Reversed-phase and weak anion-exchange mixed-mode stationary phase for fast separation of medium-, long- and very long chain free fatty acids by ultra-high-performance liquid chromatography-high resolution mass spectrometry - Mattarozzi, M; Riboni, N; Maffini, M; Scarpella, S; Bianchi, F; Careri, M (J Chromatogr A, 2021)