Mass Spectrometer


Mass Spectrometry of Bromine, Br2

  • Bromine has 2 isotopes 79Br and 81Br in an approximately 1:1 ratio
  • specificlly 50.5:49.5
  • Thus, the bromine molecule may be composed of two 79Br atoms (mass 158 amu)
  • a more probable combination of 79Br-81Br (mass 160 amu)
  • two 81Br atoms (mass 162 amu)
  • Fragmentation of Br2 to a bromine cation then gives rise to equal sized ion peaks at 79 and 81 amu.
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