Comparison of Olfactometry, Gas Chromatography, and Electronic Nose Technology for Measurement of Indoor Air from Swine Facilities

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2001-01-01
Authors
Gralapp, A.
Powers, W.
Bundy, Dwaine
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Altmetrics
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Abstract

Indoor air from swine finishing facilities was analyzed by olfactometry, gas chromatography (GC), and an electronic nose. Olfactometry used dynamic dilution triangular forced-choice. Air samples collected in Tedlar bags were analyzed using an AromaScan A32S electronic nose. Sixteen compounds, primarily nonsulfur protein metabolites were quantified by GC/mass spectrometry (MS) and an equation was generated to predict odor dilution threshold (R2 < .3). Electronic nose evaluation of room air samples was not strongly correlated to olfactometry measures (r < .2). However, the equation developed from the GC/MS analyses was capable of predicting the electronic nose response to air samples (R2 > .8).

The results suggest that human panelist responses may be based on detection of compounds that were not included in GC/MS quantification procedures and are not well detected by the electronic nose.

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