title: Comparison and chemometric analysis of the phenolic compounds and organic acids composition of chinese wines.
abstract: Characteristics of 106 wines from 5 major grape varieties and 3 typical geographic regions in China were investigated by means of profiling of organic acids and phenolic compounds analysis. An ultra-performance liquid chromatography method was developed and thus, large number of samples could be determined in a quick and reliable way. The results showed that different origins and varieties were characteristic of various profiles of organic acid and phenolic compounds. In order to investigate possible correlation between organic acids and phenolic compounds content and grape variety and/or geographical origin, analysis of variance and linear discriminant analysis (LDA) were conducted. A satisfactory LDA result for red wines according to geographic origin was obtained, in which the correct classification was 100% and the leave-one-out validation accuracy was 90%. The corresponding results of white wines were 91% and 86%, respectively. When LDA was processed, according to grape varieties, the proportionality of successfully classified wines was 96%, while the leave-one-out validation accuracy was 94%. The organic acids and phenolic compounds profiles were useful in the classification of Chinese wines according to grape variety and geographic origin.
authors.affiliation: State Key Laboratory of Food Science and Technology, Jiangnan Univ, 1800 Lihu Ave, Wuxi 214122, Jiangsu, PR China; Centre for Brewing Science and Enzyme Biotechnology, School of Biotechnology, Jiangnan Univ, 1800 Lihu Ave, Wuxi 214122, Jiangsu, PR China.
authors.forename: Ke
authors.initials: K
authors.lastname: Tang
authors.forename: Lei
authors.initials: L
authors.lastname: Ma
authors.forename: Ye-Hui
authors.initials: YH
authors.lastname: Han
authors.forename: Yao
authors.initials: Y
authors.lastname: Nie
authors.forename: Ji-Ming
authors.initials: JM
authors.lastname: Li
authors.forename: Yan
authors.initials: Y
authors.lastname: Xu
mesh_terms: D000704:Analysis of Variance; D002264:Carboxylic Acids / Q000032:analysis*; D002681:China; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002853:Chromatography, Liquid; D016002:Discriminant Analysis; D005419:Flavonoids / Q000032:analysis; D005638:Fruit / Q000737:chemistry; D010636:Phenols / Q000032:analysis*; D027843:Vitis / Q000737:chemistry; D014920:Wine / Q000032:analysis*
chemical_list: D002264:Carboxylic Acids; D005419:Flavonoids; D010636:Phenols
keywords: chemometric; organic acids; phenolic compounds; ultra-performance liquid chromatography; wine