api5000AB Sciex API 5000 Triple Quad LCMS. The AB Sciex API 5000 Triple Quad LCMS is a cutting-edge mass spectrometer desned for laboratories that demand superior sensitivityIn the API 5000™ system, we use the same proven principle of collisional focusing in the hh pressure region directly behind the orifice. The QJet ion guide desn allows the free jet to