A Dopamine Sensor Based on Pre-Concentration by Magnetic Nanoparticles
Herein, Fe3O4 magnetic nanoparticles (MNPs) were synthesized and characterized. Afterward, a magnetic carbon paste electrode (MCPE) was modified with MNPs via casting and drying MNPs on top of the MCPE (MCPE/MNP). Electrochemical behavior of the MCPE/MNP was studied by cyclic voltammetry in the pres...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | International Journal of Electrochemistry |
| Online Access: | http://dx.doi.org/10.1155/2013/803672 |
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| author | Mojtaba Bagherzadeh Somayeh Ansari Fariborz Riahi Anahita Farahbakhsh |
| author_facet | Mojtaba Bagherzadeh Somayeh Ansari Fariborz Riahi Anahita Farahbakhsh |
| author_sort | Mojtaba Bagherzadeh |
| collection | DOAJ |
| description | Herein, Fe3O4 magnetic nanoparticles (MNPs) were synthesized and characterized. Afterward, a magnetic carbon paste electrode (MCPE) was modified with MNPs via casting and drying MNPs on top of the MCPE (MCPE/MNP). Electrochemical behavior of the MCPE/MNP was studied by cyclic voltammetry in the presence of [Fe(CN)6]3−/4− as a redox probe, and surface pKa of MNPs was evaluated as 6.3±0.1. The behavior of MCPE/MNP towards dopamine (DA) and ascorbic acid (AA) has been investigated by electrochemical methods, and the obtained results showed that the MCPE/MNP has adsorption behavior towards only DA. Based on this behavior, the DA molecules were pre-concentrated on top of the MCPE/MNP and followed with stripping in DA free solution. Subsequent to experimental and instrumental optimization, a calibration curve from 5.0×10-6 to 1.0×10-3 M DA with r2=0.999, DL = 7.6×10-7 M DA, and RSD = 4.6%, was obtained in the presence of 1.0×10-3 M AA. Performance of the MCPE/MNP was successfully tested in a pharmaceutical sample. |
| format | Article |
| id | doaj-art-8915369540f8447a91dc68b8ab24ba87 |
| institution | Kabale University |
| issn | 2090-3529 2090-3537 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Electrochemistry |
| spelling | doaj-art-8915369540f8447a91dc68b8ab24ba872025-02-03T05:51:07ZengWileyInternational Journal of Electrochemistry2090-35292090-35372013-01-01201310.1155/2013/803672803672A Dopamine Sensor Based on Pre-Concentration by Magnetic NanoparticlesMojtaba Bagherzadeh0Somayeh Ansari1Fariborz Riahi2Anahita Farahbakhsh3Material Research School, NSTRI, Isfahan 81465-1589, IranIslamic Azad University, Shahreza Branch, Shahreza 86145-311, IranMaterial Research School, NSTRI, Isfahan 81465-1589, IranIslamic Azad University, Shahreza Branch, Shahreza 86145-311, IranHerein, Fe3O4 magnetic nanoparticles (MNPs) were synthesized and characterized. Afterward, a magnetic carbon paste electrode (MCPE) was modified with MNPs via casting and drying MNPs on top of the MCPE (MCPE/MNP). Electrochemical behavior of the MCPE/MNP was studied by cyclic voltammetry in the presence of [Fe(CN)6]3−/4− as a redox probe, and surface pKa of MNPs was evaluated as 6.3±0.1. The behavior of MCPE/MNP towards dopamine (DA) and ascorbic acid (AA) has been investigated by electrochemical methods, and the obtained results showed that the MCPE/MNP has adsorption behavior towards only DA. Based on this behavior, the DA molecules were pre-concentrated on top of the MCPE/MNP and followed with stripping in DA free solution. Subsequent to experimental and instrumental optimization, a calibration curve from 5.0×10-6 to 1.0×10-3 M DA with r2=0.999, DL = 7.6×10-7 M DA, and RSD = 4.6%, was obtained in the presence of 1.0×10-3 M AA. Performance of the MCPE/MNP was successfully tested in a pharmaceutical sample.http://dx.doi.org/10.1155/2013/803672 |
| spellingShingle | Mojtaba Bagherzadeh Somayeh Ansari Fariborz Riahi Anahita Farahbakhsh A Dopamine Sensor Based on Pre-Concentration by Magnetic Nanoparticles International Journal of Electrochemistry |
| title | A Dopamine Sensor Based on Pre-Concentration by Magnetic Nanoparticles |
| title_full | A Dopamine Sensor Based on Pre-Concentration by Magnetic Nanoparticles |
| title_fullStr | A Dopamine Sensor Based on Pre-Concentration by Magnetic Nanoparticles |
| title_full_unstemmed | A Dopamine Sensor Based on Pre-Concentration by Magnetic Nanoparticles |
| title_short | A Dopamine Sensor Based on Pre-Concentration by Magnetic Nanoparticles |
| title_sort | dopamine sensor based on pre concentration by magnetic nanoparticles |
| url | http://dx.doi.org/10.1155/2013/803672 |
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