חיפוש מתקדם
Journal of Chromatography A
Yang, X., Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, United States
Zhu, W., Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, United States, Interdepartmental Toxicology Program, Iowa State University, Ames, IA, United States
Koziel, J.A., Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, United States, Department of Civil, Construction and Environmental Engineering, Iowa State University, Ames, IA, United States, Department of Food Science and Human Nutrition, Iowa State University, Ames, IA, United States
Cai, L., Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, United States
Jenks, W.S., Department of Chemistry, Iowa State University, Ames, IA, United States
Laor, Y., Agricultural Research Organization, Institute of Soil, Water and Environmental Sciences, Newe Ya'ar Research Center, Ramat-Yishay, Israel
van Leeuwen, J.H., Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, United States, Department of Civil, Construction and Environmental Engineering, Iowa State University, Ames, IA, United States, Department of Food Science and Human Nutrition, Iowa State University, Ames, IA, United States
Hoff, S.J., Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, United States
Aerial emissions of odorous volatile organic compounds (VOCs) are an important nuisance factor from livestock production systems. Reliable air sampling and analysis methods are needed to develop and test odor mitigation technologies. Quantification of VOCs responsible for livestock odor remains an analytical challenge due to physicochemical properties of VOCs and the requirement for low detection thresholds. A new air sampling and analysis method was developed for testing of odor/VOCs mitigation in simulated livestock emissions system. A flow-through standard gas generating system simulating odorous VOCs in livestock barn emissions was built on laboratory scale and tested to continuously generate ten odorous VOCs commonly defining livestock odor. Standard VOCs included sulfur VOCs (S-VOCs), volatile fatty acids (VFAs), and p-cresol. Solid-phase microextraction (SPME) was optimized for sampling of diluted odorous gas mixtures in the moving air followed by gas chromatography-mass spectrometry (GC-MS) analysis. CAR/PDMS 85. μm fiber was shown to have the best sensitivity for the target odorous VOCs. A practical 5-min sampling time was selected to ensure optimal extraction of VFAs and p-cresol, as well as minimum displacement of S-VOCs. Method detection limits ranged from 0.39 to 2.64. ppbv for S-VOCs, 0.23 to 0.77. ppbv for VFAs, and 0.31. ppbv for p-cresol. The method developed was applied to quantify VOCs and odorous VOC mitigation with UV light treatment. The measured concentrations ranged from 20.1 to 815. ppbv for S-VOCs, 10.3 to 315. ppbv for VFAs, and 4.73 to 417. ppbv for p-cresol. Relative standard deviations between replicates ranged from 0.67% to 12.9%, 0.50% to 11.4%, 0.83% to 5.14% for S-VOCs, VFAs, and p-cresol, respectively. This research shows that a simple manual SPME sampler could be used successfully for quantification of important classes of odorous VOCs at concentrations relevant for real aerial emissions from livestock operations. © 2015 Elsevier B.V.
פותח על ידי קלירמאש פתרונות בע"מ -
הספר "אוצר וולקני"
אודות
תנאי שימוש
Improved quantification of livestock associated odorous volatile organic compounds in a standard flow-through system using solid-phase microextraction and gas chromatography-mass spectrometry
1414
Yang, X., Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, United States
Zhu, W., Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, United States, Interdepartmental Toxicology Program, Iowa State University, Ames, IA, United States
Koziel, J.A., Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, United States, Department of Civil, Construction and Environmental Engineering, Iowa State University, Ames, IA, United States, Department of Food Science and Human Nutrition, Iowa State University, Ames, IA, United States
Cai, L., Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, United States
Jenks, W.S., Department of Chemistry, Iowa State University, Ames, IA, United States
Laor, Y., Agricultural Research Organization, Institute of Soil, Water and Environmental Sciences, Newe Ya'ar Research Center, Ramat-Yishay, Israel
van Leeuwen, J.H., Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, United States, Department of Civil, Construction and Environmental Engineering, Iowa State University, Ames, IA, United States, Department of Food Science and Human Nutrition, Iowa State University, Ames, IA, United States
Hoff, S.J., Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, United States
Improved quantification of livestock associated odorous volatile organic compounds in a standard flow-through system using solid-phase microextraction and gas chromatography-mass spectrometry
Aerial emissions of odorous volatile organic compounds (VOCs) are an important nuisance factor from livestock production systems. Reliable air sampling and analysis methods are needed to develop and test odor mitigation technologies. Quantification of VOCs responsible for livestock odor remains an analytical challenge due to physicochemical properties of VOCs and the requirement for low detection thresholds. A new air sampling and analysis method was developed for testing of odor/VOCs mitigation in simulated livestock emissions system. A flow-through standard gas generating system simulating odorous VOCs in livestock barn emissions was built on laboratory scale and tested to continuously generate ten odorous VOCs commonly defining livestock odor. Standard VOCs included sulfur VOCs (S-VOCs), volatile fatty acids (VFAs), and p-cresol. Solid-phase microextraction (SPME) was optimized for sampling of diluted odorous gas mixtures in the moving air followed by gas chromatography-mass spectrometry (GC-MS) analysis. CAR/PDMS 85. μm fiber was shown to have the best sensitivity for the target odorous VOCs. A practical 5-min sampling time was selected to ensure optimal extraction of VFAs and p-cresol, as well as minimum displacement of S-VOCs. Method detection limits ranged from 0.39 to 2.64. ppbv for S-VOCs, 0.23 to 0.77. ppbv for VFAs, and 0.31. ppbv for p-cresol. The method developed was applied to quantify VOCs and odorous VOC mitigation with UV light treatment. The measured concentrations ranged from 20.1 to 815. ppbv for S-VOCs, 10.3 to 315. ppbv for VFAs, and 4.73 to 417. ppbv for p-cresol. Relative standard deviations between replicates ranged from 0.67% to 12.9%, 0.50% to 11.4%, 0.83% to 5.14% for S-VOCs, VFAs, and p-cresol, respectively. This research shows that a simple manual SPME sampler could be used successfully for quantification of important classes of odorous VOCs at concentrations relevant for real aerial emissions from livestock operations. © 2015 Elsevier B.V.
Scientific Publication
You may also be interested in