“…LC-MS/MS has been utilised in studies examining nitrofuran parent drugs and their metabolite contamination in eggs (Finzi et al, 2005;Szilagyi and de la Calle, 2006;Bock et al, 2007a), poultry (Finzi et al, 2005;Verdon et al, 2007), porcine tissue (McCracken et al, 1995;McCracken and Kennedy, 1997a;Leitner et al, 2001) as well as fish feed (Hu et al, 2007).…”