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Quantification of Odorants from TedlarTM Bags

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  024165,  2002 ASAE Annual Meeting . (doi: 10.13031/2013.10520) @2002
Authors:   Kevin M. Keener, Junhua Zhang, Robert W. Bottcher, Roberto D. Munilla
Keywords:   swine, air, volatile compounds, gas chromatography, TedlarTM bag

Tri-packed sorbent tubes and TedlarTM bags were compared in characterizing nineteen major odorants found in artificial swine odor. The sorbent tubes were packed with Tenax-TATM, Carboxen 1000TM and Carbosieve SIIITM. Artificial swine odor was directly desorbed onto the tri-packed sorbent tube. For comparison, a 10L TedlarTM bag was filled with nitrogen gas and artificial swine odor. The TedlarTM bag was then desorbed onto the tri-packed sorbent tube, which was subsequently thermally desorbed into a gas chromatography (GC) system with a flame ionization detector (FID). The tri-packed sorbent tube demonstrated recoveries greater than 74% and detection limits less than 0.4 ng for all nineteen odorants. TedlarTM bags showed excellent recoveries for volatile fatty acids (VFAs), but less than 12% for indole and skatole. In addition, TedlarTM bags emitted acetic acid (~ 35%) and phenol (~ 27%). These results suggest that air samples collected in TedlarTM bags may bias olfactory analysis.

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