Phase relationships in two-dimensional mass spectrometry

Maria A. van Agthoven, David P. A. Kilgour, Alice M. Lynch, Mark P. Barrow, Tomos E. Morgan, Christopher A. Wootton, Lionel Chiron, Marc-André Delsuc, Peter B. O’Connor

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9 Citations (Scopus)


Two-dimensional mass spectrometry (2D MS) is a data-independent tandem mass spectrometry technique in which precursor and fragment ion species can be correlated without the need for prior ion isolation. The behavior of phase in 2D Fourier transform mass spectrometry is investigated with respect to the calculation of phase-corrected absorption-mode 2D mass spectra. 2D MS datasets have a phase that is defined differently in each dimension. In both dimensions, the phase behavior of precursor and fragment ions is found to be different. The dependence of the phase for both precursor and fragment ion signals on various parameters (e.g., modulation frequency, shape of the fragmentation zone) is discussed. Experimental data confirms the theoretical calculations of the phase in each dimension. Understanding the phase relationships in a 2D mass spectrum is beneficial to the development of possible algorithms for phase correction, which may improve both the signal-to-noise ratio and the resolving power of peaks in 2D mass spectra.
Original languageEnglish
Number of pages14
JournalJournal of the American Society for Mass Spectrometry
VolumeFirst Online
Early online date15 Oct 2019
Publication statusE-pub ahead of print - 15 Oct 2019


  • Fourier transform
  • Mass spectrometry
  • Two-dimensional mass spectrometry
  • Phase correction
  • Data processing


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