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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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lock mass

Over a period of time, the m/z calibration of some mass analysers can drift. This can be corrected by introducing and detecting an ion of known m/z value and correcting the electrical parameters of
the analyser to keep this ion in focus. In common use with magnetic sector and TOF analysers
especially when accurate mass measurement is being obtained.

The term "lock mass" was found in the following pages:


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