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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
11/07/2014 |
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Data da última atualização: |
29/03/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
AMARAL, C. D. B.; NOBREGA, J. A.; NOGUEIRA, A. R. de A. |
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Afiliação: |
CLARICE D. B. AMARAL, UFSCar/ APPLIES INSTRUMENTAL ANALYSIS/SÃO CARLOS, SP; JOAQUIM A. NÓBREGA, UFSCar/ APPLIES INSTRUMENTAL ANALYSIS/SÃO CARLOS, SP; ANA RITA DE ARAUJO NOGUEIRA, CPPSE. |
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Título: |
Investigation of arsenic species stability by HPLC-ICP-MS in plants stored under different conditions for 12 months. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Microchemical Journal, v. 117, p. 122-126, nov. 2014. |
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DOI: |
https://doi.org/10.1016/j.microc.2014.06.018 |
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Idioma: |
Inglês |
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Conteúdo: |
In studies of speciation, the conservation of species in their original forms is a very challenging issue, and the reliability of the results deeply depends on it. Preliminary steps of sample preparation and storage temperature may influence the conservation of species and extraction efficiency. Plant sample (Brachiaria brizantha Stapf. cv. Marandu) grown in As-containing soil was harvested and divided into four portions. The first portion was frozen-dried, milled with liquid N2 and stored at room temperature; the second portion was lyophilized and stored at 4 °C; and the remaining portions were kept at two storage temperatures (− 18 and − 80 °C) without any prior procedure. Aliquots of samples stored under different conditions were extracted every 2 months for a 12-month period. The total content of As was 2.30 ± 0.27 mg kg− 1 of dried and ground sample and As species were determined by HPLC-ICP-MS. The extraction was more efficient in sample aliquots that were lyophilized and ground (87–90%) than those only stored under different temperatures (53–66%). Furthermore, only for lyophilized and ground samples dimethylarsenic acid (DMA) was extracted. Concerning the storage time under the two tested temperatures, no significant differences on species were found and they remained stable. Standard deviations for replicates of samples that were not frozen-dried and ground were higher, and this behavior can be explained by sample heterogeneity. For the As species here studied it can be concluded that lyophilization and cryogenic grinding strategies were the most suitable sample pretreatments for As speciation in plant tissue. MenosIn studies of speciation, the conservation of species in their original forms is a very challenging issue, and the reliability of the results deeply depends on it. Preliminary steps of sample preparation and storage temperature may influence the conservation of species and extraction efficiency. Plant sample (Brachiaria brizantha Stapf. cv. Marandu) grown in As-containing soil was harvested and divided into four portions. The first portion was frozen-dried, milled with liquid N2 and stored at room temperature; the second portion was lyophilized and stored at 4 °C; and the remaining portions were kept at two storage temperatures (− 18 and − 80 °C) without any prior procedure. Aliquots of samples stored under different conditions were extracted every 2 months for a 12-month period. The total content of As was 2.30 ± 0.27 mg kg− 1 of dried and ground sample and As species were determined by HPLC-ICP-MS. The extraction was more efficient in sample aliquots that were lyophilized and ground (87–90%) than those only stored under different temperatures (53–66%). Furthermore, only for lyophilized and ground samples dimethylarsenic acid (DMA) was extracted. Concerning the storage time under the two tested temperatures, no significant differences on species were found and they remained stable. Standard deviations for replicates of samples that were not frozen-dried and ground were higher, and this behavior can be explained by sample heterogeneity. For the As species here studied it can... Mostrar Tudo |
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Palavras-Chave: |
HPLC ICP MS; Sample processing. |
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Thesaurus Nal: |
arsenic; storage. |
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Categoria do assunto: |
W Química e Física |
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Marc: |
LEADER 02331naa a2200205 a 4500
001 1990421
005 2023-03-29
008 2014 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.microc.2014.06.018$2DOI
100 1 $aAMARAL, C. D. B.
