Curve-Fitting to resolve overlapping voltammetric peaks: Model and examples

TL;DR

This paper introduces a versatile curve-fitting model for resolving overlapping voltammetric peaks across various techniques and electrochemical systems, enhancing analysis accuracy in complex signals.

Contribution

The paper presents a novel, broadly applicable model for peak resolution in voltammetry, capable of handling overlapping signals regardless of electrode process reversibility.

Findings

Effective resolution of overlapping peaks demonstrated across multiple voltammetric techniques.

Model performs well for reversible, quasireversible, and irreversible systems.

Enhanced analysis accuracy in complex voltammetric signals.

Abstract

A model is presented that is applicable to a wide range of peak-shaped voltammetric signals. It may be used, via curve-fitting, to resolve severely overlapped peaks, irrespective of the degree(s) of reversibility of the electrode processes. The resolution procedure has been thoroughly tested for several voltammetric and polarographic techniques (differential pulse, square wave and pseudo-derivative normal pulse), using reversible, quasireversible and irreversible electrochemical systems.