemistry
Food Packaging - instrumentation
Geography
Mass Spectrometry
Phenols - chemistry
Plant Bark - chemistry
Plant Bark - classification
Portugal
Quercus - chemistry
Quercus - classification
Spain
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Summary:Cork stopper granulates from five geographical origins from Portugal and six from Spain were analyzed regarding polyphenol composition by HPLC-DAD/ESI-MS and geographical discrimination studied by near-infrared spectroscopy (NIRS). The phenolic composition of the eleven origins ranged from 30 to 52 mg/g cork granulates, with vescavaloninic acid, castalagin, sanguisorbic acid dilactone, vescalagin, castavaloninic acid, dehydrated tergallic-C-Glc, and ellagic acid being the major compounds. NIRS revealed to be a powerful tool to discriminate origins and predict the concentration of polyphenols. However, polyphenols do not fully explain the discrimination of geographical origins. Variability in the polyphenol composition of cork stoppers is not significantly influenced by geographical location but probably may be more related to the plant genetics, tree age, and phytosanitary and edaphoclimatic conditions.
ISSN:0021-8561
1520-5118
DOI:10.1021/acs.jafc.0c00586