FAB Inlet

FAB Inlet

What is a Fast Atom Bombardment Gun?

The FAB Gun is a direct insertion probe that uses Fast Atom Bombardment to ionize the sample. It consists of a long rod with a sample stage and xenon gas source (gun) for ionization.

The FAB technique is a process which:

  • Generates high energy ions and atoms.
  • Focuses those ions and atoms through the gun onto a liquid surface.
  • Induces secondary ions from the liquid surface.

FAB Advantages

  • excellent technique for analysis of peptides
  • good for nonvolatile compounds.

FAB Disadvantages

  • static introduction of samples requires pure sample
  • slow process which gives low sample throughput
  • high noise background
  • contaminates ion source quickly

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