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Detecting concentration differences in aromatic oils.

Neil Morris1

  • 1University of Wolverhampton, Division of Psychology, UK. NeilMorris1@aol.com

Perceptual and Motor Skills
|January 2, 2003
PubMed
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Researchers found that cardamom, rosemary, and ylang ylang essential oils were easily distinguishable by scent. However, concentrations of chamomile, cypress, geranium, jasmine, and lavender oils were difficult to differentiate, impacting their use in research.

Area of Science:

  • Aromatherapy research
  • Olfactory perception science

Background:

  • Aromatic oils are widely used in complementary medicine.
  • Understanding olfactory discrimination of essential oils is crucial for research applications.

Purpose of the Study:

  • To rank aromatic oils based on their airborne concentration and discriminability.
  • To identify essential oils suitable for research based on scent perception.

Main Methods:

  • University undergraduates (n=200) rank-ordered 8 aromatic oils.
  • Participants discriminated between 5, 10, and 20 microliter concentrations of each oil.
  • 25 participants assessed each oil sample.

Main Results:

  • Cardamom, rosemary, and ylang ylang oils showed high discriminability.

Related Experiment Videos

  • Chamomile, cypress, geranium, jasmine, and lavender oils were not significantly different from chance in discrimination.
  • Concentration differences were not a significant factor for most oils.

    • Conclusions:

    • Cardamom, rosemary, and ylang ylang are recommended for research requiring distinct olfactory stimuli.
    • Oils with low discriminability present challenges for controlled aromatherapy studies.
    • These findings offer guidance for selecting appropriate aromatic oils in scientific research.