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Cadaveric volatile organic compounds released by decaying pig carcasses (Sus domesticus L.) in different biotopes.

Forensic science international (2009-05-09)
J Dekeirsschieter, F J Verheggen, M Gohy, F Hubrecht, L Bourguignon, G Lognay, E Haubruge
ABSTRACT

Forensic entomology uses pig carcasses to surrogate human decomposition and to investigate the entomofaunal colonization. Insects communicate with their environment through the use of chemical mediators, which in the case of necrophagous insects, may consist in the cadaveric volatile organic compounds (VOCs) released by the corpse under decomposition. Previous studies have focused on cadaveric VOCs released from human corpses. Nevertheless, studies on human corpses are restricted for many reasons, including ethics. Forensic entomologists use pig as animal model but very few information are available about the decompositional VOCs released by a decaying pig carcass. We here tested a passive sampling technique, the Radiello diffusive sampler, to monitor the cadaveric VOCs released by decomposing pig carcasses in three biotopes (crop field, forest, urban site). A total of 104 chemical compounds, exclusively produced by the decompositional process, were identified by thermal desorption interfaced with gas chromatography and mass spectrometry (TDS-GC-MS). Ninety, 85 and 57 cadaveric VOCs were identified on pig carcasses laying on the agricultural site, the forest biotope and in the urban site, respectively. The main cadaveric VOCs are acids, cyclic hydrocarbons, oxygenated compounds, sulfur and nitrogen compounds. A better knowledge of the smell of death and their volatile constituents may have many applications in forensic sciences.

MATERIALS
Product Number
Brand
Product Description

radiello Empty Storage Tubes, glass (with stopper), volume 2.8 mL, pk of 100
radiello 1,3-Butadiene Starter Kit, Thermal Desorption, pkg of 1 kit (2 RAD141 adsorbing cartridges and barcode labels, 1 RAD1202 yellow diffusive body, 1 RAD121 triangular support plate, 1 instruction sheet)
radiello Hydrogen Sulfide Starter Kit
radiello BTEX/VOC Starter Kit, Thermal Desorption
Supelco
radiello BTEX Calibration Kit (Thermal Desorption)
Supelco
radiello Aldehyde Calibration Standard, 50 μg/mL each component in acetonitrile, pkg of 10 mL
Supelco
radiello BTEX Calibration Kit (CS2 Desorption)
Supelco
radiello VOC Calibration Kit (Workplace Environment)
radiello Empty Storage Tubes, polypropylene (with stopper), volume 12 mL, pk of 100
radiello Clips, suspending Radiello triangular support plate, pk of 20
radiello On-Field Thermometer, configured for ready-to-use (rtu) samplers, Include one rtu vertical adapter for each thermometer, pk of 3
radiello Diffusive Bodies, white, configured for general use, pk of 20
radiello On-Field Thermometer, Reader, pk of 1
radiello Diffusive Bodies, blue, configured for sampling light sensitive compounds, pk of 20
Supelco
radiello Methylene Blue Calibration Standard for H2S (Hydrogen Sulfide), pkg of 100 mL
radiello On-Field Thermometer, Includes one standard Radiello vertical adapter (RAD122) for each thermometer, configured for standard use, pk of 3
radiello Diffusive Bodies, yellow, configured for reduced sampling rates, pk of 20
radiello Diffusive Bodies, permeative, configured for anaesthetic gases and vapors, pk of 20
radiello BTEX/VOC Starter Kit, CS2 Desorption
radiello Filtration Kit, pk of 20
radiello Cartridge Adsorbents, for sampling BTEX and VOCs (thermal desorption), matrix SS net (3 x 8 μm, 4.8 mm diam.), Carbograph, pk of 20
radiello Cartridge Adsorbents, for sampling Aldehydes, matrix SS net with 2,4-DNPH coated FLORISIL®, pk of 20
radiello Cartridge Adsorbents, for sampling Ammonia (NH3), matrix microporous PE impregnated with phosphoric acid, pk of 20
radiello Barcode Labels, pk of 198
radiello Anesthetic Gases and Vapor Sampler
radiello Replacement Mounting Strips, for use with Radiello Outdoor Shelter, pk of 100
radiello Vertical Adapter, threaded for standard use, pk of 20
radiello Cartridge Adsorbents, for sampling BTEX and VOCs (CS2 Desorption), matrix SS net (100 mesh, 5.8 mm diam.), activated with activated charcoal (30-50 mesh), pk of 20
radiello Outdoor Shelter, pk of 10
radiello Cartridge Adsorbents, for sampling Anaesthetic Gases/Vapors, matrix SS net with mix of mol sieve and activated charcoal (30-50 mesh), pk of 20