Table 1.

Odor pairs used for olfactory discrimination testing (cross-habituation testing) and corresponding v/v dilutions (1 Pa)

Odor pairsOdors
1+Limonene and −Limonene (0.204%)
2Pentanol (0.074%) and Butanol (0.021%)
3Decanal (1.78%) and (2)-Dodecanone (12.5%)
4(+) Limonene (0.204%) and Decanal (1.78%)
5Isoamyl acetate (0.05%) and Octanal (0.148%)
  • Each pair is composed of perceptually similar odorants (1 to 3) or dissimilar odorants (4 and 5) diluted in mineral oil to have similar vapor pressure.