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Related Experiment Videos

Three-dimensional ion mobility/TOFMS analysis of electrosprayed biomolecules

C S Hoaglund1, S J Valentine, C R Sporleder

  • 1Department of Chemistry, Indiana University, Bloomington 47405, USA.

Analytical Chemistry
|June 13, 1998
PubMed
Summary

A new instrument combines ion mobility and mass spectrometry to simultaneously measure ion mobility distributions and mass for multiple ions. This technique provides detailed three-dimensional data on collision cross section, mass-to-charge ratio, and ion abundance.

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Area of Science:

  • Analytical Chemistry
  • Biophysics

Background:

  • Ion mobility spectrometry (IMS) separates ions based on size and shape.
  • Mass spectrometry (MS) separates ions based on mass-to-charge ratio.
  • Simultaneous measurement of both properties offers richer molecular characterization.

Purpose of the Study:

  • To develop a novel instrument coupling ion mobility and mass spectrometry.
  • To enable simultaneous recording of mass-resolved ion mobility distributions.
  • To provide a three-dimensional dataset including collision cross section, mass-to-charge, and ion abundance.

Main Methods:

  • Coupling an electrospray ion source to an injected-ion drift tube/time-of-flight mass spectrometer.
  • Separating ions by mobility in a drift tube and by mass-to-charge in a time-of-flight mass spectrometer.

Related Experiment Videos

  • Acquiring data to generate a three-dimensional spectrum.

    • Main Results:

    • Demonstrated simultaneous mass-resolved ion mobility measurements for multiple ions.
    • Achieved separation based on both mobility and mass-to-charge.
    • Presented 3D spectral data for bradykinin and ubiquitin ions.

    Conclusions:

    • The developed instrument enables simultaneous acquisition of mass-resolved ion mobility distributions.
    • This technique provides comprehensive characterization of ion mixtures.
    • The method is applicable to complex biological molecules like peptides and proteins.