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Electron Impact Ionization Advantages / Disadvantages


Advantages:
  • EI is the most widely used ionization mode.
  • Spectrum are easily analyzed since ions formed are the molecular ion or fragments of the molecule.
Disadvantages:
  • The ionization process transfers relatively large amounts of energy to the molecule and may result in extensive fragmentation.
  • The sample must be in the gas phase to ionize, therefore heating of the sample may be required.