Difference between revisions of "Resolving power (in mass spectrometry)"
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::A well-isolated single mass spectral peak | ::A well-isolated single mass spectral peak | ||
− | :'''Mass resolution (m<sub>2</sub> | + | :'''Mass resolution (m<sub>2</sub> m<sub>1</sub> in Da, or (m<sub>2</sub> m<sub>1</sub>)/m<sub>1</sub> in ppm)''' |
::The smallest mass difference between equal magnitude peaks such that the valley between them is a specified fraction of either peak height | ::The smallest mass difference between equal magnitude peaks such that the valley between them is a specified fraction of either peak height | ||
Revision as of 00:15, 8 October 2012
Obsolete Template
Orange Book
ORANGE BOOK DEFINITION
IUPAC. Analytical Division. Compendium of Analytical Nomenclature (the Orange Book). Definitive Rules, 1979. |
Resolving power (in mass spectrometry) |
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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 |
Gold Book
GOLD BOOK DEFINITION
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the Gold Book). Compiled by A. D. McNaught and A.Wilkinson. Blackwell Scientific Publications, Oxford (1997). |
Resolving power (in mass spectrometry) |
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Resolving power (mass spectrometry) http://goldbook.iupac.org/R05321.html 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 at fifty percent and at five percent of the maximum peak height. mass resolving power http://goldbook.iupac.org/M03730.html Commonly and also acceptably defined in terms of the overlap (or 'valley') between two peaks. Thus for two peaks of equal height, masses and , when there is overlap between the two peaks to a stated percentage of either peak height (10% is recommended), then the resolving power is defined as . The percentage overlap (or 'valley') concerned must always be stated. Source: PAC, 1978, 50, 65 (Recommendations for symbolism and nomenclature for mass spectroscopy) on page 72 |
IUPAC Gold Book |
Index of Gold Book Terms |
See also
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 (m_{2} m_{1} in Da, or (m_{2} m_{1})/m_{1} 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