“…The most used methods for their determination are liquid chromatography with tandem mass spectrometry (LC-MS/MS) [ 1 , 2 , 3 , 4 ], liquid chromatography with electrochemical detection (LC-ECD) [ 13 , 14 , 15 ] and liquid chromatography with ultraviolet (LC-UV) or fluorometric detection (LC-FLD) [ 16 , 17 , 18 , 19 , 20 ].…”