References of "Eppe, Gauthier"
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See detailEmpirical Relationship between Precision and Ultra-Trace Concentrations of Pcdd/Fs and Dioxin-Like Pcbs in Biological Matrices
Eppe, Gauthier ULg; Van Cleuvenbergen, Rudy; Smastuen Haug, Line et al

in Chemosphere (2008), 71(2), 379-87

Dioxin analysis in food and feed can be characterized as an analytical application where very high accuracy is required at very low levels of contamination. Gas chromatography (GC) in combination with (13 ... [more ▼]

Dioxin analysis in food and feed can be characterized as an analytical application where very high accuracy is required at very low levels of contamination. Gas chromatography (GC) in combination with (13)C-label isotope dilution (ID) high resolution mass spectrometry (HRMS) is the reference congener-specific technique characterized by pronounced selectivity, precision and trueness at parts-per-trillion (ppt) and sub-parts-per-trillion (sub-ppt) levels. The quality of the analytical data produced routinely by a laboratory should be adequate for its intended purpose, i.e., one will seek a compromise between the cost and time needed and the consequences of incorrect decisions due to erroneous results. The requirements for reproducibility are usually dependent on the analyte concentrations and have been expressed in various empirical functions. While Horwitz or modified functions are widely useful for many purposes, it would be difficult to expect these functions to cover every analytical problem. This study reports on precision characteristics achieved by the GC-ID-HRMS reference method for polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and dioxin-like polychlorinated biphenyls (DL-PCBs) in food and feed in two interlaboratory method-performance studies among expert laboratories with long-standing experience in this field. Striking linear functions in log scale between reproducibility standard deviation and congener's level over a concentration range of 10(-8)-10(-14)g per g fresh weight are observed. The data fit very well to a Horwitz-type function of the form s(R)=0.153c(0.904), where s(R) and c are dimensionless mass ratios expressed in pgg(-1) on fresh weight, regardless of the nature of the toxic congeners, food and feed matrices, or sample preparation methods. We demonstrate that the proposed function is suitable for use as a fitness-for-purpose criterion for proficiency assessment in interlaboratory comparisons on dioxins and related compounds in food. [less ▲]

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See detailSerum dioxin and PCB levels among PCB waste processing plant workers
Eppe, Gauthier ULg; Dupas, D.; Chisacof, I. et al

in Organohalogen Compounds (2008)

A clinical investigation and a biological monitoring were carried out to evaluate the occupational exposure of workers in contact with pyralen in a PCB-transformer and capacitor decontamination plant in ... [more ▼]

A clinical investigation and a biological monitoring were carried out to evaluate the occupational exposure of workers in contact with pyralen in a PCB-transformer and capacitor decontamination plant in France. The aim of this study was to assess the body burden of polychlorinated dibenzo-p- dioxin (PCDDs), polychlorinated dibenzofurans (PCDFs), dioxin-like (DL) PCBs and marker PCBs for those workers. We examined 8 representative workers (34-44 years old). The subjects of this study worked from 5 years to 19 years at the plant. All workers reported daily multiple contacts with various metal and wood parts of dismantled transformers during working hours. On a yearly basis, the exposed subjects were examined by the occupational health physician for a check-up. Basic parameters such as liver function and lipid statement were performed. [less ▲]

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See detailSerum dioxin and PCB levels among PCB waste processing plant workers
Eppe, Gauthier ULg; Dupas, D.; Chisacof, I. et al

in Organohalogen Compounds (2008), 70

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See detailLevels of PCDD/Fs and DL-PCBs in Belgian river eel specimen
Focant, Jean-François ULg; Geererts, C.; Eppe, Gauthier ULg et al

in Organohalogen Compounds (2008), 70

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See detailPersistent organochlorine pollutants, dioxins and polychlorinated biphenyls
Scippo, Marie-Louise ULg; Eppe, Gauthier ULg; Saegerman, Claude ULg et al

in Contaminant and Residue Analysis, Comprehensive Analytical Chemistry of Elsevier (2008)

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See detailAnalytical Measurement and Levelsof Dioxins and PCBs in Biological Samples
Focant, Jean-François ULg; Eppe, Gauthier ULg; De Pauw, Edwin ULg

in Faye, Bernard; Sinyavskiy, Youri (Eds.) Impact of Pollution on Animal Products (2008)

