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Electrochemical reactions and ionization processes.

Hubert Girault¹, BaoHong Liu, Liang Qiao

¹Laboratoire d'Electrochimie Physique et Analytique, Ecole Polytechnique Fédérale de Lausanne, Station 6, Lausanne, Switzerland. hubert.girault@epfl.ch

European Journal of Mass Spectrometry (Chichester, England)

|June 10, 2010

Summary

This summary is machine-generated.

Electrochemical reactions play a key role in electrospray and laser desorption ionization. These electrode reactions enable novel tagging and dissociation methods for mass spectrometry.

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Area of Science:

Analytical Chemistry
Physical Chemistry

Background:

Electrospray ionization (ESI) and laser desorption ionization (LDI) are crucial mass spectrometry techniques.
Understanding the fundamental processes at electrode surfaces is vital for optimizing these methods.

Purpose of the Study:

To explore the influence of electrochemical and photo-electrochemical reactions on ESI and LDI.
To demonstrate the application of these reactions for sample tagging and dissociation.

Main Methods:

Investigated redox reactions at the emitter electrode during high-voltage ESI.
Analyzed the photo-electrode behavior of target plates in LDI, particularly with mesoporous semiconductors.

Main Results:

Observed electro-generation of benzoquinone and metal ions at the ESI emitter.
Demonstrated that LDI target plates can function as photo-electrodes.
Showcased the utility of these electrochemical reactions for tagging and dissociation.

Conclusions:

Electrode reactions significantly impact ionization efficiency and analyte modification in ESI and LDI.
Electrochemical and photo-electrochemical approaches offer versatile tools for advanced mass spectrometry applications.