Abstract
This work reported the development, characterization and validation of a portable and affordable potentiostat (PSTAT) for general purpose voltametric analysis. The device was conceived to implement low-cost electronic components such as readily available operational amplifiers, resistors and capacitors, as well as averaging $ 30/unit to produce. Moreover, the system was built to allow a three-electrode system to run linear sweep and cyclic voltammetry, which are widely used tests in the study and investigation of redox processes. Results showcased that device was capable of reliably generating electric potential between the working and reference electrodes, while gathering electric current data from the working electrode surface. Furthermore, inexpensive millimeter-scale pencil graphite electrodes were adequate for use as working electrodes, and behaved in consonance to literature when analyzing potassium ferrocyanide and a phenolic compound; which were herein used as probes. In this sense, the PSTAT herein developed is an affordable tool to widen the access of teaching and research groups worldwide to electrochemical platforms.
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