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Food Chem

Title:		Method for sampling and analysis of volatile biomarkers in process gas from aerobic digestion of poultry carcasses using time-weighted average SPME and GC-MS
Author(s):		Koziel JA; Nguyen LT; Glanville TD; Ahn H; Frana TS; Hans van Leeuwen J;
Address:		"Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA; Department of Civil, Construction and Environmental Engineering, Iowa State University, Ames, IA 50011, USA; Department of Food Science and Human Nutrition, Iowa State University, Ames, IA 50011, USA. Electronic address: koziel@iastate.edu. Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA. Department of Animal Biosystems Science, Chungnam National University, Daejeon, Republic of Korea. Department of Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA, USA. Department of Civil, Construction and Environmental Engineering, Iowa State University, Ames, IA 50011, USA; Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, USA; Department of Food Science and Human Nutrition, Iowa State University, Ames, IA 50011, USA"
Journal Title:		Food Chem
Year:		2017
Volume:		20170412
Issue:
Page Number:		799 - 807
DOI:		10.1016/j.foodchem.2017.04.062
ISSN/ISBN:		1873-7072 (Electronic) 0308-8146 (Linking)
Abstract:		"A passive sampling method, using retracted solid-phase microextraction (SPME) - gas chromatography-mass spectrometry and time-weighted averaging, was developed and validated for tracking marker volatile organic compounds (VOCs) emitted during aerobic digestion of biohazardous animal tissue. The retracted SPME configuration protects the fragile fiber from buffeting by the process gas stream, and it requires less equipment and is potentially more biosecure than conventional active sampling methods. VOC concentrations predicted via a model based on Fick's first law of diffusion were within 6.6-12.3% of experimentally controlled values after accounting for VOC adsorption to the SPME fiber housing. Method detection limits for five marker VOCs ranged from 0.70 to 8.44ppbv and were statistically equivalent (p>0.05) to those for active sorbent-tube-based sampling. The sampling time of 30min and fiber retraction of 5mm were found to be optimal for the tissue digestion process"
Keywords:		Animals Biomarkers/*analysis Gas Chromatography-Mass Spectrometry *Poultry Solid Phase Microextraction Volatile Organic Compounds Aerobic digestion Animal mortalities Biomarkers Dimethyl disulfide (PubChem CID: 12232) Dimethyl trisulfide (PubChem CID: 193;
Notes:		"MedlineKoziel, Jacek A Nguyen, Lam T Glanville, Thomas D Ahn, Heekwon Frana, Timothy S Hans van Leeuwen, J eng England 2017/05/12 Food Chem. 2017 Oct 1; 232:799-807. doi: 10.1016/j.foodchem.2017.04.062. Epub 2017 Apr 12"