References of "Focant, Jean-François"
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See detailReducing variation in decomposition odour profiling using comprehensive two-dimensional gas chromatography
Perrault, Katelynn A.; Stefanuto, Pierre-Hugues ULg; Stuart, Barbara H. et al

in Journal of Separation Science (2015), 38(1), 73-80

Challenges in decomposition odour profiling have led to variation in the documented odour profile by different research groups worldwide. Background subtraction and use of controls are important ... [more ▼]

Challenges in decomposition odour profiling have led to variation in the documented odour profile by different research groups worldwide. Background subtraction and use of controls are important considerations given the variation introduced by decomposition studies conducted in different geographical environments. The collection of volatile organic compounds from soil beneath decomposing remains is challenging due to the high levels of inherent soil volatile organic compounds, further confounded by the use of highly sensitive instrumentation. This study presents a method that provides suitable chromatographic resolution for profiling decomposition odour in soil by comprehensive two-dimensional gas chromatography with time of flight mass spectrometry using appropriate controls and field blanks. Logarithmic transformation and t-testing of compounds permitted the generation of a compound list of decomposition volatile organic compounds in soil. Principal component analysis demonstrated the improved discrimination between experimental and control soil, verifying the value of the data handling method. Data handling procedures have not been well documented in this field and standardisation would thereby reduce misidentification of volatile organic compounds present in the surrounding environment as decomposition byproducts. Uniformity of data handling and instrumental procedures will reduce analytical variation, increasing confidence in the future when investigating the effect of taphonomic variables on the decomposition volatile organic compound profile. [less ▲]

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See detailUltra-trace measurement of Dechloranes to investigate food as a route of human exposure
Calaprice, Chiara ULg; L'Homme, Benjamin; Calvano, Cosiam Damiana et al

in Chemosphere (2015)

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See detailOptimization of a new dioxin/PCB clean-up and fractionation procedure for an existing automated system
Calaprice, Chiara ULg; L'Homme, Benjamin; Calvano, Cosima Damiana et al

in Organohalogen Compounds (2015)

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See detailFatty Matrices Cleaned-up with a Different Approach
Calaprice, Chiara ULg; Focant, Jean-François ULg

Scientific conference (2015)

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See detailAnalytical Highlights 2015
Focant, Jean-François ULg

Conference (2015)

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See detailLaboratoire de chimie analytique organique et biologique - Part 1
Focant, Jean-François ULg

in Bulletin ACLg (2014)

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See detailComparison of the Decomposition VOC Profile during Winter and Summer in a Moist, Mid-latitude (Cfb) Climate
Forbes, Shari L.; Perrault, Katelynn A.; Stefanuto, Pierre-Hugues ULg et al

in PLoS ONE (2014), 9(e113681), 1-11

The investigation of volatile organic compounds (VOCs) associated with decomposition is an emerging field in forensic taphonomy due to their importance in locating human remains using biological detectors ... [more ▼]

The investigation of volatile organic compounds (VOCs) associated with decomposition is an emerging field in forensic taphonomy due to their importance in locating human remains using biological detectors such as insects and canines. A consistent decomposition VOC profile has not yet been elucidated due to the intrinsic impact of the environment on the decomposition process in different climatic zones. The study of decomposition VOCs has typically occurred during the warmer months to enable chemical profiling of all decomposition stages. The present study investigated the decomposition VOC profile in air during both warmer and cooler months in a moist, mid-latitude (Cfb) climate as decomposition occurs year-round in this environment. Pig carcasses (Sus scrofa domesticus L.) were placed on a soil surface to decompose naturally and their VOC profile was monitored during the winter and summer months. Corresponding control sites were also monitored to determine the natural VOC profile of the surrounding soil and vegetation. VOC samples were collected onto sorbent tubes and analyzed using comprehensive two-dimensional gas chromatography – time-of-flight mass spectrometry (GC6GC-TOFMS). The summer months were characterized by higher temperatures and solar radiation, greater rainfall accumulation, and comparable humidity when compared to the winter months. The rate of decomposition was faster and the number and abundance of VOCs was proportionally higher in summer. However, a similar trend was observed in winter and summer demonstrating a rapid increase in VOC abundance during active decay with a second increase in abundance occurring later in the decomposition process. Sulfur-containing compounds, alcohols and ketones represented the most abundant classes of compounds in both seasons, although almost all 10 compound classes identified contributed to discriminating the stages of decomposition throughout both seasons. The advantages of GC6GC-TOFMS were demonstrated for detecting and identifying trace levels of VOCs, particularly ethers, which are rarely reported as decomposition VOCs. [less ▲]

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See detailDeveloping the sixth sense of thanato-chemistry
Stefanuto, Pierre-Hugues ULg; Perrault, Katelynn; Varlet, Vincent et al

Scientific conference (2014, November)

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See detailApplication of multi-dimensional GC techniques to the analysis of cigarette smoke
Ticha, J; Bishop, L; Brokl, M et al

Conference (2014, September)

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See detailEstablishing the persistence of an odour signature in decomposition soil
Perrault, Katelynn ULg; Stefanuto, Pierre-Hugues ULg; Stuart, BH et al

Conference (2014, August)

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See detailTaking Cadaveric Decomposition Chemistry out of Flatland
Stefanuto, Pierre-Hugues ULg; Perrault, K; Stadler, S et al

Conference (2014, July 07)

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See detailThe Sweet Smell of Science
Stefanuto, Pierre-Hugues ULg; Focant, Jean-François ULg

Scientific conference (2014, July)

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