ion cyclotron resonance mass spectrometry Fourier transform ion cyclotron resonance mass spectrometry Mass spectrometry where the mass-to-charge ratio of the sample ions is determined by measuring their cyclotron frequency (the frequency at which they precesses in a fixed magnetic field) and subjecting it to a Fourier transform. CHMO:0000502 in-beam Fourier-transform ion cyclotron resonance FTICRMS Fourier transform mass spectrometry Fourier transform mass spectroscopy FT-ICR-MS FT/ICR mass spectrometry FT-ICR mass spectroscopy ICR-FT-MS FT-ICRMS FTMS FT-ICR MS FT ICR MS FT/ICR mass spectroscopy FT-ICR mass spectrometry ion cyclotron resonance Fourier transform mass spectrometry Fourier transform ion cyclotron resonance mass spectroscopy Fourier transform mass spectrometry