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Mass Spectrometry Facility

EB-38, Department of Chemistry,
University of Alberta,
Edmonton, AB
Canada T6G 2G2

  1. Mass Calculators:
    1. On-Line Exact Mass Calculator - Type in the formula and it will calculate the exact mass.
    2. Alternatively, you may wish to download software to use at your desktop, try the Molecular Weight Calculator for windows.
    3. If you prefer to calculate masses manually then use the Table of Atomic Masses current as of 1995.  When calculating exact mass keep in mind that some instruments account for the mass of the electron (observe charged species by mass spectrometry) and some do not.  This table of ION masses may be helpful when considering exact mass measurements for electrospray ions.
  2. Protein / Peptide Utilities:
    1. On-Line - Protein Prospector at UCSF - besides database searching there are many helpful utilities here including theoretical digests, theoretical peptide fragmentation, possible amino acid compositions for a given mass, etc.

For further information, please contact:

©1999 University of Alberta
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