Identification of the main odor-active compounds in musts from French and Romanian hybrids by three olfactometric methods

Three olfactometric methods (frequency of detection, time-intensity method, and aroma extract dilution analysis) were used to evaluate the main odoran ts of three musts obtained from French-Romanian hybrids (Valerien, Admira, and Brumariu). The three methods allow detection of the same odor-active co mpounds. The results obtained from these methods were closely related. Nine teen odor-active compounds were detected, and 13 were identified. The three methods showed the importance of an unidentified compound with a grape and grape juice aroma note in the three musts. Among the other compounds, 3-he xen-1-al, (E,Z)-2,6-nonadien-1-ol, and 1-ccten-3-one seemed to contribute a ctively to the odor of Valerien must. 3-(Methylthio)propanal and hexanal we re contributors to the Admira and Brumariu odor. Phenylacetaldehyde was one of the main odor-active compounds in must from Admira.