DEVELOPMENT OF MICROCONTROLLER-BASED MULTICHANNEL POTENTIOSTAT FOR ELECTROCHEMICAL ANALYSIS WITH VOLTAMMETRIC AND AMPEROMETRIC METHODS

• Main Author: Maximillan Jonathan, Theodore
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/84271
• Institution: Institut Teknologi Bandung

Research in the field of material characterization using electrochemical methods has been developing rapidly, given its wide range of applications, including material quality analysis and various medical applications. One of the evidence of progress in this field includes the development of potentiostat as a characterization tool with electrochemical methods. A potentiostat provides a specific voltage trigger to a chemical analyte, resulting in different current responses for different analytes. Electrochemical-based material characterization tools have several advantages, including lower costs, faster analysis speed, and simpler working principles compared to other characterization methods. This thesis discusses the development of a multichannel potentiostat based on a microcontroller capable of performing various voltammetry and amperometry measurements, including Cyclic Voltammetry (CV), Differential Pulse Voltammetry (DPV), Linear Sweep Voltammetry (LSV), and Chronoamperometry (CA). By testing the potentiostat using potassium ferricyanide solution (K3[Fe(CN)6]), it shows that the relative accuracy for the CV, DPV, LSV, and CA measurement methods compared to measurements with the commercial potentiostat PalmSens4, which were 95.57%, 90.25%, 88.64%, and 88.65% respectively for the current measurements in the solution. It was also found that the current flowing in the analyte was proportional to its concentration in the test concentration range of 2.5 mM to 20 mM for both channels.