Simple Purification and Ultrahigh-Pressure Liquid Chromatography–Tandem Mass Spectrometry Determination of Five Quinoxaline 1,4-dioxides and their Metabolites in Swine LiverByYehui Luan,Junjie Zhao,Kexin Chen,Yiyan Wang,Linli ChengOctober 1st 2021The UHPLC–MS/MS method can accurately determine the presence of these illegal feed additives in swine tissues.