Preparation and Electrochemical Characterization of a Carbon Ceramic Electrode Modified with Ferrocenecarboxylic Acid
The present paper describes the characterization of a carbon ceramic electrode modified with ferrocenecarboxylic acid (designated as CCE/Fc) by electrochemical techniques and its detection ability for dopamine. From cyclic voltammetric experiments, it was observed that the CCE/Fc presented a redox p...
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| Format: | Article |
| Language: | English |
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MDPI AG
2011-01-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/11/2/1361/ |
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| author | Christiana A. Pessoa Cristiane R. Zuconelli Sergio T. Fujiwara Tatiane Skeika |
| author_facet | Christiana A. Pessoa Cristiane R. Zuconelli Sergio T. Fujiwara Tatiane Skeika |
| author_sort | Christiana A. Pessoa |
| collection | DOAJ |
| description | The present paper describes the characterization of a carbon ceramic electrode modified with ferrocenecarboxylic acid (designated as CCE/Fc) by electrochemical techniques and its detection ability for dopamine. From cyclic voltammetric experiments, it was observed that the CCE/Fc presented a redox pair at Epa = 405 mV and Epc = 335 mV (DE = 70 mV), related to the ferrocene/ferrocenium process. Studies showed a considerably increase in the redox currents at the same oxidation potential of ferrocene (Epa = 414 mV vs. Ag/AgCl) in the presence of dopamine (DA), differently from those observed when using only the unmodified CCE, in which the anodic peak increase was considerably lower. From SWV experiments, it was observed that the AA (ascorbic acid) oxidation at CCE/Fc occurred in a different potential than the DA oxidation (with a peak separation of approximately 200 mV). Moreover, CCE/Fc did not respond to different AA concentrations, indicating that it is possible to determine DA without the AA interference with this electrode. |
| first_indexed | 2024-04-11T18:22:11Z |
| format | Article |
| id | doaj.art-6a8550be77c14938aa30c930bace9476 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T18:22:11Z |
| publishDate | 2011-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-6a8550be77c14938aa30c930bace94762022-12-22T04:09:45ZengMDPI AGSensors1424-82202011-01-011121361137410.3390/s110201361Preparation and Electrochemical Characterization of a Carbon Ceramic Electrode Modified with Ferrocenecarboxylic AcidChristiana A. PessoaCristiane R. ZuconelliSergio T. FujiwaraTatiane SkeikaThe present paper describes the characterization of a carbon ceramic electrode modified with ferrocenecarboxylic acid (designated as CCE/Fc) by electrochemical techniques and its detection ability for dopamine. From cyclic voltammetric experiments, it was observed that the CCE/Fc presented a redox pair at Epa = 405 mV and Epc = 335 mV (DE = 70 mV), related to the ferrocene/ferrocenium process. Studies showed a considerably increase in the redox currents at the same oxidation potential of ferrocene (Epa = 414 mV vs. Ag/AgCl) in the presence of dopamine (DA), differently from those observed when using only the unmodified CCE, in which the anodic peak increase was considerably lower. From SWV experiments, it was observed that the AA (ascorbic acid) oxidation at CCE/Fc occurred in a different potential than the DA oxidation (with a peak separation of approximately 200 mV). Moreover, CCE/Fc did not respond to different AA concentrations, indicating that it is possible to determine DA without the AA interference with this electrode.http://www.mdpi.com/1424-8220/11/2/1361/carbon ceramic electrodeferrocene carboxylic aciddopamine |
| spellingShingle | Christiana A. Pessoa Cristiane R. Zuconelli Sergio T. Fujiwara Tatiane Skeika Preparation and Electrochemical Characterization of a Carbon Ceramic Electrode Modified with Ferrocenecarboxylic Acid Sensors carbon ceramic electrode ferrocene carboxylic acid dopamine |
| title | Preparation and Electrochemical Characterization of a Carbon Ceramic Electrode Modified with Ferrocenecarboxylic Acid |
| title_full | Preparation and Electrochemical Characterization of a Carbon Ceramic Electrode Modified with Ferrocenecarboxylic Acid |
| title_fullStr | Preparation and Electrochemical Characterization of a Carbon Ceramic Electrode Modified with Ferrocenecarboxylic Acid |
| title_full_unstemmed | Preparation and Electrochemical Characterization of a Carbon Ceramic Electrode Modified with Ferrocenecarboxylic Acid |
| title_short | Preparation and Electrochemical Characterization of a Carbon Ceramic Electrode Modified with Ferrocenecarboxylic Acid |
| title_sort | preparation and electrochemical characterization of a carbon ceramic electrode modified with ferrocenecarboxylic acid |
| topic | carbon ceramic electrode ferrocene carboxylic acid dopamine |
| url | http://www.mdpi.com/1424-8220/11/2/1361/ |
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