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Updated: May 22, 2025

Whole-body Mass Spectrometry Imaging by Infrared Matrix-assisted Laser Desorption Electrospray Ionization IR-MALDESI
Published on: March 24, 2016
An Ultra-High-Resolution Mass Spectrometer with an Intermediate-Pressure Matrix-Assisted Laser Desorption/Ionization
Zhengge Chen1, Yi Hong1,2, Futao Lin1
1College of Environment and Climate, Institute of Mass Spectrometry and Atmospheric Environment, Jinan University, Guangzhou 510632, China.
A new mass spectrometer integrates matrix-assisted laser desorption/ionization (MALDI) with an electrostatic ion trap, achieving ultrahigh resolution for detailed molecular analysis. This high-performance instrument demonstrates potential for distinguishing complex samples like edible oils.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Instrumentation
Background:
- High-resolution, high-throughput, and spatially resolved mass analysis are critical demands in mass spectrometry.
- Existing mass spectrometers face limitations in achieving ultrahigh resolution and broad mass ranges simultaneously.
Purpose of the Study:
- To develop a novel high-performance mass spectrometer for ultrahigh-resolution mass analysis.
- To integrate a matrix-assisted laser desorption/ionization (MALDI) source with a planar electrostatic ion trap mass analyzer.
Main Methods:
- Integration of a matrix-assisted laser desorption/ionization (MALDI) source with a novel planar electrostatic ion trap mass analyzer.
- Performance characterization using specific standards and analysis of edible oils.
- Utilizing high-order harmonics for enhanced resolution.
Main Results:
- Achieved resolution exceeding 530 K at 392 Th with a transient time of 800 ms.
- Successfully distinguished isotopic peaks in the Met-Arg-Phe-Ala acetate salt (MRFA) M+2 peak family.
- Demonstrated a mass range from 133 to 9500 Th and a low detection limit of 32 fg.
- Distinguished plant and animal oils based on triacylglycerol profiles in preliminary tests.
Conclusions:
- The developed mass spectrometer offers ultrahigh resolution and a broad mass range for advanced analytical applications.
- The instrument shows promise for detailed molecular analysis and distinguishing complex biological and chemical samples.
- This novel integration advances the capabilities of mass spectrometry for high-throughput and high-resolution analysis.
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