J J Thomson 1912 parabola spectrograph for isotopes; Aston 1922 Nobel; modern Orbitrap (Makarov 2000) + TOF + Q-TOF + MALDI; ppm-level accurate mass.
J J Thomson 1912 parabola spectrograph for isotopes; Aston 1922 Nobel; modern Orbitrap (Makarov 2000) + TOF + Q-TOF + MALDI; ppm-level accurate mass.