title: Aroma Potential in Early- and Late-Maturity Pinot noir Grapes Evaluated by Aroma Extract Dilution Analysis.
abstract: Aroma potentials in early and late maturity Pinot noir grapes were investigated in two consecutive vintages. The grape samples were hydrolyzed under acidic conditions, and the released odorants were studied by aroma extract dilution analysis (AEDA). Forty-nine main odor-active compounds were detected in the AEDA. The odorants released with high flavor dilution values were 1-hexanal, β-damascenone, guaiacol, and vanillin, together with C6-aldehydes and -alcohols, 4-vinylguaiacol, 4-vinylphenol, and 1-octen-3-one. The concentrations of aroma-active compounds were further quantitated. Compared with early harvest grapes, late harvest grapes released more β-damascenone, vanillin, 4-vinylguaiacol, and 4-vinylphenol in both years according to both AEDA and quantitation results, suggesting they were important aroma compounds that contribute to the characteristic of matured Pinot noir grapes.
authors.affiliation: Department of Food Science and Technology, Oregon State University , Corvallis, Oregon 97331, United States.|Oregon Wine Research Institute , Corvallis, Oregon 97331, United States.
authors.forename: Fang
authors.initials: F
authors.lastname: Yuan
authors.affiliation: Department of Food Science and Technology, Oregon State University , Corvallis, Oregon 97331, United States.|Oregon Wine Research Institute , Corvallis, Oregon 97331, United States.
authors.forename: Michael C
authors.initials: MC
authors.lastname: Qian
mesh_terms: D005421:Flavoring Agents / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D007201:Indicator Dilution Techniques; D015394:Molecular Structure; D009812:Odorants / Q000032:analysis; D012903:Smell; D027843:Vitis / Q000737:chemistry* / Q000254:growth & development; D014920:Wine / Q000032:analysis*
chemical_list: D005421:Flavoring Agents
keywords: AEDA; GC−olfactometry; Pinot noir; flavor precursor; grape; maturity