PT-2014-NRL-TE-FASFC Determination of Cu, Zn, As, Asi, Cd and Pb in wine. Final report on the 2014 interlaboratory comparison organised by the National Reference Laboratory for Trace Elements in Food and Feed , Cheyns, Karlien, and Waegeneers Nadia , 10/02/2014, Tervuren, Belgium, p.27, (2014)