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Updated: Jul 14, 2026
09:38
Dithranol as a Matrix for Matrix Assisted Laser Desorption/Ionization Imaging on a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer
Published on: November 26, 2013
Development of a high-performance MALDI-TOF mass spectrometer utilizing a spiral ion trajectory
Takaya Satoh1, Takafumi Sato, Jun Tamura
1JEOL Ltd., Tokyo, Japan. taksatoh@jeol.co.jp
Summary
A new matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF) mass spectrometer uses a spiral ion path to achieve high mass resolving power and accuracy. This novel design enhances performance for peptide and protein analysis.
Area of Science:
- Analytical Chemistry
- Mass Spectrometry
- Instrumentation
Background:
- Traditional mass spectrometers face limitations in mass resolving power and accuracy.
- Improving ion optics is crucial for enhancing mass spectrometry performance.
Purpose of the Study:
- To develop a novel MALDI-TOF mass spectrometer with a spiral ion trajectory.
- To enhance mass resolving power and mass accuracy compared to existing systems.
Main Methods:
- Development of a mass spectrometer with four toroidal electrostatic sectors and a figure-eight orbit.
- Implementation of a multi-cycle spiral ion trajectory with a total flight path of 17 m.
- Testing performance with standard peptides and bovine serum albumin tryptic digest.
Main Results:
- Achieved a mass resolving power of 80,000 (FWHM) at m/z = 2564.
- Realized mass accuracy below 2 ppm over a wide m/z range (500-3000).
- Demonstrated reduced mass dependence on resolving power due to extended flight path.
Conclusions:
- The novel spiral ion trajectory MALDI-TOF mass spectrometer significantly improves mass resolving power and accuracy.
- This instrument offers enhanced capabilities for analyzing peptides and proteins.
- The design overcomes limitations of conventional reflectron systems.
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