Difference between revisions of "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.
 
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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== Gold Book entry ==
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http://goldbook.iupac.org/M03730.html
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'''mass resolving power'''
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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.
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'''Source''':
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PAC, 1978, 50, 65 ([[Recommendations for symbolism and nomenclature for mass spectroscopy]]) on page 72
 
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Revision as of 02:56, 17 July 2009