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Registro Completo |
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
29/09/2021 |
Data da última atualização: |
10/06/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
BLUM, S. A.; ZAHREBELNEI, F.; NAGATA, N.; ZUCOLOTTO, V.; MATTOSO, L. H. C.; PESSOA, C. A.; GARCIA, J. R.; WOHNRATH, K. |
Afiliação: |
LUIZ HENRIQUE CAPPARELLI MATTOSO, CNPDIA. |
Título: |
Experimental design to enhance dopamine electrochemical detection using carbon paste electrodes. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Brazilian Journal of Analytical Chemistry, v. 8, n. 32, 2021. |
Páginas: |
178?197 |
ISSN: |
2179-3425 |
DOI: |
10.30744/brjac.2179-3425.AR-31-2021 |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Carbon black; Carbon paste electrode; Intrinsically conducting polymers; Response surface. |
Categoria do assunto: |
-- |
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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Biblioteca(s): |
Embrapa Pesca e Aquicultura. |
Data corrente: |
22/08/2012 |
Data da última atualização: |
22/08/2012 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
SIQUEIRA, L. V.; BERGAMIN, G. T.; VEIVERBERG, C. A.; FLORES, D. P.; RADÜNZ NETO, J. |
Afiliação: |
LUCIANA VALENTIM SIQUEIRA, UNIVERSIDADE FEDERAL DE SANTA MARIA; GIOVANI TAFFAREL BERGAMIN, CNPASA; CÁTIA ALINE VEIVERBERG, INSTITUTO FEDERAL FARROUPILHA; DANIEL PROIS FLORES, UNIVERSIDADE FEDERAL DE SANTA MARIA; JOÃO RADÜNZ NETO, UNIVERSIDADE FEDERAL DE SANTA MARIA. |
Título: |
Desempenho de jundiás alimentados com fontes proteicas submetidas ou não a tratamento para remoção de antinutrientes. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
In: CONGRESSO DA SOCIEDADE BRASILEIRA DE AQUICULTURA E BIOLOGIA AQUÁTICA, 5., 2012, Palmas. Unir, consolidar e avançar: anais. Palmas: AQUABIO, 2012. |
Descrição Física: |
1 CD-ROM. |
Idioma: |
Português |
Notas: |
Organizado por: Sílvio Ricardo Maurano; AQUACIÊNCIA 2012. |
Conteúdo: |
O objetivo deste trabalho foi avaliar o desempenho de jundiás alimentados com diferentes fontes proteicas de origem vegetal, submetidas ou não a tratamento químico (lavagem com solução ácida, seguida de lavagem com etanol) para a remoção de fatores antinutricionais. |
Palavras-Chave: |
Farelo de canola; Farelo de girassol; Farelo de soja. |
Thesagro: |
Bagre; Nutrição animal; Peixe; Rhamdia quelen. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/64699/1/R0175-1.pdf
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Marc: |
LEADER 01189nam a2200265 a 4500 001 1931912 005 2012-08-22 008 2012 bl uuuu u00u1 u #d 100 1 $aSIQUEIRA, L. V. 245 $aDesempenho de jundiás alimentados com fontes proteicas submetidas ou não a tratamento para remoção de antinutrientes. 260 $aIn: CONGRESSO DA SOCIEDADE BRASILEIRA DE AQUICULTURA E BIOLOGIA AQUÁTICA, 5., 2012, Palmas. Unir, consolidar e avançar: anais. Palmas: AQUABIO$c2012 300 $c1 CD-ROM. 500 $aOrganizado por: Sílvio Ricardo Maurano; AQUACIÊNCIA 2012. 520 $aO objetivo deste trabalho foi avaliar o desempenho de jundiás alimentados com diferentes fontes proteicas de origem vegetal, submetidas ou não a tratamento químico (lavagem com solução ácida, seguida de lavagem com etanol) para a remoção de fatores antinutricionais. 650 $aBagre 650 $aNutrição animal 650 $aPeixe 650 $aRhamdia quelen 653 $aFarelo de canola 653 $aFarelo de girassol 653 $aFarelo de soja 700 1 $aBERGAMIN, G. T. 700 1 $aVEIVERBERG, C. A. 700 1 $aFLORES, D. P. 700 1 $aRADÜNZ NETO, J.
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