The establishment of EVISA is funded by the EU through
the Fifth Framework Programme (G7RT- CT- 2002- 05112).
Supporters of EVISA includes:
monoisotopic ion mass
The monoisotopic ion mass is defined as the mass of an ion for a given empirical formula calculated using the exact mass of the most abundant isotope of each element; for example, C = 12.000000 Da (exactly), H = 1.007825 Da, O = 15.994915 Da.