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.
 
== [[ASMS Terms and Definitions Poster]] Entry ==
 
 
Resolution of the Confusion on Peak Separation
 
 
Mass resolving power and mass resolution have been used interchangeably throughout the literature, so the confusion surrounding their exact meaning is understandable.  In his forthcoming book, "Guide to Mass Spectrometry," Ken Busch advocates definitions that are consistent these proposed terminologies for mass resolution and mass resolving power.  In most disciplines, resolution is understood to be the smallest observable change in a quantity, whereas resolving power, i.e. the ability to distinguish two closely spaced quantities, is inversely proportional to resolution.
 
Proposed definitions:
 
mass resolution
 
 
 
See Usage Note for mass resolving power and theoretical mass resolving power
 
mass resolving power
 
 
 
 
See Usage Note for theoretical mass resolving power
 
 
 
  
 
== External Links ==
 
== External Links ==
  
 
[[Reference:Marshall 2002]] gives the following definitions:
 
[[Reference:Marshall 2002]] gives the following definitions:
 
  
 
:'''Mass peak width (&#916;m<sub>50%</sub>)'''
 
:'''Mass peak width (&#916;m<sub>50%</sub>)'''

Revision as of 21:45, 14 January 2005