Next-Generation Infrared Matrix-Assisted Laser Desorption Electrospray Ionization Source for Mass Spectrometry...

Area of Science:

• Analytical Chemistry
• Mass Spectrometry
• Spectroscopy

Background:

• Infrared matrix-assisted laser desorption electrospray ionization (IR-MALDESI) is a hybrid ambient ionization technique.
• Existing IR-MALDESI sources have limitations hindering broader application in high-throughput screening (HTS) and mass spectrometry imaging (MSI).

Purpose of the Study:

• To design and characterize a next-generation (NextGen) IR-MALDESI source with an improved architecture.
• To enhance user-friendliness, versatility, and compatibility with Orbitrap mass spectrometers.
• To optimize component geometries for increased ion abundance and facilitate replication.

Main Methods:

• Development of a novel NextGen IR-MALDESI source architecture.
• Integration of a vertically mounted IR-laser, planar translation stage with height control, and aluminum enclosure.
• Optimization of component geometries and mass spectrometer interface plate.
• Provision of documentation for replicability.

Main Results:

• The NextGen IR-MALDESI source demonstrates improved user-friendliness and versatility.
• Enhanced performance for MSI and direct analysis applications.
• Optimized geometries led to increased target ion abundances across a wide m/z range.
• Successful coupling with multiple Orbitrap mass spectrometers.

Conclusions:

• The NextGen IR-MALDESI source represents a significant advancement in ambient ionization technology.
• This improved platform expands capabilities for MSI and direct analysis in diverse research settings.
• The design's replicability promotes wider adoption and accessibility in analytical laboratories.