Resolving power (in mass spectrometry)

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Orange Book entry

Orange Book

ORANGE BOOK DEFINITION IUPAC. Analytical Division. Compendium of Analytical Nomenclature (the Orange Book). Definitive Rules, 1979 (see also Orange Book 2023)
Resolving power (in mass spectrometry)
The ability to distinguish between ions differing in the quotient mass/charge by a small increment. It may be characterized by giving the peak width, measured in mass units, expressed as a function of mass, for at least two points on the peak, specifically for 50% and for 5% of the maximum peak height.
IUPAC 1997 Orange Book Chapter 12
Index of Orange Book Terms

See also

• Resolution (mass spectrometry)

External links

• Reference:Marshall 2002 gives the following definitions:

Mass peak width (Δm_50%)

Full width of mass spectral peak at half-maximum peak height

Mass resolving power (m/Δm_50%)

A well-isolated single mass spectral peak

Mass resolution (m₂ ?????????????????????????? m₁ in Da, or (m₂ ?????????????????????????? m₁)/m₁ in ppm)

The smallest mass difference between equal magnitude peaks such that the valley between them is a specified fraction of either peak height

Mass precision

Root-mean-square deviation in a large number of repeated measurements

Mass accuracy

Difference between measured and actual mass

Mass defect

Difference between exact and nominal mass

• JEOL Resolution Tutorial