Measuring system for amperometric chemical sensors using the three-electrode technique for field application
A portable and low cost measuring system for amperometric chemical sensors using the three-electrodetechnique was developed. This technique allows chemical sensors to work with currents higher than tenmicroamperes. The system was based on a potentiostat operation, completed with an I-V converter and...
| Authors: | , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2003 |
| Country: | México |
| Institution: | Universidad Nacional Autónoma de México |
| Repository: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:47410201 |
| Online Access: | https://www.redalyc.org/articulo.oa?id=47410201 |
| Access Level: | Open access |
| Keyword: | Ingeniería ampermeter amperometric unit amperometric sensors Electrochemical sensors |
| Summary: | A portable and low cost measuring system for amperometric chemical sensors using the three-electrodetechnique was developed. This technique allows chemical sensors to work with currents higher than tenmicroamperes. The system was based on a potentiostat operation, completed with an I-V converter andsignal conditioning circuits. The instrument was evaluated comparing calibration curves of hydrogen peroxide,proving several amperometric chemical sensors and biosensors, to those obtained from a very expensivecommercial equipment. Good linearity and sensibility as well as low noise measurements were obtained.Moreover, because the reduced size and low cost, the instrument allows to be used directly in fieldapplications. |
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