A tandem quadrupole-ion trap mass spectrometer

摘要: Abstract A new tandem mass spectrometer has been constructed by interfacing a Paul ion trap to quadrupole filter. Ions generated in an EI—CI source are mass-selected using the and injected 50–100 ms pulses into at injection energies which range from nominally zero 150 eV. Helium gas pressure of 1 mTorr is used dampen motion thus ions. Stored ions, as well their dissociation ion/molecule reaction products, detected mass-selective instability scan mode trap. perfluorotributylamine, polycyclic aromatic hydrocarbons, xenon tungsten hexacarbonyl all show efficient trapping ranging 10 110 As energy raised, internal deposited projectile increases, demonstrated displaying fragment abundances versus form breakdown curves. Pyrene other PAH ions undergo extensive fragmentation ⩾ 100 eV give spectra resemble those recorded surface-induced (SID). These data suggest that with sufficient kinetic collide surface during injection. Gas phase reactions also occur lead formation [M + 17]+ molecular abundant dinuclear hexacarbonyl. The instrument evaluated compared spectrometers.