245 $aInvestigation of arsenic species stability by HPLC-ICP-MS in plants stored under different conditions for 12 months.$h[electronic resource]
260 $c2014
520 $aIn studies of speciation, the conservation of species in their original forms is a very challenging issue, and the reliability of the results deeply depends on it. Preliminary steps of sample preparation and storage temperature may influence the conservation of species and extraction efficiency. Plant sample (Brachiaria brizantha Stapf. cv. Marandu) grown in As-containing soil was harvested and divided into four portions. The first portion was frozen-dried, milled with liquid N2 and stored at room temperature; the second portion was lyophilized and stored at 4 °C; and the remaining portions were kept at two storage temperatures (− 18 and − 80 °C) without any prior procedure. Aliquots of samples stored under different conditions were extracted every 2 months for a 12-month period. The total content of As was 2.30 ± 0.27 mg kg− 1 of dried and ground sample and As species were determined by HPLC-ICP-MS. The extraction was more efficient in sample aliquots that were lyophilized and ground (87–90%) than those only stored under different temperatures (53–66%). Furthermore, only for lyophilized and ground samples dimethylarsenic acid (DMA) was extracted. Concerning the storage time under the two tested temperatures, no significant differences on species were found and they remained stable. Standard deviations for replicates of samples that were not frozen-dried and ground were higher, and this behavior can be explained by sample heterogeneity. For the As species here studied it can be concluded that lyophilization and cryogenic grinding strategies were the most suitable sample pretreatments for As speciation in plant tissue.
650 $aarsenic
650 $astorage
653 $aHPLC ICP MS
653 $aSample processing
700 1 $aNOBREGA, J. A.
700 1 $aNOGUEIRA, A. R. de A.
773 $tMicrochemical Journal$gv. 117, p. 122-126, nov. 2014.
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Embrapa Pecuária Sudeste (CPPSE) |
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| 4. |  | UHLMANN, A.; RAMOS, M. R.; ALMEIDA, R. E. M. de. Identificação das formas de vegetação nos pedoambientes relacionados aos perfis da RCC de Goiás e Tocantins. In: SANTOS, G. G.; OLIVEIRA, V. A. de; LUMBRERAS, J. F.; COELHO, M. R.; ALMEIDA, R. E. M. de; MADARI, B. E. (ed.). Guia de campo da XIV Reunião Brasileira de Classificação e Correlação de Solos: RCC de Goiás e Tocantins. Brasília, DF: Embrapa, 2023. E-book. cap. 5.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Pesca e Aquicultura. |
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| 14. | | RAMOS, M. R.; UHLMANN, A.; MELO, V. de F.; CURCIO, G. R.; CAGLIONI, E. Atributos de solos coesos e não coesos no Complexo Petroquímico do Rio de Janeiro, Itaboraí - RJ. Enciclopédia Biosfera, Goiânia, v. 11 n. 22, p. 360-375, 2015.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
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| 15. | | GOMES, J. B. V.; CURCIO, G. R.; DEDECK, R. A.; RAMOS, M. R. Atributos dos solos do complexo petroquímico Comperj em função de variações litotípicas, da paisagem e do uso atual. Pesquisa Florestal Brasileira, Colombo, v. 34, n. 77, p. 1-11, jan./mar. 2014.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 3 |
| Biblioteca(s): Embrapa Florestas. |
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| 16. | | CAGLIONI, E.; UHLMANN, A.; CURCIO, G. R.; RAMOS, M. R.; BONNET, A.; JUNCKES, A. R. Altitude e solos determinam variações abruptas da vegetação em gradiente altitudinal de Mata Atlântica. Rodriguésia, v. 69, n. 4, p. 2055-2068, out./dez. 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Florestas. |
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| 17. | | RAMOS, M. R.; CURCIO, G. R.; DEDECEK, R. A.; MELO, V. F. de. Disponibilidade de água em solos para reflorestamento no Tabuleiros Costeiros, Município de Itaboraí, RJ. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 33., 2011, Uberlândia. Solos nos biomas brasileiros: sustentabilidade e mudanças climáticas: anais. Uberlândia: Sociedade Brasileira de Ciência do Solo, 2011. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Florestas. |
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| 18. | | RAMOS, M. R.; SOARES, M. M.; SANTOS, D. A. dos; UHLMANN, A. Diagnosis of the soybean production sector in Porto Nacional, Tocantins, Brazil. Revista Brasileira de Planejamento e Desenvolvimento, v. 10, n. 2, p. 242-258, mai./ago. 2021.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 3 |
| Biblioteca(s): Embrapa Pesca e Aquicultura. |
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| 20. | | RAMOS, M. R.; CURCIO, G. R.; DEDECEK, R. A.; SILVA, A. R.; LUNZ, A. M. Levantamento e mapeamento de solos da fazenda Cristalina, São Domingos do Araguaia, PA. In: ENCONTRO DE CIÊNCIA DO SOLO DA AMAZÔNIA ORIENTAL, 2., 2016, Capanema. [Anais]. [Belém, PA: UFRA], 2016. 4 p.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental; Embrapa Florestas. |
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| Registros recuperados : 61 | |
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