Next Article in Journal
Acoustic Transmitters for Underwater Neutrino Telescopes
Next Article in Special Issue
Electronic Nose Based on Independent Component Analysis Combined with Partial Least Squares and Artificial Neural Networks for Wine Prediction
Previous Article in Journal / Special Issue
Fast Direct Injection Mass-Spectrometric Characterization of Stimuli for Insect Electrophysiology by Proton Transfer Reaction-Time of Flight Mass-Spectrometry (PTR-ToF-MS)
Sensors 2012, 12(4), 4105-4112; doi:10.3390/s120404105

Effect of Functional Group and Carbon Chain Length on the Odor Detection Threshold of Aliphatic Compounds

Department of Applied Statistics, Universidad Polit├ęcnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain
Received: 30 January 2012 / Revised: 20 March 2012 / Accepted: 22 March 2012 / Published: 27 March 2012
View Full-Text   |   Download PDF [214 KB, uploaded 21 June 2014]   |   Browse Figures


Odor detection thresholds (ODTs) are used for assessing outdoor and indoor air quality. They are obtained experimentally by olfactometry and psychophysical methods, and large compilations are available in the literature. A non-linear regression equation was fitted to describe the ODT variability of 114 aliphatic compounds based on the alkyl chain length for different homologous series (carboxylic acids, aldehydes, 2-ketones, esters, 1-alcohols, amines, thiols, thioethers and hydrocarbons). The resulting equation reveals an effect of the functional group, molecular size and also an interaction between both factors. Although the mechanistic interpretation of results is uncertain, the relatively high goodness-of-fit (R2 = 0.90) suggests that ODT values of aliphatic compounds can be predicted rather accurately, which is not the case for rigid molecules. This equation may serve as a basis for the development of more complex ODT models taking into account diverse structural features of odorants. The variability of power-law exponents was also investigated for the homologous series.
Keywords: olfaction; VOC; odorant; olfactometry; psychophysics olfaction; VOC; odorant; olfactometry; psychophysics
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Supplementary material


Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote |
MDPI and ACS Style

Zarzo, M. Effect of Functional Group and Carbon Chain Length on the Odor Detection Threshold of Aliphatic Compounds. Sensors 2012, 12, 4105-4112.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here


[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert