Tandem Mass Spectrometry

Tandem mass spectrometry involves multiple steps of mass selection or analysis, usually separated by some form of fragmentation. A tandem mass spectrometer is one capable of multiple rounds of mass spectrometry. For example, one mass analyzer can isolate one peptide from many entering a mass spectrometer. A second mass analyzer then stabilizes the peptide ions while they collide with a gas, causing them to fragment by collision-induced dissociation (CID). A third mass analyzer then catalogues the fragments produced from the peptides. Tandem MS can also be done in a single mass analyzer over time as in a quadrupole ion trap. There are various methods for fragmenting molecules for tandem MS, including collision-induced dissociation (CID), electron capture dissociation (ECD), infrared multiphoton dissociation (IRMPD) and blackbody infrared radiative dissociation (BIRD).

  • Selected reaction monitoring
  • Collision-induced dissociation
  • Electron-transfer dissociation
  • Infrared multiphoton dissociation
  • Electron capture dissociation
  • Blackbody infrared radiative dissociation
  • Electron-detachment dissociation
  • Surface-induced dissociation
  • Accelerator mass spectrometry

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