Abstract
In electrochemical sensing, a number of voltammetric or amperometric curves are obtained which are subsequently processed, typically by evaluating peak currents and peak potentials or wave heights and half-wave potentials, frequently after background correction. Transformations of voltammetric data can help to extract specific information, e.g., the number of transferred electrons, and can reveal aspects of the studied electrochemical system, e.g., the contribution of adsorption phenomena. In this communication, we introduce a LabView-based software package, ‘eL-Chem Viewer’, which is for the analysis of voltammetric and amperometric data, and enables their post-acquisition processing using semiderivative, semiintegral, derivative, integral and elimination procedures. The software supports the single-click transfer of peak/wave current and potential data to spreadsheet software, a feature that greatly improves productivity when constructing calibration curves, trumpet plots and performing similar tasks. eL-Chem Viewer is freeware and can be downloaded from www.lchem.cz/elchemviewer.htm.
Highlights
In electrochemical sensing, the analysis of experimental data consists of finding peak or wave heights, positions and other parameters [1]
Semiintegration [10] is a special case of convolution used in voltammetry, the voltammograms are transformed into a wave-shaped response, often denoted a ‘neopolarogram’ [11,12]
The elimination procedure enables the removal of current components which are proportional to the zeroth, square root and first power of the scan rate from the voltammogram
Summary
The analysis of experimental data consists of finding peak or wave heights, positions and other parameters [1]. To cite a few examples, a LabView-based ‘Virtual electroanalytical instrument for square-wave voltammetry’ received widespread attention [4], a wider range of electroanalytical techniques is covered by the Labview operated instrument described in [5] and a ‘Flexible Software Platform for Fast-Scan Cyclic Voltammetry Data Acquisition and Analysis’ was recently published [6]. In this contribution, we took advantage of LabView’s data graphing, signal manipulation and report generation capabilities ito write a software tool ‘eL-Chem Viewer’ for the evaluation and transformation of electrochemical and electroanalytical data.
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