Linear Sweep Voltammetry (LSV)

Introduction

Linear Sweep Voltammetry (LSV) is one of the voltammetric techniques with wide applications in electrochemistry and analytical chemistry. In the LSV method, the electric current resulting from applying a potential to an electrode is measured, which allows obtaining information about the analyte of interest.

This method is characterized by its high sensitivity, as it can measure the concentration of the analyte in a specific solution. The potential difference between a reference electrode and the working electrode (WE) — which is considered the sample electrode — is measured over time. The oxidation or reduction of the analyte is obtained in the form of a peak or through the received current signal.

Linear sweep voltammetry (LSV) analysis is conducted in the Photon laboratory with high precision on powdered samples, solutions, and components.

Linear Sweep Voltammetry Analysis

Linear Sweep Voltammetry (LSV) is one of the types of voltammetric analysis and is considered a very common electrochemical technique. In this technique, the electric current resulting from applying a potential to an electrode is measured, allowing information about the desired analyte to be obtained.

This method is characterized by high sensitivity, as it can measure the concentration of the analyte in a specific solution. In this process, the potential difference is measured between a reference electrode and the working electrode (WE), which is considered the sample electrode, over time. The working electrode is often in a solid state. The sample is dissolved in an electrolyte solution.

Voltammetry can be linear or cyclic. The scan rate and the change in potential are adjusted. In the linear model (LSV), the potential starts from a specific value and increases to a final point. In the cyclic model (CV), the direction of the potential is reversed after reaching the final potential, which reduces the potential back to the starting point. The oxidation or reduction process of the analyte is extracted in the form of a peak or through the received current signal. The figure below shows an example.