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| 105. |  | DUTRA, A. de S.; FURTADO, A. A. L.; PACHECO, S.; OIANO NETO, J. Efeito do tratamento térmico na concentração de carotenóides, compostos fenólicos, ácido ascórbico e capacidade antioxidante do suco de tangerina murcote. Brazilian Journal of Food Technology, Campinas, v. 15, n. 3, p. 198-207, jul./set. 2012.| Biblioteca(s): Embrapa Agroindústria de Alimentos. |
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| 107. | | FELBERG, I.; CABRAL, C.; FURTADO, A. A. L.; PONTES, S. M. Elaboração de uma bebida mista de "leite" de soja hidrossolúvel e castanha-do-brasil (Bertholletia Excelsea, H.B.K.). In: CONGRESSO BRASILEIRO DE SOJA, 2.,; MERCOSOJA 2002, Foz do Iguaçú, PR. Perspectivas do agronegócio da soja: resumos. Londrina: Embrapa Soja, 2002. p. 346.| Biblioteca(s): Embrapa Agroindústria de Alimentos. |
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| 108. | | FELBERG, I.; CABRAL, L. C.; FURTADO, A. A. L.; PONTES, S. M. Elaboração de uma bebida mista de "leite" de soja integral e castanha-do-brasil (Bertholletia excelsea, H.B.K.). In: CONGRESSO BRASILEIRO DE SOJA, 2., e MERCOSOJA 2002, Foz do Iguaçú, PR. Perspectivas do agronegócio da soja: resumos. Londrina: Embrapa Soja, 2002. p. 351.| Biblioteca(s): Embrapa Agroindústria de Alimentos. |
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| 112. | | FURTADO, A. L. dos S.; LEAL, J. J. F.; ESTEVES, F. de A.; BOZELLI, R. L. Efeito da matéria orgânica (liter e séston) na metanogênese de um lago amazônico impactado por efluentes da lavagem da bauxita. In: CONGRESSO BRASILEIRO DE LIMNOLOGIA, 12., 2009, Gramado, RS. Anais... Gramado, RS: SBL, 2009. 1 p. Painel| Biblioteca(s): Embrapa Territorial. |
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| 113. | | DUTRA, A. S.; FURTADO, A. A. L.; SILVA, J. P. L. Efeito da pasteurização térmica na qualidade microbiológica do suco de tangerina (Citrus sp.) var. Murcott. Higiene Alimentar, São Paulo, v. 23, n. 170/171, p. 308-309, mar./abr. 2009. Edição dos Trabalhos apresentados no IV Congresso Latinoamericano e X Congresso Brasileiro de Higienistas Alimentos, III Encontro Nacional de Centros de Controle de Zoonoses, II Encontro do Sistema Brasileiro de Inspeção de Produtos de...| Biblioteca(s): Embrapa Agroindústria de Alimentos. |
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| 115. | | FERRAZ, R. B.; RODRIGUES, C. A. G.; TOSTO, S. G.; FURTADO, A. L. dos S. Espacialização da soja nos biomas Amazônia, Cerrado, Mata Atlântica e Pampa entre os anos de 2007 e 2012. In: CONGRESSO INTERINSTITUCIONAL DE INICIAÇÃO CIENTÍFICA, 8., 2014, Campinas. Anais... Campinas: IAC, 2014. 8 p.| Biblioteca(s): Embrapa Territorial. |
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| 116. | | DUTRA, A. S.; FURTADO, A. A. L.; OIANO-NETO, J.; ROSA, J. S. Effect of heat treatment on the concentration of sugars present in murcott tangerine juice. In: INTERNATIONAL HORTICULTURAL CONGRESS, 28., 2010, Lisboa. Science and horticulture for people: abstracts. [S.l.]: ISHS, 2010. v. 2, p. 131, S02.283.| Biblioteca(s): Embrapa Agroindústria de Alimentos. |
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| 118. | | COELHO, M. A. Z.; ROSA, M. F.; FURTADO, A. A. L.; LEITE, S. G. F. Fermentacao semi solida da casca de coco verde para producao de enzimas: influencia da razao substrato/solucao de sais. In: CONGRESSO BRASILEIRO DE CIENCIA E TECNOLOGIA DE ALIMENTOS, 17., 2000, Fortaleza, CE. Livro de resumos... Fortaleza: SBCTA, 2000. v.3 , p.9.62, 2000.| Biblioteca(s): Embrapa Agroindústria de Alimentos. |
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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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