| Title: | The application of thermal desorption GC/MS with simultaneous olfactory evaluation for the characterization and quantification of odor compounds from a dairy |
| Author(s): | Rabaud NE; Ebeler SE; Ashbaugh LL; Flocchini RG; |
| Address: | "Crocker Nuclear Laboratory and Department of Viticulture and Enology, University of California, One Shields Avenue, Davis 95616, USA. nerabaud@ucdavis.edu" |
| ISSN/ISBN: | 0021-8561 (Print) 0021-8561 (Linking) |
| Abstract: | "Few analytical methods exist that combine chemical and sensory analysis of odorous compounds in whole air. Volatile organic compounds were collected by sampling air downwind from a small dairy through sorbent tubes of Tenax TA and Carboxen 569. Samples were analyzed by thermal desorption into a cryotrap and subsequent gas chromatographic separation, followed by simultaneous olfactometry and mass spectrometry. Because compounds are concentrated during sampling, sensory analysis encountered compounds at a concentration 40 times that in air, making this a useful method for identifying trace compounds participating in odor. Twenty odorous and nonodorous compounds were identified and quantified, including straight-chain and aromatic hydrocarbons, chlorinated compounds, alcohols, ketones, aldehydes, and organic acids, at air concentrations of 0.55-320.20 microg/m(3). Compound peaks were characterized by odors ranging from offensive to pleasant, demonstrating the integrative nature of olfaction. This method could be useful in studying many kinds of odors in air" |
| Keywords: | Animals *Cattle *Dairying Gas Chromatography-Mass Spectrometry/*methods Hot Temperature Humans *Odorants *Smell Solutions; |
| Notes: | "MedlineRabaud, Nicole E Ebeler, Susan E Ashbaugh, Lowell L Flocchini, Robert G eng Research Support, Non-U.S. Gov't 2002/08/22 J Agric Food Chem. 2002 Aug 28; 50(18):5139-45. doi: 10.1021/jf020204u" |
