Definitions for "Mass-to-charge ratio"
The mass-to-charge ratio, denoted m/e, is the unit used by mass spectrometers to separate ions. It is simply a ratio of the mass to the size of the electronic charge for any given molecular ion or fragment. Since the charge is usually +1, the mass and the mass-to-charge ratio are often the same.
Denotes the dimensionless quantity formed by dividing the mass of an ion by its charge.
the quantity measured in mass spectrometry. Units are usually Daltons (Da) or atomic mass units.