Quadruple ion trap method having improved sensitivity
Quadrupole ion trap device and methods of operating a...
Quadrupole ion trap mass spectrometer having two axial modulatio
Quadrupole mass filter with unbalanced R.F. voltage
Quadrupole mass spectrometer with ION traps to enhance...
Quadrupole mobility spectrometer
Quadrupole trap improved technique for ion isolation
Quadrupole trap ion isolation method
Quadrupole with axial DC field
Quantitative analyzing method by a secondary ion mass spectromet