title: Evaluation of differences in the aroma composition of free-run and pressed neutral grape juices obtained from Emir (Vitis vinifera L.).
abstract: In this study, the differences in the aroma compounds released after the free-run and pressed juices of cv. Emir grape (Vitis vinifera L.) were evaluated. Aroma compounds were obtained by liquid-liquid extraction with CH(2) Cl(2) , and then analyzed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS). According to the results, pressing uniformly increased the levels of the aromatic constituents, but this treatment lowered the grape juice quality for winemaking by increasing the total phenolic compounds, browning index, and C(6) -alcohol levels (green-herbaceaous odor) as compared to the free-run juice. From all the aroma compounds identified in both juices, hexan-1-ol, (E)-hex-2-en-1-ol, isobutanol, isoamyl alcohol, and 2-phenylethanol were the most abundant volatile compounds.
authors.affiliation: University of Çukurova, Faculty of Agriculture, Department of Food Engineering, TR-01330 Adana. sselli@cu.edu.tr
authors.forename: Serkan
authors.initials: S
authors.lastname: Selli
authors.forename: Berfu
authors.initials: B
authors.lastname: Bagatar
authors.forename: Kemal
authors.initials: K
authors.lastname: Sen
authors.forename: Haşim
authors.initials: H
authors.lastname: Kelebek
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry; D059625:Liquid-Liquid Extraction; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification; D027843:Vitis / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D010636:Phenols; D055549:Volatile Organic Compounds