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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agroindústria de Alimentos. Para informações adicionais entre em contato com ctaa.biblioteca@embrapa.br. |
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Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
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Data corrente: |
31/12/2024 |
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Data da última atualização: |
28/01/2025 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SOUZA, P. G. DE; SANTOS, A. C. C. dos; ORLANDO, E.; TRINDADE, M. E. F.; PALLONE, J.; AYRES, E. M. M.; ROSENTHAL, A.; TEODORO, A. J. |
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Afiliação: |
PÂMELA GOMES DE SOUZA, UNIVERSIDADE FEDERAL DO ESTADO DO RIO DE JANEIRO; AUGUSTO CÉSAR COSTA DOS SANTOS, UNIVERSIDADE ESTADUAL DE CAMPINAS; EDUARDO ORLANDO, UNIVERSIDADE ESTADUAL DE CAMPINAS; MARIA EDUARDA FLORES TRINDADE, UNIVERSIDADE FEDERAL DO ESTADO DO RIO DE JANEIRO; JULIANA PALLONE, UNIVERSIDADE ESTADUAL DE CAMPINAS; ELLEN M MENEZES AYRES, UNIVERSIDADE FEDERAL DO ESTADO DO RIO DE JANEIRO; AMAURI ROSENTHAL, CTAA; ANDERSON JUNGER TEODORO, UNIVERSIDADE FEDERAL FLUMINENSE. |
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Título: |
Comparison between methods of extraction and analysis of oxalic acid by flame atomic absorption spectrometry and uv-vis spectrophotometer in purslane leaves (Portulaca Oleracea L.). |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
In: SIMPóSIO LATINO AMERICANO DE CIÊNCIA DE ALIMENTOS E NUTRIÇÃO, 15., 2023, Campinas. Anais eletrônicos..., Galoá, 2024. |
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Idioma: |
Inglês |
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Notas: |
SLACAN. Pôster 166099. |
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Conteúdo: |
Oxalic acid is an antinutrient that can complex with minerals such as calcium, reducing the bioaccessibility of this essential element, in addition to increasing the risk of generating oxalate crystals in the kidneys. Purslane (Portulaca oleracea L.), a Non-conventional edible plants (NCEP), has a high content of oxalic acid. Thus, this study aimed to compare two methods of extraction and analysis for the determination of oxalic acid in lyophilized purslane leaves. For extraction, two methods were used: the first, described by Adeneyi et al., (2009), where 6M HCl was used with heating for 1 hour (M1); and the second, described by Naiki et al., (2014), where 0.25N HCl was used, with heating for 15 min (M2). For both methods, an oxalate precipitation step was performed. The analyzes using the UV-vis spectrophotometer were performed using the KMnO4 oxidation method by oxalic acid, described by Naiki et al., (2014). For analysis by FAAS, the calcium concentration obtained was converted to that of oxalic acid, according to the formula described in the AOAC (1990), with adaptations. The results were expressed on a dry basis. In the spectrophotometer analyses, the leaves presented 27.5 ± 0.96 g/100g for M1 and 12.2 ± 1.1 g/100g for M2, showing a significant difference (p<0.05) between the results. In the FAAS analyses, the leaves presented 5.8 ± 0.5 g/100g for M1 and 6.1 g/100g for M2, with no significant difference (p<0.05) between the results. The very high levels found for the extraction using 6M HCl for 1 hour may have favored the extraction and precipitation of compounds that were not of interest, causing reactional interferences during the permanganate oxidation step. Extraction with more dilute acid contributes to Green Chemistry and FAAS analysis proved to be adequate for the determination of this antinutrient in purslane. MenosOxalic acid is an antinutrient that can complex with minerals such as calcium, reducing the bioaccessibility of this essential element, in addition to increasing the risk of generating oxalate crystals in the kidneys. Purslane (Portulaca oleracea L.), a Non-conventional edible plants (NCEP), has a high content of oxalic acid. Thus, this study aimed to compare two methods of extraction and analysis for the determination of oxalic acid in lyophilized purslane leaves. For extraction, two methods were used: the first, described by Adeneyi et al., (2009), where 6M HCl was used with heating for 1 hour (M1); and the second, described by Naiki et al., (2014), where 0.25N HCl was used, with heating for 15 min (M2). For both methods, an oxalate precipitation step was performed. The analyzes using the UV-vis spectrophotometer were performed using the KMnO4 oxidation method by oxalic acid, described by Naiki et al., (2014). For analysis by FAAS, the calcium concentration obtained was converted to that of oxalic acid, according to the formula described in the AOAC (1990), with adaptations. The results were expressed on a dry basis. In the spectrophotometer analyses, the leaves presented 27.5 ± 0.96 g/100g for M1 and 12.2 ± 1.1 g/100g for M2, showing a significant difference (p<0.05) between the results. In the FAAS analyses, the leaves presented 5.8 ± 0.5 g/100g for M1 and 6.1 g/100g for M2, with no significant difference (p<0.05) between the results. The very high levels found for the e... Mostrar Tudo |
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Palavras-Chave: |
Acid digestion; Química verde; Spectrometry. |
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Thesagro: |
Ácido Oxálico; Beldroega; Espectrofotometria; Extração; Tecnologia de Alimento. |
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Thesaurus Nal: |
Calcium oxalate; Extraction; Food technology; Spectrophotometers. |
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Categoria do assunto: |
Q Alimentos e Nutrição Humana |
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Marc: |
LEADER 03034nam a2200349 a 4500
001 2171060
005 2025-01-28
008 2024 bl uuuu u00u1 u #d
100 1 $aSOUZA, P. G. DE
245 $aComparison between methods of extraction and analysis of oxalic acid by flame atomic absorption spectrometry and uv-vis spectrophotometer in purslane leaves (Portulaca Oleracea L.).$h[electronic resource]
260 $aIn: SIMPóSIO LATINO AMERICANO DE CIÊNCIA DE ALIMENTOS E NUTRIÇÃO, 15., 2023, Campinas. Anais eletrônicos..., Galoá$c2024
500 $aSLACAN. Pôster 166099.
