api5000The API 5000™ LCMSMS System is 's most sensitive triple quadrupole mass spectrometer for small molecule analysis. Hhest sensitivity triple quadrupole mass spectrometer for small molecule analysis. Lowest limits ofIn 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