Gas chromatography–negative ion chemical ionisation mass spectrometry using o-(pentafluorobenzyloxycarbonyl)-2,3,4,5-tetrafluorobenzoyl derivatives for the quantitative determination of methylphenidate in human plasma
Keywords: GC, gas chromatography; MS, mass spectrometry; NICI, negative ion chemical ionization; PBB, o-(pentafluorobenzyloxycarbonyl)-benzoyl; PBTFB, o-(pentafluorobenzyloxycarbonyl)-2,3,4,5-tetrafluorobenzoyl; MPH, methylphenidate; IS, internal standard; ADHD, at