total ion current
  1. (after mass analysis): The sum of the separate ion currents carried by the different ions contributing to the spectrum (this is sometimes called the reconstructed ion current).
  2. (before mass analysis): The sum of all the separate ion currents for ions of the same sign before mass analysis.
Orange Book,2nd ed., p. 206
PAC, 1991, 63, 1541. 'Recommendations for nomenclature and symbolism for mass spectroscopy (including an appendix of terms used in vacuum technology). (Recommendations 1991)' on page 1554 (