4.1.4. LC–ESI–MS/MS Conditions
The phenolic compound contents (mainly phenolic acids) in the juçara juice were also determined by liquid chromatography-electrospray ionization–tandem mass spectrometry (LC–ESI–MS/MS) on a 1200 HPLC system (Agilent Technologies, Waldbronn, Germany) coupled to a hybrid quadrupole linear ion trap mass spectrometer QTRAP