Abstract
Interaction studies are used in sensory evaluation to elucidate the complex influences (additive, masking, synergistic) that various compounds have on the perception of wine aroma. To these, the interactions between the matrix and the compounds of interest add another layer of complexity. Unlike previous interaction studies, the current work used a rapid method, Projective Mapping (PM) coupled with intensity of attributes, to evaluate the interaction effects two thiols (3-mercaptohexan-1-ol, 3MH, and 3-mercaptohexyl acetate, 3MHA) have in various matrices. The matrices used were increasingly complex, from model wine to partially dearomatized neutral Chenin Blanc to commercial wines. The results reflected the effect of the thiols interaction with the matrix more than that between compounds. The methodology proposed for the data handling highlighted possible advantages and shortcomings of the Projective Mapping with intensity approach. The choice of base matrix as well as the sensory method are relevant when studying interaction effects, and are dependent on the desired outcome of the experiment.
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