References of "Focant, Jean-François"
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See detailDioxin levels in fertilizers from Belgium: Determination and evaluation of the potential impact on soil contamination
Elskens, M; Pussemier, L; Dumortier, P et al

in Science of the Total Environment (2013), 454-455

Dioxins are harmful Persistent Organic Pollutants (POPs) to which humans are exposed mostly via the consumption of animal products. They can enter the food chain at any stage, including crop fertilization ... [more ▼]

Dioxins are harmful Persistent Organic Pollutants (POPs) to which humans are exposed mostly via the consumption of animal products. They can enter the food chain at any stage, including crop fertilization. Fertilizers belong to several categories: synthetic chemicals providing the essential elements (mostly N, P and K) that are required by the crops but also organic fertilizers or amendments, liming materials, etc. Ninety-seven samples of fertilizers were taken in Belgium during the year 2011 and analyzed after a soft extraction procedure for polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and dioxin-like polychlorinated biphenyls (DL-PCBs) using GC-IDHRMS. Only small qualitative differences could be observed between the main fertilizer categories since the PCDD:PCDF:DL-PCB average ratio obtained with the results expressed in WHO 2005-TEQ was often close to 30:30:40 (typically for sewage sludge) or 40:30:30 (typically for compost). The median dioxin levels determined were generally lower than recorded previously and were the highest for sewage sludge and compost (5.6 and 5.5 ng TEQ/kg dry weight (dw), respectively). The levels in other fertilizers were lower including manure for which the median value was only 0.2 ng TEQ/kg dw. Several fertilization scenarios relying on the use of those fertilizers were assessed taking into consideration the application conditions prevailing in Belgium. From this assessment it could be concluded that the contribution of fertilizers to the overall soil contamination will be low by comparison of other sources of contamination such as atmospheric depositions. At the field scale, intensive use of compost and sewage sludge will increase dramatically the dioxin inputs compared with other fertilization practices but this kind of immission to the soil will still be relatively low compared to the dioxin atmospheric depositions. [less ▲]

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See detailLevels of polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and polychlorinated biphenyls in human milk from different regions of France
Focant, Jean-François ULg; Fréry, N; Bidondo, ML et al

in Science of the Total Environment (2013), 452-453

Wereport on the pilot study carried out before the start of the Elfe project (French longitudinal study from childhood). A total of 44 samples of mature human milk were collected at home 8 weeks after ... [more ▼]

Wereport on the pilot study carried out before the start of the Elfe project (French longitudinal study from childhood). A total of 44 samples of mature human milk were collected at home 8 weeks after delivery. A total of 7 polychlorinated dibenzo-p-dioxins (PCDDs), 10 polychlorinated dibenzofurans (PCDFs), 12 dioxin-like (DL) polychlorinated biphenyls (PCBs), and 6 non dioxin-like (NDL)-PCBs were measured. For total TEQ (PCDD/Fs and DL-PCBs), the geometric mean concentration was 17.81 pg TEQWHO05/g lipids. Relative PCDD, PCDF, and DL-PCB contributions to the arithmetic mean TEQWHO05 were 38%, 18%, and 44%, respectively. The use of TEFWHO05 instead of TEFWHO98 resulted in a 27% reduction of the total TEQ value. Although PCDD levels did not significantly change (less than 0.5% increase), PCDF and DL-PCB levels both decreased by 35% and 38%, respectively. Levels have been compared to data obtained during a previous non-reported national study conducted in 1998 (TEFWHO98) in French lactaria (n = 244). The mean of PCDD/Fs has decreased about 39.4% (18.8 pg TEQWHO98/g lipids in 1998 vs 11.4 pg TEQWHO98/g lipids in pilot study), respectively 41.5% for PCDDs (10.6 pg TEQWHO98/g lipids in 1998 vs 6.2 pg TEQWHO98/g lipids in pilot study) and 36.7% for PCDFs (7.9 pg TEQWHO98/g lipids in 1998 vs 5.0 pg TEQWHO98/g lipids in pilot study). For the sum of the 6 NDL-PCBs, the 2007 geometric mean concentration in milk was 176.3 ng/g lipids. The arithmetic mean lipid concentration in 2007 breast milk was 26.4 g/l (range from 6.0 to 46.7 g/l). A PCDD/F and DL-PCB daily intake was estimated to be 62.3 pg TEQWHO05/kg body weight per day (85.0 pg TEQWHO98/kg bodyweight per day) for a baby of 5 kg of bodyweight fed daily with 700 ml of maternal milk containing 25 g/l of lipids. [less ▲]

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See detailMilk and serum standard reference materials for monitoring organic contaminants in human samples
Schantz; Eppe, Gauthier ULg; Focant, Jean-François ULg et al

in Analytical and Bioanalytical Chemistry (2013), 405

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See detailVers une meilleure caractérisation des étapes de décomposition cadavérique
Focant, Jean-François ULg

in Bulletin d'information: Toxicologie médico-légale. Questions ouvertes (2012), (11), 1-2

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See detailOptimization of POP analysis in small sample amounts.
L'Homme, Benjamin ULg; Focant, Jean-François ULg

Conference (2012, October)

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See detailDeveloping the Sixth Sense
Focant, Jean-François ULg

in The Column (2012), 8(18), 2-5

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See detailGCxGC-TOFMS for VOC Analyses: Forensic and Medical Applications
Focant, Jean-François ULg

Conference (2012, October)

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See detailAdvances in blood spots analysis for selected POPs using MEPS
L'Homme, Benjamin ULg; Focant, Jean-François ULg

Scientific conference (2012, September)

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See detailLes experts ont le nez fin
Focant, Jean-François ULg

Speech (2012)

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See detailGCxGC-TOFMS for Bioanalytical Applications
Focant, Jean-François ULg

Scientific conference (2012, September)

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See detailDioxin Food Crises and New POPs: Challenges in Analyses
Focant, Jean-François ULg

Conference (2012, September)

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See detailMeasurement of human levels of Dechlorane 602 by CZC-NCI-HRTOFMS
Brasseur, Catherine ULg; PIRARD, Catherine ULg; L'Homme, Benjamin ULg et al

in Organohalogen Compounds (2012, August), 74

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See detailGrave Soils Analysis by TD-GCxGC-TOFMS
Stefanuto, Pierre-Hugues ULg; Scotsmans, E. M.J.; Wilson, A. S. et al

Conference (2012, August)

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See detailEvolution in the Sample Preparation for the Measurement of POPs in Biological Matrices
Focant, Jean-François ULg

Scientific conference (2012, August)

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See detailAnalytical criteria for use of MS/MS for determination of dioxins and dioxin-like PCBs in feed and food
Kotz, A; Malisch, R; Focant, Jean-François ULg et al

in Organohalogen Compounds (2012, August), 74

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See detailGCxGC-TOFMS for Bioanalytical Applications
Brasseur, Catherine ULg; L'Homme, Benjamin ULg; Stefanuto, Pierre-Hugues ULg et al

Scientific conference (2012, August)

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