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Imaging mass spectrometry.

Liam A McDonnell1, Ron M A Heeren

  • 1FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands.

Mass Spectrometry Reviews
|May 2, 2007
PubMed
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Imaging mass spectrometry provides detailed chemical maps of biological samples. Advances in secondary ion mass spectrometry (SIMS) and matrix-assisted laser desorption/ionization (MALDI) imaging are driving new discoveries in molecular localization.

Area of Science:

  • Analytical Chemistry
  • Biophysics
  • Microscopy

Background:

  • Imaging mass spectrometry integrates mass spectrometry with microscopy for chemical analysis.
  • It enables simultaneous imaging of diverse analytes, correlating chemical composition with physical sample structures.
  • Key parameters influencing data quality include ionization sensitivity, sample preparation, spatial resolution, and speed.

Purpose of the Study:

  • To review instrumental and methodological advancements in imaging mass spectrometry.
  • To compare and contrast secondary ion mass spectrometry (SIMS) and matrix-assisted laser desorption/ionization (MALDI) imaging techniques.
  • To discuss future directions and potential applications of imaging mass spectrometry.

Main Methods:

  • Focus on advancements in secondary ion mass spectrometry (SIMS) and matrix-assisted laser desorption/ionization (MALDI) for biological imaging.

Related Experiment Videos

  • Discussion of instrumental developments and methodological approaches.
  • Comparative analysis of SIMS and MALDI imaging capabilities.

    • Main Results:

    • Significant progress in ionization, sample preparation, spatial resolution, and speed for SIMS and MALDI.
    • Demonstrated applications include protein localization in tumors, phospholipid changes, and sub-cellular biomolecule distribution.
    • Growing interest in imaging mass spectrometry due to these advancements.

    Conclusions:

    • Imaging mass spectrometry offers powerful capabilities for probing sample chemical organization.
    • Recent developments in SIMS and MALDI have significantly enhanced its utility for biological studies.
    • Future potential lies in further instrumental refinement and expanded applications across various scientific disciplines.