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Hydrogen Is the Superior Nebulization Gas for Desorption and Electrospray Ionization
Bincy Binny1, George Joseph1, Andre R Venter1
1Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008-5413, United States.
Analytical Chemistry
|September 22, 2024
Summary
Hydrogen and helium gases improve signal response in electrospray ionization (ESI) and desorption ESI (DESI) mass spectrometry. Hydrogen offers a more economical and sustainable alternative to helium, enhancing chemical imaging resolution.
Area of Science:
- Analytical Chemistry
- Mass Spectrometry
Background:
- Electrospray ionization (ESI) and desorption ESI (DESI) are crucial techniques in mass spectrometry.
- Previous studies indicated improved signal responses using helium and nitrogen as nebulizing/desolvation gases.
Purpose of the Study:
- To investigate the mechanisms behind signal enhancement in ESI and DESI.
- To evaluate a wider range of nebulizing gases beyond helium and nitrogen.
Main Methods:
- Comparative analysis of nebulizing gases including hydrogen (H2), helium (He), nitrogen (N2), argon (Ar), and carbon dioxide (CO2).
- Evaluation of signal response and desorption footprint across different gas types in ESI and DESI.
Main Results:
- Signal enhancements were observed with gases lighter than nitrogen, specifically hydrogen and helium.
- Hydrogen provided improved signal responses compared to helium, offering a more economical and sustainable option.
- Both hydrogen and helium reduced the desorption footprint, leading to potentially higher resolution in chemical imaging microscopy.
Conclusions:
- Lighter nebulizing gases, particularly hydrogen, offer significant advantages in signal enhancement and sustainability for ESI and DESI.
- The reduction in desorption footprint by H2 and He presents opportunities for improved spatial resolution in chemical imaging applications.
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