title: Influence of wood barrels classified by NIRS on the ellagitannin content/composition and on the organoleptic properties of wine.
abstract: Ellagitannins are extracted from oak wood during wine aging in oak barrels. This research is based on the NIRS (Oakscan) oak wood classification according to their index polyphenolic (IP) (between 21.07 and 70.15). Their level in wood is very variable (between 5.95 and 32.91 mg/g dry wood) and influenced their concentration in red wine (between 2.30 and 32.56 mg/L after 24 months of aging) and thus their impact on wine organoleptic properties. The results show a good correlation between the NIRS classification and the chemical analysis (HPLC-UV-MS and acidic hydrolysis procedure) and with the wood ellagitannin level, the ellagitannin extraction kinetic, and the ellagitannins evolution in red wine (Cabernet Sauvignon). Moreover, a correlation between the NIRS classification and the increasing intensity of some wood aromas (woody, spicy, vanilla, and smoked/toasted), flavors (bitterness and astringency), and a decreasing intensity of fruitiness was also observed.
authors.affiliation: Univ. Bordeaux, ISVV, EA 4577 Oenologie, 210, chemin de Leysotte CS 50008, 33882 Villenave d'Ornon cedex, France.
authors.forename: Julien
authors.initials: J
authors.lastname: Michel
authors.forename: Michael
authors.initials: M
authors.lastname: Jourdes
authors.forename: Alexandra
authors.initials: A
authors.lastname: Le Floch
authors.forename: Thomas
authors.initials: T
authors.lastname: Giordanengo
authors.forename: Nicolas
authors.initials: N
authors.lastname: Mourey
authors.forename: Pierre-Louis
authors.initials: PL
authors.lastname: Teissedre
mesh_terms: D000328:Adult; D002851:Chromatography, High Pressure Liquid; D005260:Female; D005524:Food Technology / Q000295:instrumentation*; D006801:Humans; D047348:Hydrolyzable Tannins / Q000737:chemistry*; D008297:Male; D013058:Mass Spectrometry; D029963:Quercus / Q000737:chemistry*; D019265:Spectroscopy, Near-Infrared; D013649:Taste; D014920:Wine / Q000032:analysis*; D014934:Wood / Q000737:chemistry*
chemical_list: D047348:Hydrolyzable Tannins; C013515:ellagitannin