title: Sensory assessment and chemical measurement of astringency of Greek wines: Correlations with analytical polyphenolic composition.
abstract: The purpose of this study was to measure the astringency of selected Greek red wines and to assess the relationship between sensory and chemical data. Nine red wines produced by three native Greek grape varieties (agiorgitiko, xinomavro and mavrodafni) were used and their astringency and bitterness was assessed by a trained panel. In addition, their astringency was estimated chemically employing the ovalbumin precipitation method. Their polyphenolic composition was also determined by High Performance Liquid Chromatography (HPLC). The sensory data showed that mandilaria was the most astringent variety whereas agiorgitiko was the least. Statistical analysis of the results indicated that the chemical data obtained for astringency significantly correlated with the sensory determinations. In addition, significant correlations were obtained between the sensory data and the wine polyphenolic composition.
authors.affiliation: National Agricultural Research Foundation, Wine Institute, S. Venizelou 1, Likovrisi, 14123 Athens, Greece. Electronic address: stamkali.wi@nagref.gr.
authors.forename: S
authors.initials: S
authors.lastname: Kallithraka
authors.affiliation: Liquor Control Board of Ontario (LCBO), 55 Lakeshore Blvd. East, Toronto, Ontario, Canada M5E 1A4.
authors.forename: D
authors.initials: D
authors.lastname: Kim
authors.affiliation: Department of Œnology & Beverage Technology, Technological Educational Institute (T.E.I.) of Athens, Ag. Spyridona Str., 12210 Egaleo, Athens, Greece.
authors.forename: A
authors.initials: A
authors.lastname: Tsakiris
authors.affiliation: Department of Œnology & Beverage Technology, Technological Educational Institute (T.E.I.) of Athens, Ag. Spyridona Str., 12210 Egaleo, Athens, Greece.
authors.forename: I
authors.initials: I
authors.lastname: Paraskevopoulos
authors.affiliation: Liquor Control Board of Ontario (LCBO), 55 Lakeshore Blvd. East, Toronto, Ontario, Canada M5E 1A4.
authors.forename: G
authors.initials: G
authors.lastname: Soleas
keywords: Agiorgitiko; Astringency; Greek wines; Mandilaria; Time–intensity (T–I); Xinomavro