The establishment of EVISA is funded by the EU through
the Fifth Framework Programme (G7RT- CT- 2002- 05112).
Supporters of EVISA includes:
resolution of a mass spectrometer
The resolution of a mass spectrometer is defined in several different ways relative to the commonly given formula of
m/Δm, where m is the mass of the ion at which resolution is specified. For two
adjacent, symmetric peaks of equal height in a mass spectrum, the instrumental
(physical or electrical) parameters are adjusted such that the peaks at masses
m and (m -Δm) are separated by a valley that, at its lowest point, is just 10%
of the height of either peak. Then, the resolution (10% valley definition) is m/Δm.
The definition can be given also for 50% valley or 5% valley separations. For a
single peak, the resolution is still calculated as m/Δm, but now Δm is the
width of the peak at a height that is a specified fraction of the maximum peak height.
A 5% peak width definition is technically equivalent to the 10% valley
definition of resolution. A common standard is the definition of resolution
based on Δm being the full width of the peak at half its maximum height (FWHM).