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The Terroir Concept Interpreted through Grape Berry Metabolomics and Transcriptomics
Published on: October 5, 2016
Comparative analysis of sensory properties and chemical composition in grape spirits: Pervaporation separation vs.
Xiaoqin Wang1, Wenwen Cui2, Shuang Han2
1Key Laboratory of Geriatric Nutrition and Health (Beijing Technology and Business University), Ministry of Education, Beijing 100048, China; Key Laboratory of Brewing Molecular Engineering of China Light Industry, Beijing Technology and Business University, Beijing 100048, China; Department of Nutrition and Health, China Agricultural University, Beijing 100193, China.
Abstract:
To clarify the effects of pervaporation and distillation on aroma profiles, the Sensomics approach investigated the aroma characteristics and key aroma compounds of Cabernet Sauvignon (CS) and Ugni Blanc (UB) grape spirits produced by pervaporation (UB-P, CS-P) and distillation (UB-D, CS-D). The results indicated that pervaporated grape spirits exhibited stronger floral and fruity aromas, while distilled grape spirits were characterized by more pronounced cooked apple and toasty aromas. Consumers preferred products with intense floral and fruity aromas and weaker cooked apple note. After identifying key aroma compounds in UB-P, UB-D, CS-P and CS-D, two-way ANOVA and Orthogonal partial least squares discrimination analysis (OPLS-DA) were conducted to reveal that γ-butyrolactone, ethyl 2-hydroxy-4-methylpentanoate, acetoin, 3-methyl-1-butanol, linalool, leaf alcohol, (E)-β-damascenone, ethyl octanoate, isoamyl acetate, and octanoic acid served as differential markers for distinguishing grape spirits produced by the two processes. This study provides theoretical support for selecting separation processes in grape spirit production.
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