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The establishment of EVISA is funded by the EU through the Fifth Framework Programme (G7RT- CT- 2002- 05112).

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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.


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