Multiple Pulse Amperometry—An Antifouling Approach for Nitrite Determination Using Carbon Fiber Microelectrodes
Nitrite is a ubiquitous pollutant in modern society. Developing new strategies for its determination is very important, and electroanalytical methods present outstanding performance on this task. However, the use of bare electrodes is not recommended because of their predisposition to poisoning and...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/1/387 |
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| author | Douglas P. M. Saraiva Daniel V. Braga Bruna Bossard Mauro Bertotti |
| author_facet | Douglas P. M. Saraiva Daniel V. Braga Bruna Bossard Mauro Bertotti |
| author_sort | Douglas P. M. Saraiva |
| collection | DOAJ |
| description | Nitrite is a ubiquitous pollutant in modern society. Developing new strategies for its determination is very important, and electroanalytical methods present outstanding performance on this task. However, the use of bare electrodes is not recommended because of their predisposition to poisoning and passivation. We herein report a procedure to overcome these limitations on carbon fiber microelectrodes through pulsed amperometry. A three-pulse amperometry approach was used to reduce the current decay from 47% (after 20 min under constant potential) to virtually 0%. Repeatability and reproducibility were found to have an RSD lower than 0.5% and 7%, respectively. Tap water and synthetic inorganic saliva samples were fortified with nitrite, and the results obtained with the proposed sensor were in good agreement with the amount added. |
| first_indexed | 2024-03-09T03:29:51Z |
| format | Article |
| id | doaj.art-b9458209535b4109ae10d3263dff6992 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T03:29:51Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-b9458209535b4109ae10d3263dff69922023-12-03T14:57:50ZengMDPI AGMolecules1420-30492023-01-0128138710.3390/molecules28010387Multiple Pulse Amperometry—An Antifouling Approach for Nitrite Determination Using Carbon Fiber MicroelectrodesDouglas P. M. Saraiva0Daniel V. Braga1Bruna Bossard2Mauro Bertotti3Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo 05513-970, SP, BrazilDepartment of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo 05513-970, SP, BrazilDepartment of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo 05513-970, SP, BrazilDepartment of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo 05513-970, SP, BrazilNitrite is a ubiquitous pollutant in modern society. Developing new strategies for its determination is very important, and electroanalytical methods present outstanding performance on this task. However, the use of bare electrodes is not recommended because of their predisposition to poisoning and passivation. We herein report a procedure to overcome these limitations on carbon fiber microelectrodes through pulsed amperometry. A three-pulse amperometry approach was used to reduce the current decay from 47% (after 20 min under constant potential) to virtually 0%. Repeatability and reproducibility were found to have an RSD lower than 0.5% and 7%, respectively. Tap water and synthetic inorganic saliva samples were fortified with nitrite, and the results obtained with the proposed sensor were in good agreement with the amount added.https://www.mdpi.com/1420-3049/28/1/387nitritepulsed amperometryelectroanalysisantifouling |
| spellingShingle | Douglas P. M. Saraiva Daniel V. Braga Bruna Bossard Mauro Bertotti Multiple Pulse Amperometry—An Antifouling Approach for Nitrite Determination Using Carbon Fiber Microelectrodes Molecules nitrite pulsed amperometry electroanalysis antifouling |
| title | Multiple Pulse Amperometry—An Antifouling Approach for Nitrite Determination Using Carbon Fiber Microelectrodes |
| title_full | Multiple Pulse Amperometry—An Antifouling Approach for Nitrite Determination Using Carbon Fiber Microelectrodes |
| title_fullStr | Multiple Pulse Amperometry—An Antifouling Approach for Nitrite Determination Using Carbon Fiber Microelectrodes |
| title_full_unstemmed | Multiple Pulse Amperometry—An Antifouling Approach for Nitrite Determination Using Carbon Fiber Microelectrodes |
| title_short | Multiple Pulse Amperometry—An Antifouling Approach for Nitrite Determination Using Carbon Fiber Microelectrodes |
| title_sort | multiple pulse amperometry an antifouling approach for nitrite determination using carbon fiber microelectrodes |
| topic | nitrite pulsed amperometry electroanalysis antifouling |
| url | https://www.mdpi.com/1420-3049/28/1/387 |
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