Exact mass: Difference between revisions

Latest revision as of 12:59, 31 August 2017

Exact mass
IUPAC RECOMMENDATIONS 2013
exact mass Calculated mass of an ion or molecule with specified isotopic composition. See also accurate mass.
Related Term(s):
Reference(s): S. Kim, R. P. Rodgers, A. G. Marshall. Int. J. Mass Spectrom. 251, 260 (2006).
From Definitions of Terms Relating to Mass Spectrometry (IUPAC Recommendations 2013); DOI: 10.1351/PAC-REC-06-04-06 © IUPAC 2013.
Index of Recommended Terms

Mallet and Down ISBN 0470027614: "The mass of a molecule or ion calculated using the integral masses of the most abundant isotopes of each element present"

Sparkman ISBN 0966081390: "The integer mass of the most abundant naturally occurring stable isotope of an element ... the nominal mass of an element is equal to the mass number of the most abundant stable isotope of an element"

de Hoffmann ISBN 0470033118: "The nominal mass is calculated using the mass of the predominant isotope of each element rounded to the nearest integer value that corresponds to the mass number ..."

Watson and Sparkman ISBN 0470516348: "The nominal mass of an element is the integer mass of its most abundant stable isotope ... the nominal mass of a molecule, radical, or ion is the sum of the nominal masses of all the atoms of its constituent elements." (common organic elements this is the lowest but not always)

Gross ISBN 3642423469: "the nominal mass of an element is defined as the integer mass of its most abundant naturally occurring stable isotope ... the nominal mass of an ion is the sum of the nominal masses of its constituent elements."

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-{{DefName|The calculated mass of an ion or molecule containing a single isotope of each atom. }}
+{{Final
+|acronym=
+|def=exact mass
+Calculated mass of an [[ion]] or molecule with specified isotopic composition.
-{{Rev5|
+See also [[accurate mass]].
-Calculated mass of an ion or molecule containing a single specified isotope of each atom obtained from the masses of these isotopes using a specified degree of accuracy and precision.
+|rel=
+|ref=S. Kim, R. P. Rodgers, A. G. Marshall. Int. J. Mass Spectrom. 251, 260 (2006).
-Related terms: [[accurate mass]], [[average mass]], [[monoisotopic mass]], [[nominal mass]].
-|
-#S. Kim, R. P. Rodgers, A. G. Marshall. Int. J. Mass Spectrom. 251, 260-265 (2006).
 }}
+{{nm}}
-{{incorrect|
-Page 61:  suggests using ''measured accurate mass''
-}}
-{{ProblemTerm}}
 == See also ==
 *[[Accurate Mass]]
 *[[Average Mass]]
 *[[Atomic Mass Unit]]
 *[[Nominal Mass]]
 [[Category:Mass]]
 {{DEFAULTSORT:Exact Mass}}