PCBs-Dioxins bioaccumulation

["De Pauw Edwin" <e.depauw@ulg.ac.be>]

Two questions are submitted to the list users

1 Does anyone have data and references concerning the relative
bio-accumulation of PCBs, coplanar PCBs, dioxins and furanes along the food
chain from contaminated animal feedstock to final products such as milk and
meat?
2 How reliable is the monitoring of dioxins through the monitoring of PCBs
in the case of contamination by of feedstock by PCBs ? In the primary
feedstock, it should work properly but what can be be concluded later in the
food chain ?

thanks