Design and analysis of a low-cost potentiostat for application with microbial electrochemical sensors
Article
Hill, Andrew, Tait, Stephan, Harris, Peter, Baillie, Craig, Virdis, Bernardino and McCabe, Bernadette K.. 2023. "Design and analysis of a low-cost potentiostat for application with microbial electrochemical sensors." Electrochimica Acta. 468. https://doi.org/10.1016/j.electacta.2023.143201
| Article Title | Design and analysis of a low-cost potentiostat for application with microbial electrochemical sensors |
|---|---|
| ERA Journal ID | 1629 |
| Article Category | Article |
| Authors | Hill, Andrew, Tait, Stephan, Harris, Peter, Baillie, Craig, Virdis, Bernardino and McCabe, Bernadette K. |
| Journal Title | Electrochimica Acta |
| Journal Citation | 468 |
| Article Number | 143201 |
| Number of Pages | 10 |
| Year | 2023 |
| Publisher | Elsevier |
| Place of Publication | United Kingdom |
| ISSN | 0013-4686 |
| 1873-3859 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.electacta.2023.143201 |
| Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0013468623013737 |
| Abstract | Potentiostats are often limited to relatively costly laboratory-based analysis, which limits their access and application by researchers and practitioners, including for mobile in-field systems. This paper presents an alternative low-cost potentiostat design, sufficiently accurate for application with a microbial electrochemical sensor. The design of the device is described, evaluated using simulation and applied to a microbial electrochemical sensor to measure acetate. Incorporated into the design are a micro-controller, local data storage, and a standard industrial communication protocol to provide flexibility and data management. The device was able to produce a potential at ±2.5 V relative to an Ag-AgCl reference electrode and to measure current at ±2 mA, which was comparable to the performance of laboratory potentiostats on the market. Simulation analysis using fundamental electronic principles, such as Ohm's Law, confirmed that operation of the system was valid and as expected. Further testing using a pseudo-cell showed the device was accurate across a relevant potential range. Results from the initial calibration of the device show less than 1.6 % standard error of the mean. The device was further applied to a microbial electrochemical cell to measure acetate, which confirmed the device was functional for this application and recorded values were consistent with expectations based on the relevant literature. |
| Keywords | Acetate; Electronic circuit ; Sensing; Anaerobic digestion ; Volatile fatty acids |
| ANZSRC Field of Research 2020 | 300199. Agricultural biotechnology not elsewhere classified |
| Byline Affiliations | Centre for Agricultural Engineering |
| University of Queensland |
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https://research.usq.edu.au/item/z25z1/design-and-analysis-of-a-low-cost-potentiostat-for-application-with-microbial-electrochemical-sensors
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