Comparison of collision-induced dissociation and electron-induced dissociation of phillyrin using FT-ICR MS

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• The ESI FT-ICR MS using CID and ECD methods was applied to investigate the characteristic fragment ions of Phillyrin for the first time.
• The fragmentation process of phillyrin which formation of the peroxide bond by CID, was discussed in detail.
• These characteristic fragmentation pathways were helpful to analyze and interpret the stability and property of the parent ion.
• It was clearly demonstrated that ECD can be not only used to Biological field but also a powerful complement to the structure identification of small molecules.

Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry using collision-induced dissociation (CID) and electron capture dissociation (ECD) at high mass resolution was first applied to investigate the characteristic fragment ions of phillyrin. The CID experimental results demonstrated the elemental composition of fragment ions unambiguously, so a reasonable fragmentation pathway of phillyrin was proposed. The ECD fragmentation mechanism was believed to be fundamentally different from the CID method. ECD could be used not only in the biological field but also as a powerful complement to the structural identification of small molecular compounds. The characteristic fragmentation pathways were helpful in analyzing and interpreting the stability and property of the parent ion.

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