Perspective on electrospray ionization and its relation to electrochemistry.

Area of Science:

• Electrochemistry
• Fluid Dynamics
• Analytical Chemistry

Background:

• Electrospraying is a widely used technique for generating fine liquid droplets.
• Understanding the electrochemical processes within the electrospray capillary is crucial for optimizing performance.
• Existing models often lack the quantitative detail needed for precise parameter control.

Purpose of the Study:

• To present a novel electrochemical perspective on electrospraying.
• To develop a new mathematical model for electrospray capillaries.
• To provide a quantitative basis for understanding and improving electrospray systems.

Main Methods:

• Detailed discussion of current and liquid flow dynamics within the capillary.
• Experimental mapping of potentials and currents using an inserted probe electrode.
• Derivation of a "nonlinear resistor electrospray capillary model" based on experimental data.

Main Results:

• The new model analytically relates current and potential maps to liquid conductivity and current density.
• Experimental data validated the model's predictions.
• The model simplifies obtaining quantitative information from analytical electrospray systems.

Conclusions:

• The nonlinear resistor electrospray capillary model offers a new quantitative framework for electrospray analysis.
• This model enhances the understanding of electrochemical transformations in electrospray emitters.
• The model's simplicity and ease of use facilitate practical applications and further research.