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Chemical Senses Advance Access originally published online on February 13, 2007
Chemical Senses 2007 32(4):319-327; doi:10.1093/chemse/bjm002
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© The Author 2007. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org

Perceptual Interactions between Characteristic Notes Smelled above Aqueous Solutions of Odorant Mixtures

Chantal Brossard, Florence Rousseau and Jean-Pierre Dumont

Institut National de la Recherche Agronomique, Unité de Recherches Biopolymères, Interactions, Assemblages, Nantes, France

Correspondence to be sent to: C. Brossard, Institut National de la Recherche Agronomique, BIA, Rue de la Géraudière, BP 71627, 44316 Nantes cedex 3, France. e-mail: brossard{at}nantes.inra.fr


  Abstract

Twenty-two experienced panelists rated odor intensity of aqueous solutions of citral, octen-1-ol-3, and hexanal. The panel assessed unmixed components and mixtures (9 binary and 4 ternary). In sensory sessions dedicated to mixtures (n = 6), evaluation was focused on one target odor, presented at a fixed concentration. All components had lower odor intensity on mixed presentations. In many cases, information obtained from simpler systems was not extended to complex mixtures. In a mixture, the competition between odorant molecules on qualitative aspects (dominance/suppression) imbalanced components contribution, anticipated from the quantitative distribution. Hexanal appeared to be the potentially weaker odorant in paired combinations, whereas octen-1-ol-3 had a lower relative impact on ternary systems. Suppression of the odor of octen-1-ol-3 and a concomitant increase in the odor of hexanal was common to all ternary mixtures. Reciprocal inhibition of octen-1-ol-3 and citral odors through perceptual interactions was suspected. Mutual suppression is suspected to have eased the perception of hexanal intensity.

Key words: aroma balance, masking, mixed odorants, odor intensity, odor suppression

Accepted 13 January 2007


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