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| 2. |  | ALCÂNTARA, V. S. B.; MIRANDA, H. S. F.; TEIXEIRA, P. R. M.; MALLOZZI, P.; COELHO, S. M. B. M. Behaviour of some potato cultivars in the presence of the root-koot Nematóide Meloidogyne javanica. Summa Phytopathologica, Piracicaba, v. 7, n. 1-2, p. 26-27, jan./abr. 1981.| Biblioteca(s): Embrapa Hortaliças. |
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| 4. | | PIRES, E. J. P.; POMMER, C. V.; TERRA, M. M.; SILVA, A. C. P. da; PASSOS, I. R. da S.; MARTINS, F. P.; COELHO, S. M. B. M.; RIBEIRO, I. J. A.; PEREIRA, F. M. Cultivares IAC de Uvas de Mesa Apirenas sobre Dois Porta-Enxertos. Pesquisa Agropecuaria Brasileira, Brasilia, v.27, n.3, p.449-453, mar.1992| Biblioteca(s): Embrapa Unidades Centrais. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
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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Circulação/Nível: |
B - 1 |
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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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