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 Mass Resolution The mass resolution is the dimensionless ratio M/DM. Low mass resolution refers to M/DM= 300, enough to separate ions that differ by at least one amu. Sometimes, however, High Mass Resolution is needed to separate ions that have the same nominal mass, like 30Si+H (30.981597 amu) and 31P (30.973763 amu) for instance. At Probion, we run magnetic sector Ion Mass Spectrometers. These allow M/DM values as high as 10 000. (Almost) all common interferences can be solved easily : The mass resolution is the dimensionless ratio M/DM
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