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Mass (mass spectrometry) : ウィキペディア英語版
Mass (mass spectrometry)

The mass recorded by a mass spectrometer can refer to different physical quantities depending on the characteristics of the instrument and the manner in which the mass spectrum is displayed.
==Units==
The unified atomic mass unit (symbol: u) is the standard unit that is used for indicating mass on an atomic or molecular scale (atomic mass). The dalton (symbol: Da) is equivalent to the unified atomic mass unit. One unified atomic mass unit is approximately the mass of one a single proton or neutron. The unified atomic mass unit has a value of .〔(Fundamental Physical Constants from NIST )〕 The ''amu'' without the "unified" prefix is an obsolete unit based on oxygen, which was replaced in 1961.


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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