| Mass
Spectroscopy Units |
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| In Mass
Spectroscopy (MS), atomic and |
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| molecular weights
are generally expessed in |
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| terms of atomic
mass units (amu). |
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| The atomic mass
unit is based on upon a |
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| relative scale in
which the reference is the |
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| carbon isotope 126C, which is
assigned a |
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| mass
of exactly 12 amu. Thus the amu is |
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| rdefined as 1/12
of the mass of one neutral |
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| carbon
atom. Mass spectrometrists also call |
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| the amu the Dalton (Da). |
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