EM Lists possible compositions of exact masses in mass-spectrometry.
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EM Description

EM (Short from Exact Mass) is a freeware utility that accepts an exact mass as determined by Mass Spectrometry and lists possible compositions of the atoms S, O, N, C and H. Context-sensitive help is given on the statusbar. As a matter of fact, this application will prove to be self-explanatory for MS experts. Calculations are based on the following exact masses of atoms: ￭ H = 1.0078 ￭ S = 31.9721 ￭ O = 15.9949 ￭ N = 14.0031 ￭ C = 12.0000

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