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...Chapter page mass spectrometry we can get the molecular of an ideal gas by measuring molar l at k and mpa dividing this value avogadro s number doing average over a possible mixture several isotopes or different chemical components if know composition amount present determination from is simple calculation one most important tools in order to information about abundance technique difficult place methods spectroscopy because it separates ions based on masses speeds static electric magnetic field does not need interaction with electromagnetic except fourier ms be considered as three step procedure creation neutral atoms molecules starting solid body ion separation respect their using fields electronic detection intensity separated mean free path has larger than length instrument avoid collisions therefore done high vacuum ionization techniques deflection system only depend charge ratio e m elementary c but also speed for reason all should have same when they enter focusing systems are ap...