Ractopamine analysis in pig kidney, liver and lungs: a validation of the method scope extension using QuEChERS as a sample preparation step - Feddern, Vivian; Aroeira, Carolina Naves; Molognoni, Luciano; Gressler, Vanessa; Daguer, Heitor; Dalla Costa, Osmar Antonio; Castillo, Carmen Josefina Contreras; Lima, Gustavo Julio Mello Monteiro de (Journal of Chromatography B, 2018)