Methods and apparatus for analysis of mixtures by mass spectrometry
US4126781A
Method and apparatus for producing electrostatic fields by surface currents on resistive materials with applications to charged particle optics and energy analysis
US4105916A
Methods and apparatus for simultaneously producing and electronically separating the chemical ionization mass spectrum and the electron impact ionization mass spectrum of the same sample material
US4146787A
Methods and apparatus for energy analysis and energy filtering of secondary ions and electrons
US4137453A
Methods and apparatus for improving electron capture detectors by collection of ions
US4093855A
Detector for heavy ions following mass analysis
GB1515406A
Quadrupole mass filters
CA1046169A
Method and apparatus for spatial separation of ac and dc electric fields, with application to fringe fields in quadrupole mass filters
US3936634A
Method and apparatus for improved focusing of ion currents in quadrupole mass filter
US3937954A
Methods and apparatus for spatial separation of AC and DC electric fields, with application to fringe fields in quadrupole mass filters
US3867632A
Methods and apparatus for spatial separation of AC and DC electrical fields with application to fringe fields in quadrupole mass filters
