Multidimensional Gas Chromatography-Olfactometry for the Identification and Prioritization of Malodors from Confined Animal Feeding Operations
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- 作者：Donald W. Wright ; David K. Eaton ; Lawrence T. Nielsen ; Fred W. Kuhrt ; Jacek A. Koziel ; Jarett P. Spinhirne ; and David B. Parker
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2005
- 出版时间：November 2, 2005
- 年：2005
- 卷：53
- 期：22
- 页码：8663 - 8672
- 全文大小：748K
- 年卷期：v.53,no.22(November 2, 2005)
- ISSN：1520-5118
文摘
Odor profiling efforts were directed at applying to high-density livestock operations some of the lessonslearned in resolving past, highly diverse, odor-focused investigations in the consumer product industry.Solid-phase microextraction (SPME) was used for field air sampling of odorous air near and downwindof a beef cattle feedyard and a swine finisher barn in Texas. Multidimensional gas chromatography-olfactometry (MDGC-O) was utilized in an attempt to define and prioritize the basic building blocksof odor character associated with these livestock operations. Although scores of potential odorantvolatiles have been previously identified in high-density livestock operations, the odor profile resultsdeveloped herein suggest that only a very few of these may constitute the preponderance of theodor complaints associated with these environments. This appeared to be especially true for thecase of increasing distance from both cattle feedyard and swine barn facilities, with p-cresolconsistently taking on the dominant odor impact role with ever increasing distance. In contrast, at- ornear-site odor profiles were shown to be much more complex, with many of the well-known lower tierodorant compounds rising in relative significance. For the cattle feedyard at- or near-site odor profiles,trimethylamine was shown to represent a significantly greater individual odor impact relative to themore often cited livestock odorants such as hydrogen sulfide, the organic sulfides, and volatile fattyacids. This study demonstrates that SPME combined with a MDGC-O-mass spectrometry systemcan be used for the sampling, identification, and prioritization of odors associated with livestock.Keywords: Odor; livestock; gas chromatography-olfactometry; solid-phase microextraction; multidimensional gas chromatography-mass spectrometry; volatile organic compounds; p-cresol