520 $aOxalic acid is an antinutrient that can complex with minerals such as calcium, reducing the bioaccessibility of this essential element, in addition to increasing the risk of generating oxalate crystals in the kidneys. Purslane (Portulaca oleracea L.), a Non-conventional edible plants (NCEP), has a high content of oxalic acid. Thus, this study aimed to compare two methods of extraction and analysis for the determination of oxalic acid in lyophilized purslane leaves. For extraction, two methods were used: the first, described by Adeneyi et al., (2009), where 6M HCl was used with heating for 1 hour (M1); and the second, described by Naiki et al., (2014), where 0.25N HCl was used, with heating for 15 min (M2). For both methods, an oxalate precipitation step was performed. The analyzes using the UV-vis spectrophotometer were performed using the KMnO4 oxidation method by oxalic acid, described by Naiki et al., (2014). For analysis by FAAS, the calcium concentration obtained was converted to that of oxalic acid, according to the formula described in the AOAC (1990), with adaptations. The results were expressed on a dry basis. In the spectrophotometer analyses, the leaves presented 27.5 ± 0.96 g/100g for M1 and 12.2 ± 1.1 g/100g for M2, showing a significant difference (p<0.05) between the results. In the FAAS analyses, the leaves presented 5.8 ± 0.5 g/100g for M1 and 6.1 g/100g for M2, with no significant difference (p<0.05) between the results. The very high levels found for the extraction using 6M HCl for 1 hour may have favored the extraction and precipitation of compounds that were not of interest, causing reactional interferences during the permanganate oxidation step. Extraction with more dilute acid contributes to Green Chemistry and FAAS analysis proved to be adequate for the determination of this antinutrient in purslane.
650 $aCalcium oxalate
650 $aExtraction
650 $aFood technology
650 $aSpectrophotometers
650 $aÁcido Oxálico
650 $aBeldroega
650 $aEspectrofotometria
650 $aExtração
650 $aTecnologia de Alimento
653 $aAcid digestion
653 $aQuímica verde
653 $aSpectrometry
700 1 $aSANTOS, A. C. C. dos
700 1 $aORLANDO, E.
700 1 $aTRINDADE, M. E. F.
700 1 $aPALLONE, J.
700 1 $aAYRES, E. M. M.
700 1 $aROSENTHAL, A.
700 1 $aTEODORO, A. J.
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Embrapa Agroindústria de Alimentos (CTAA) |
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| 3. |  | JORCELINO, T. M.; GUIMARÃES, G. C.; GELELETE, T. B.; MORENO, A. B.; SANCHES, M. M.; CARVALHO, R. de C. P.; SILVA, M. S.; NEVES, W. dos S. Levantamento e caracterização de vírus em cultivos comerciais de morangueiro (Fragaria spp.) na região administrativa Brazlândia (DF). In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 6., 2020. Anais... Fortaleza: Sociedade Brasileira de Recursos Genéticos, 2020. O evento foi realizado de 09 a 12 de novembro de 2020 em formato totalmente digital.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 4. | | JORCELINO, T. M.; GUIMARÃES, G. C.; GELELETE, T. B.; SANCHES, M. M.; CARVALHO, R. de C. P.; SILVA, M. S.; NEVES, W. dos S. Ocorrência de BWYV associado a sintomas de vermelhão foliar em cultivo comercial de morango no Distrito Federal. In: WORKSHOP INTERNACIONAL DE DEFESA SANITÁRIA VEGETAL, 2., 2020, Viçosa. Anais... Viçosa, MG:UFV, 2020. p. 128.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 5. | | JORCELINO, T. M.; GUIMARÃES, G. C.; GELELETE, T. B.; MORENO, A. B.; SANCHES, M. M.; CARVALHO, R. de C. P.; SILVA, M. S.; NEVES, W. dos S. Occurrence of BWYV associated with redness leaf symptoms in commercial strawberry cultivation in the Federal District - Brazil. In: CONGRESSO BRASILEIRO DE VIROLOGIA, 31.; XV ENCONTRO DE VIROLOGIA DO MERCOSUL, 15., 2020. Anais... [S.l.]: SBV, 2020.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 6. | | LIMA, B. P. de; ALVES-FREITAS, D. M. T.; MELO, F. L. de; CARVALHO, R. de C. P.; FARIA, J. C. de; RIBEIRO, S. G. Characterization of a new whitefly-transmitted (Bemisia tabaci Meam 1) cytorhabdovirus infecting common bean. In: CONGRESSO NACIONAL DE PESQUISA DE FEIJÃO, 12., 2017, Piracicaba. Produtividade e sustentabilidade da cultura do feijão: do campo para a mesa: resumos. Piracicaba: CENA: IAC, 2017. p. 52. CONAFE| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão; Embrapa Recursos Genéticos e Biotecnologia. |
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| 7. | | REIS, L. de N. A. dos; BOITEUX, L. S.; FONSECA, M. E. N.; ROJAS, M. R.; GILBERTSON, R. L.; CARVALHO, R. de C. P. Tomato golden net virus and tomato yellow net virus: two novel New World begomoviruses with monopartite genomes. Archives of Virology, v. 168, n. 2, article number 235, 2023.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Hortaliças. |
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