کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4409158 | 1307466 | 2013 | 6 صفحه PDF | دانلود رایگان |
• A pharmacokinetic model was combined with a probabilistic model to gain a decision tool for risk management.
• The German dioxin incident of winter 2010/2011 can be described by the tool.
• Clearing rates for the congener 1,2,3,4,7,8-HxCDD were determined from experimental data (Hoogenboom et al., 2004).
• The approach demonstrated here is a showcase how a risk assessment in the case of contaminated feeding can be performed.
When food producing animals are contaminated with PCDD/F congeners, information on the contaminant’s concentration in the bodies of the animals at time of slaughter is needed for risk management purposes. We have developed a mathematical model for the kinetics of PCDD/Fs in growing pigs in case of contaminated feed fed for a limited duration of time. This model allows the prediction of concentrations in body fat. It considers absorption fractions of PCDD/Fs, clearance by metabolism, dilution by growth and excretion through fecal fat. The model parameters were calibrated by fitting the model to experimental data. On the basis of this toxicokinetic model a probabilistic model has been constructed. The probabilistic model handles the parameters with appropriate probability distributions and Monte-Carlo simulation technique, providing for realistic situations with many animals and a range of contaminations and feeding intervals. We applied the new model to describe the German dioxin incident of winter 2010/2011 and discuss its viability as decision tool. The approach demonstrated here is a showcase how a risk assessment in the case of contaminated feeding can be performed.
Journal: Chemosphere - Volume 93, Issue 3, September 2013, Pages 474–479