Accurate mass: Difference between revisions
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'''accurate mass''' | |||
Experimentally determined mass of an [[ion]] of known charge. | |||
:Note 1: Can be used to determine elemental composition. | |||
:Note 2: Accurate mass and [[exact mass]] are not synonymous. Accurate mass refers to a measured mass and exact mass refers to a calculated mass. | |||
Related terms: [[average mass]], [[exact mass]], [[monoisotopic mass]], [[nominal mass]]. | |||
O. D. Sparkman. [[Mass Spec Desk Reference]]. Global View Publishing, Pittsburgh (2006). | |||
A. W. T. Bristow, K. S. Webb. J. Am. Soc. Mass Spectrom. 14, 1086-1098 (2003). | |||
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=Other versions= | |||
{{Def2| | {{Def2| | ||
An experimentally determined mass of an [[ion]] that is used to determine an elemental formula. For ions containing combinations of the elements C, H, N, O, P, S, and the halogens, with mass less than 200 [[u]], a measurement with 5 ppm uncertainty is sufficient to uniquely determine the elemental composition. | An experimentally determined mass of an [[ion]] that is used to determine an elemental formula. For ions containing combinations of the elements C, H, N, O, P, S, and the halogens, with mass less than 200 [[u]], a measurement with 5 ppm uncertainty is sufficient to uniquely determine the elemental composition. | ||
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