1949 - Ion Cyclotron Resonance (ICR)

This represents the beginning of ultra high resolution mass spectrometry offered by FTMS.

• Hipple J.A., Sommer H., Thomas H.A.
  A Precise Method of Determining the Faraday by Magnetic Resonance
  Phys. Rev., 1949, 76(12), p.1877

  
  
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• Gal J.F.
  A historical note on an unrecognized early stage of the development of fast scanning ion cyclotron resonance spectrometers: the resotron
  International J. of Mass Spec. and Ion Processes, 1996, 157/158(), p.1

  
  
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