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See detailPCDD, PCDF AND PCB DETERMINATION IN DOLPHINS REVEALS A WORLD HOTSPOT FOR PCBS IN GUANABARA BAY, BRAZIL
Dorneles, Paulo; Lailson-Brito, José; Eppe, Gauthier ULg et al

in Organohalogen Compounds (2008), 70

The main objective of the present study was to determine the current concentrations of PCDDs, PCDFs and PCBs in dolphins from a region of high industrialization and urbanization in the Southern Hemisphere ... [more ▼]

The main objective of the present study was to determine the current concentrations of PCDDs, PCDFs and PCBs in dolphins from a region of high industrialization and urbanization in the Southern Hemisphere. Since most of these compounds biomagnify in food chains and changes in ratios of stable isotopes of nitrogen (15N/14N) have been used to elucidate trophic relationships 7, measurements of these isotopes have been carried out in marine tucuxi dolphins and their prey in Guanabara Bay. Stable isotopes were measured, firstly, to quantitatively assess the trophic level of the dolphin, and, secondly, to provide information for future human risk assessment investigations related to fish consumption [less ▲]

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See detailDioxin-like compounds in porpoises and seals from the southern North Sea: relationship with biological and ecological factors
Das, Krishna ULg; De Pauw, Edwin ULg; Eppe, Gauthier ULg et al

in Organohalogen Compounds (2008), 70

The North Sea represents a major ecosystem for the harbour porpoise (Phocoena phocoena) and the harbour seal (Phoca vitulina). The grey seal (Halichoerus grypus) occurs more occasionally in the southern ... [more ▼]

The North Sea represents a major ecosystem for the harbour porpoise (Phocoena phocoena) and the harbour seal (Phoca vitulina). The grey seal (Halichoerus grypus) occurs more occasionally in the southern part of the North Sea. Their population over this last decade has experienced major fluctuations likely linked to prey availability and seal epizootics. Despite being banned more than 30 years ago, levels of polychlorinated biphenyls (PCBs) in marine mammals are still of concern due to historical contamination of the North Sea. [less ▲]

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See detailANALYSIS OF DIOXINS AND DIOXIN-LIKE PCBS IN HOME PRODUCED EGGS: LEVELS AND SOURCES
Van Overmeire, Ilse; Eppe, Gauthier ULg; Waegeneers, Nadia et al

in Organohalogen Compounds (2008)

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See detailINTAKE OF DIOXINS AND DIOXIN-LIKE PCBs CONSUMING HOME PRODUCED VERSUS COMMERCIAL EGGS
Sioen, Isabelle; Bilau, Maaike; Van Overmeire, Ilse et al

in Organohalogen Compounds (2008)

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See detailValidation of the analytical procedure for the determination of polyaromatic hydrocarbons in smoke flavourings using high performance liquid chromatography coupled to an ultraviolet, diode array or fluorescence detector
Brasseur, Catherine ULg; Brose, François ULg; Pirlot, Alain ULg et al

in Accreditation and Quality Assurance (2007), 12(10), 535-542

High performance liquid chromatography (HPLC) coupled to an ultraviolet (UV), diode array or fluorescence detector (UV/DAD/FLD) has been used to set up an analytical procedure for the quantification of 16 ... [more ▼]

High performance liquid chromatography (HPLC) coupled to an ultraviolet (UV), diode array or fluorescence detector (UV/DAD/FLD) has been used to set up an analytical procedure for the quantification of 16 EU priority polyaromatic hydrocarbons (PAHs) in smoke flavourings. The following parameters have been determined for the 16 EU priority PAHs: limit of detection, limit of quantification, precision (repeatability and intermediate precision), recovery and measurement uncertainty, using the concept of accuracy profiles. They were in close agreement with quality criteria described in the Commission Regulation (EC) no. 627/2006 concerning PAHs in smoke flavourings. [less ▲]

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See detailExposure factors influencing serum dioxin concentrations in the French dioxin and incinerators study
Frery, N.; Zeghnoun, A.; Sarter, H. et al

in Organohalogen Compounds (2007), 69

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See detailConfounding factors influencing serum dioxin concentrations in the French dioxin and incinerators study
Frery, N.; Zegnoun, N.; Sarter, H. et al

in Organohalogen Compounds (2007), 69

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See detailDealing with the non-detected and non-quantified data. The example of the serum dioxin data in the French dioxin and incinerators study
Zeghnoun, A.; Pascal, M.; Frery, N. et al

in Organohalogen Compounds (2007), 69

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