inductively coupled plasma mass spectrometry inductively coupled plasma field sector mass spectrometry CHMO:0000547 ICP-SF-MS Mass spectrometry where the sample is ionised in a plasma (a partially ionised gas–-such as Ar–-containing free electrons) which has been generated by electromagnetic induction. The beam of ions is then directed into magnetic field, the orientation of which is perpendicular to the beam. The magnetic field forces the charged particles into different circular trajectories, the radii of which depend on the strength of the magnetic field, the accelerating voltage, and the mass of the ion. inductively coupled plasma field sector mass spectroscopy