The method of analysis to be used for monitoring is preferably high performance liquid chromatography — mass spectrometry/(mass spectrometry) (HPLC-MS/(MS)) or, if HPLC-MS/(MS) is not possible, gas chromatography — mass spectrometry (GC-MS).
De aanbevolen analysemethode voor de monitoring is hogedrukvloeistofchromatografie-massaspectrometrie/(massaspectrometrie) (HPLC-MS/(MS)) of, als HPLC-MS/(MS) niet mogelijk is, gaschromatografie-massaspectrometrie (GC-MS).