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Related Experiment Videos

MALDI matrices for biomolecular analysis based on functionalized carbon nanomaterials.

Michael V Ugarov1, T Egan, Dmitry V Khabashesku

  • 1Ionwerks, Inc., 2472 Bolsover, Suite 255, Houston, Texas 77005, USA.

Analytical Chemistry
|November 13, 2004
PubMed
Summary

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Derivatized fullerenes and single-wall nanotubes serve as efficient matrices for matrix-assisted laser desorption/ionization (MALDI) mass spectrometry. These novel matrices offer advantages in ionization efficiency and broader optical absorption, overcoming limitations with advanced mass spectrometry techniques.

Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Biophysics

Background:

  • Conventional matrices in matrix-assisted laser desorption/ionization (MALDI) mass spectrometry have limitations.
  • Derivatized fullerenes and single-wall nanotubes present potential as alternative MALDI matrices.
  • Efficient ionization and broad optical absorption are desirable properties for MALDI matrices.

Purpose of the Study:

  • To evaluate derivatized fullerenes and single-wall nanotubes as matrices for MALDI mass spectrometry.
  • To explore the advantages of these novel matrices over conventional ones.
  • To address challenges associated with fullerene-based MALDI, such as ion interference.

Main Methods:

  • Utilizing derivatized fullerenes and single-wall nanotubes as matrices for MALDI.

Related Experiment Videos

  • Employing dried droplet preparation and aerosolization techniques for sample deposition.
  • Applying MALDI-ion mobility time-of-flight (IM-oTOF) mass spectrometry for ion separation.
  • Analyzing bioanalytes and rat brain tissue samples.

    • Main Results:

    • Derivatized fullerenes and single-wall nanotubes demonstrated efficient matrix performance at low molar ratios.
    • Protonated or cationized molecular ions were successfully generated.
    • MALDI-ion mobility time-of-flight (IM-oTOF) mass spectrometry effectively resolved isobaric interference.
    • Fullerene matrices were successfully applied to analyze rat brain tissue.

    Conclusions:

    • Derivatized fullerenes and single-wall nanotubes are effective matrices for MALDI mass spectrometry, offering high ionization efficiency and broad optical absorption.
    • The use of MALDI-ion mobility time-of-flight (IM-oTOF) mass spectrometry overcomes the challenge of isobaric interference.
    • These fullerene-based matrices show promise for analyzing complex biological samples, including tissue.