Resolving power (in mass spectrometry): Difference between revisions
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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. | 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. | ||
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http://goldbook.iupac.org/M03730.html | http://goldbook.iupac.org/M03730.html | ||
Revision as of 13:22, 18 July 2009
Obsolete Template
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) |
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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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http://goldbook.iupac.org/M03730.html mass resolving power 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 (Δm50%)
- Full width of mass spectral peak at half-maximum peak height
- Mass resolving power (m/Δm50%)
- 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
