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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
29/09/2021 |
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Data da última atualização: |
10/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BLUM, S. A.; ZAHREBELNEI, F.; NAGATA, N.; ZUCOLOTTO, V.; MATTOSO, L. H. C.; PESSOA, C. A.; GARCIA, J. R.; WOHNRATH, K. |
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Afiliação: |
LUIZ HENRIQUE CAPPARELLI MATTOSO, CNPDIA. |
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Título: |
Experimental design to enhance dopamine electrochemical detection using carbon paste electrodes. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Brazilian Journal of Analytical Chemistry, v. 8, n. 32, 2021. |
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Páginas: |
178?197 |
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ISSN: |
2179-3425 |
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DOI: |
10.30744/brjac.2179-3425.AR-31-2021 |
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Idioma: |
Inglês |
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Conteúdo: |
Efforts have been made on the development of new modified electrodes to be used in the fast determination of neurotransmitters, either in commercial drugs or in biological samples. Determination of dopamine (DA), for example, is of great importance since the lack of this neurotransmitter is related to many neurological disorders, including Parkinson’s and Alzheimer’s diseases. In this paper, we present a detailed electrochemical characterization, as well as DA detection studies of paste electrodes incorporating carbon materials in different allotropic forms, including carbon black modified with intrinsically conducting polymers (Eeonomers®), pristine carbon black, graphite, and carbon nanotubes. Emphasis is put on the smaller particle size and larger specific surface area of CB Eeonomers® materials, which led to an improved electroanalytical performance for the developed devices. The electrodes fabricated with Eeonomers® modified with polyaniline exhibited the highest current response towards DA detection, in addition to the ability of distinguishing DA from its natural interferent, ascorbic acid. Furthermore, a central composite design was used to investigate the influence of pH and electrode composition (proportion of Eeonomers®) on the electrochemical sensing of DA. A greater sensitivity was achieved for 50:50 (w/w) KP20/KPy20 electrode at pH 7.0. The optimized devices showed to be promising tools to perform quick, cheap and sensitive detection of this neurotransmitter in bioanalytical systems MenosEfforts have been made on the development of new modified electrodes to be used in the fast determination of neurotransmitters, either in commercial drugs or in biological samples. Determination of dopamine (DA), for example, is of great importance since the lack of this neurotransmitter is related to many neurological disorders, including Parkinson’s and Alzheimer’s diseases. In this paper, we present a detailed electrochemical characterization, as well as DA detection studies of paste electrodes incorporating carbon materials in different allotropic forms, including carbon black modified with intrinsically conducting polymers (Eeonomers®), pristine carbon black, graphite, and carbon nanotubes. Emphasis is put on the smaller particle size and larger specific surface area of CB Eeonomers® materials, which led to an improved electroanalytical performance for the developed devices. The electrodes fabricated with Eeonomers® modified with polyaniline exhibited the highest current response towards DA detection, in addition to the ability of distinguishing DA from its natural interferent, ascorbic acid. Furthermore, a central composite design was used to investigate the influence of pH and electrode composition (proportion of Eeonomers®) on the electrochemical sensing of DA. A greater sensitivity was achieved for 50:50 (w/w) KP20/KPy20 electrode at pH 7.0. The optimized devices showed to be promising tools to perform quick, cheap and sensitive detection of this neurotransmitter in... Mostrar Tudo |
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Palavras-Chave: |
Carbon black; Carbon paste electrode; Intrinsically conducting polymers; Response surface. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02401naa a2200289 a 4500
001 2134844
005 2022-06-10
008 2021 bl uuuu u00u1 u #d
022 $a2179-3425
024 7 $a10.30744/brjac.2179-3425.AR-31-2021$2DOI
100 1 $aBLUM, S. A.
