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Quantitative analysis of Bordeaux red wine precipitates by solid-state NMR: Role of tartrates and polyphenols

dc.relation.isnodouble7e8c343a-90b8-4bee-88ef-891b062c6702*
dc.relation.isnodouble5a447b45-525e-47e3-9635-02186324e20a*
dc.contributor.authorPRAKASH, Shipra
dc.contributor.authorITURMENDI, Nerea
dc.contributor.authorGRELARD, Axelle
dc.contributor.authorMOINE, Virginie
dc.contributor.authorDUFOURC, Erick
dc.date.accessioned2020-09-03T07:56:08Z
dc.date.available2020-09-03T07:56:08Z
dc.date.issued2016
dc.identifier.issn0308-8146
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/10829
dc.description.abstractEnStability of wines is of great importance in oenology matters. Quantitative estimation of dark red precipitates formed in Merlot and Cabernet Sauvignon wine from Bordeaux region for vintages 2012 and 2013 was performed during the oak barrel ageing process. Precipitates were obtained by placing wine at -4 degrees C or 4 degrees C for 2-6 days and monitored by periodic sampling during a one-year period. Spectroscopic identification of the main families of components present in the precipitate powder was performed with C-13 solid-state CPMAS NMR and 1D and 2D solution NMR of partially water re-solubilized precipitates. The study revealed that the amount of precipitate obtained is dependent on vintage, temperature and grape variety. Major components identified include potassium bitartrate, polyphenols, polysaccharides, organic acids and free amino acids. No evidence was found for the presence of proteins. The influence of main compounds found in the precipitates is discussed in relation to wine stability. (c) 2016 Published by Elsevier Ltd.
dc.language.isoen
dc.title.enQuantitative analysis of Bordeaux red wine precipitates by solid-state NMR: Role of tartrates and polyphenols
dc.typeArticle de revue
dc.subject.halChimie/Matériaux
bordeaux.journalFood Chemistry
bordeaux.page229-237
bordeaux.volume199
bordeaux.hal.laboratoriesInstitut de Chimie & de Biologie des Membranes & des Nano-objets (CBMN) - UMR 5248*
bordeaux.hal.laboratoriesInstitut de Chimie & de Biologie des Membranes & des Nano-objets (CBMN, UMR 5248)
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
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