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

Radio frequency ion guide

Real time Faraday spectrometer

Real-time control of ion detection with extended dynamic range

Reducing interferences, in plasma source mass spectrometers

Remote reagent ion generator

Resolving RF mass spectrometer

Resonance ionization for analytical spectroscopy

RF-only mass spectrometer with auxiliary excitation

Saliva assay technique for heavy metal

Sample preparation method

Second ion mass spectrometry method and imaging method

Separation of chemical species

Simplex optimization methods for instrumentation tuning