245 $aExperimental design to enhance dopamine electrochemical detection using carbon paste electrodes.$h[electronic resource]
260 $c2021
300 $a178?197
520 $aEfforts have been made on the development of new modified electrodes to be used in the fast determination of neurotransmitters, either in commercial drugs or in biological samples. Determination of dopamine (DA), for example, is of great importance since the lack of this neurotransmitter is related to many neurological disorders, including Parkinson’s and Alzheimer’s diseases. In this paper, we present a detailed electrochemical characterization, as well as DA detection studies of paste electrodes incorporating carbon materials in different allotropic forms, including carbon black modified with intrinsically conducting polymers (Eeonomers®), pristine carbon black, graphite, and carbon nanotubes. Emphasis is put on the smaller particle size and larger specific surface area of CB Eeonomers® materials, which led to an improved electroanalytical performance for the developed devices. The electrodes fabricated with Eeonomers® modified with polyaniline exhibited the highest current response towards DA detection, in addition to the ability of distinguishing DA from its natural interferent, ascorbic acid. Furthermore, a central composite design was used to investigate the influence of pH and electrode composition (proportion of Eeonomers®) on the electrochemical sensing of DA. A greater sensitivity was achieved for 50:50 (w/w) KP20/KPy20 electrode at pH 7.0. The optimized devices showed to be promising tools to perform quick, cheap and sensitive detection of this neurotransmitter in bioanalytical systems
653 $aCarbon black
653 $aCarbon paste electrode
653 $aIntrinsically conducting polymers
653 $aResponse surface
700 1 $aZAHREBELNEI, F.
700 1 $aNAGATA, N.
700 1 $aZUCOLOTTO, V.
700 1 $aMATTOSO, L. H. C.
700 1 $aPESSOA, C. A.
700 1 $aGARCIA, J. R.
700 1 $aWOHNRATH, K.
773 $tBrazilian Journal of Analytical Chemistry$gv. 8, n. 32, 2021.
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Embrapa Instrumentação (CNPDIA) |
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| Registros recuperados : 26 | |
| 5. |  | ASSIS, D. S.; TOSTO, S. G.; MANZATTO, C. V. Vegetation cover and land use in the microcatchments in the outskirts Pau-Brasil Germoplasm Bank, Discovery Coast, Bahia, Brazil. In: INTERNATIONAL CONFERENCE ON LAND DEGRADATION 3., AND MEETING OF THE IUSS SUBCOMISSION C - SOIL AND WATER CONSERVATION, 2001, Rio de Janeiro. Conference guide, program and book of abstracts... Rio de Janeiro: Embrapa; IUSS; IAC; SBCS, 2001. p.111| Biblioteca(s): Embrapa Solos. |
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| 10. | | ASSIS, D. S.; TOSTO, S. G.; MADUREIRA, C. B.; LONTRO, S. M.; BLANCANEAUX, P. Land use planification and territorial agency regarding to soil use - São Gabriel do Oeste - MS, Brazil. In: WORLD CONGRESS OF SOIL SCIENCE, 16., 1998, Montpellier. Proceedings [...]. Montpellier: ORSTOM, 1998. Título em francês: Planification et mise en ordre territorial pour l’utilisation du sol - São Gabriel do Oeste - MS, Brésil. Scientific registration n.: 2528. Symposium n.: 35. Presentation: poster.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Solos. |
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| 11. | | ASSIS, D. S.; GOMES, J. B. V.; TOSTO, S. G.; SILVA, T. C. da. Macrozoneamento ambiental do Município de São Gabriel do Oeste. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 27., 1999, Brasília, DF. Resumos [...]. Planaltina, DF: Embrapa Cerrados, 1999. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Solos. |
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| 16. | | SANTOS, I. A. dos; ASSIS, D. S.; KATO, O. R.; BRIENZA JUNIOR, S.; SILVA, R. R.; VILELA, E. F. Alternative system to slash-and-burn for agriculture in the eastern Amazon region: Impacts on ant species richness. In: ESA ANNUAL MEETING, 59., 2011, Reno. Entomology 2011. Lanham: Entomological Society of America, 2011.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 19. | | ASSIS, D. S.; TOSTO, S. G.; MACEDO, J. R. de; COSTA, J. R. S.; MADUREIRA, C. B. Estudo da qualidade ambiental de municipios em funcao do uso do solo-referencial para o planejamento e ordenacao territorial. In: CONGRESSO BRASILEIRO DE CIENCIA DO SOLO, 26., 1997, Rio de Janeiro, RJ. Resumos... Rio de Janeiro: Sociedade Brasileira de Ciencia do Solo, 1997. p.336.| Biblioteca(s): Embrapa Solos. |
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| 20. | | ASSIS, D. S.; TOSTO, S. G.; STRAUCH, J. C. M.; SANTOS, R. D. dos; SIMÕES, S. C. Levantamento da cobertura vegetal e uso das terras como subsídio à conservação do solo e da água, nas bacias hidrográficas do entorno da Reserva Ecológica Pau-Brasil - Bahia. In: REUNIÃO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA, 13., 2000, Ilhéus. 500 anos de uso do solo no Brasil. Ilhéus: CEPLAC, 2000. 1 CD-ROM.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Solos. |
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| Registros recuperados : 26 | |
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