Laser desorption ionization mass spectrometry: Recent progress in matrix-free and label-assisted techniques
Arundhoti Mandal1, Monisha Singha1, Partha Sarathi Addy2
1Department of Chemistry, Indian Institute of Technology, Kharagpur, India.
Mass Spectrometry Reviews
|October 14, 2017
Summary
Matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) now detects low molecular weight analytes. New strategies, including laser-absorbing label-assisted LDI-MS (LALDI-MS), overcome matrix interference for broader applications.
Area of Science:
- Analytical Chemistry
- Spectrometry
Background:
- Matrix-assisted laser desorption/ionization (MALDI) mass spectrometry is a key technique for analyzing macromolecules.
- Traditional MALDI struggles with low molecular weight analytes due to matrix-related interference.
- Detecting small organic molecules and metal ion complexes requires advanced methods.
Purpose of the Study:
- To review advancements in MALDI-based mass spectrometry for low molecular weight analyte detection.
- To highlight strategies overcoming matrix interference in mass spectrometry.
- To emphasize the development and application of laser-absorbing label-assisted LDI-MS (LALDI-MS).
Main Methods:
- Exploration of alternative matrix materials.
- Utilization of matrix-free surface materials.
- Employing metabolites for direct laser absorption.
- Development of laser-absorbing label-assisted LDI-MS (LALDI-MS).
Main Results:
- Successful detection of low molecular weight analytes previously challenging for MALDI-MS.
- Demonstration of effective strategies to mitigate matrix-related signal suppression.
- Advancement in LALDI-MS as a powerful tool for specific analyte detection.
- Broadened applicability of mass spectrometry to diverse chemical species.
Conclusions:
- MALDI-based mass spectrometry has evolved to effectively analyze low molecular weight compounds.
- The reviewed strategies offer robust solutions for matrix interference issues.
- LALDI-MS represents a significant development for sensitive and specific analysis in mass spectrometry.
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