EUR 23711 EN - 2009 Report of the fifth interlaboratory comparison organised by the Community Reference Laboratory for Heavy Metals in Feed and Food Total Cd, Pb and As and extractable Cd and Pb in mineral feed M.B. de la Calle, I. Wysocka, C. Quétel, T. Linsinger, H. Emteborg, F. Cordeiro, A. Semeraro, I. Verbist, D. Vendelbo, P. Taylor