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Forensic Sci Med Pathol

Title:		Detection of decomposition volatile organic compounds in soil following removal of remains from a surface deposition site
Author(s):		Perrault KA; Stefanuto PH; Stuart BH; Rai T; Focant JF; Forbes SL;
Address:		"Centre for Forensic Science, University of Technology Sydney (UTS), PO Box 123, Broadway, NSW, 2007, Australia, katelynn.perrault@uts.edu.au"
Journal Title:		Forensic Sci Med Pathol
Year:		2015
Volume:		20150731
Issue:		3
Page Number:		376 - 387
DOI:		10.1007/s12024-015-9693-5
ISSN/ISBN:		1556-2891 (Electronic) 1547-769X (Linking)
Abstract:		"PURPOSE: Cadaver-detection dogs use volatile organic compounds (VOCs) to search for human remains including those deposited on or beneath soil. Soil can act as a sink for VOCs, causing loading of decomposition VOCs in the soil following soft tissue decomposition. The objective of this study was to chemically profile decomposition VOCs from surface decomposition sites after remains were removed from their primary location. METHODS: Pig carcasses were used as human analogues and were deposited on a soil surface to decompose for 3 months. The remains were then removed from each site and VOCs were collected from the soil for 7 months thereafter and analyzed by comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (GCxGC-TOFMS). RESULTS: Decomposition VOCs diminished within 6 weeks and hydrocarbons were the most persistent compound class. Decomposition VOCs could still be detected in the soil after 7 months using Principal Component Analysis. CONCLUSIONS: This study demonstrated that the decomposition VOC profile, while detectable by GCxGC-TOFMS in the soil, was considerably reduced and altered in composition upon removal of remains. Chemical reference data is provided by this study for future investigations of canine alert behavior in scenarios involving scattered or scavenged remains"
Keywords:		"Animals Gas Chromatography-Mass Spectrometry Models, Animal *Postmortem Changes Principal Component Analysis Soil/*chemistry Swine Volatile Organic Compounds/*analysis;"
Notes:		"MedlinePerrault, Katelynn A Stefanuto, Pierre-Hugues Stuart, Barbara H Rai, Tapan Focant, Jean-Francois Forbes, Shari L eng Research Support, Non-U.S. Gov't 2015/08/01 Forensic Sci Med Pathol. 2015 Sep; 11(3):376-87. doi: 10.1007/s12024-015-9693-5. Epub 2015 Jul 31"