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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: |
04/12/2018 |
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Data da última atualização: |
04/12/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MACHADO, R. C.; SILVA, A. B. S.; DONATI, G. L.; NOGUEIRA, A. R. de A. |
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Afiliação: |
Raquel Cardoso Machado, UFSCar; Ana Beatriz S. Silva, UFSCar; George L. Donati, Wake Forest University; ANA RITA DE ARAUJO NOGUEIRA, CPPSE. |
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Título: |
Multi-energy calibration as a strategy for elemental analysis of fertilizers by microwave-induced plasma optical emission spectrometry. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Journal of Analytical Atomic Spectrometry, v.33, n.7, p.1168-1172, 2018. |
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DOI: |
10.1039/C8JA00077H |
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Idioma: |
Inglês |
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Conteúdo: |
Multi-energy calibration (MEC) was applied for the determination of As, Ba, Cd, Cr, and Pb in fertilizer samples by microwave-induced plasma optical emission spectrometry. Commercial fertilizer samples and a certified reference material of mineral fertilizer (CRM NIST 695) were digested using microwave-assisted acid. The MEC approach was carried out using only two calibration solutions: S1, composed of 50% v/v digested sample and 50% v/v standard reference solution containing the analytes, and S2, composed of 50% v/v sample and 50% v/v blank solution. The accuracy of the method was evaluated by analyzing CRM NIST 695, with recoveries in the 96?101% range. Addition and recovery experiments were also carried out for Cd determination, with recoveries between 92 and 105% for the evaluated samples. The MEC strategy was compared with traditional external standard calibration and standard additions methods and was the only one to provide accurate results for all evaluated analytes. |
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Thesaurus Nal: |
Fertilizer analysis; Fertilizers. |
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Categoria do assunto: |
W Química e Física |
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Marc: |
LEADER 01648naa a2200193 a 4500
001 2100705
005 2018-12-04
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1039/C8JA00077H$2DOI
100 1 $aMACHADO, R. C.
245 $aMulti-energy calibration as a strategy for elemental analysis of fertilizers by microwave-induced plasma optical emission spectrometry.$h[electronic resource]
260 $c2018
520 $aMulti-energy calibration (MEC) was applied for the determination of As, Ba, Cd, Cr, and Pb in fertilizer samples by microwave-induced plasma optical emission spectrometry. Commercial fertilizer samples and a certified reference material of mineral fertilizer (CRM NIST 695) were digested using microwave-assisted acid. The MEC approach was carried out using only two calibration solutions: S1, composed of 50% v/v digested sample and 50% v/v standard reference solution containing the analytes, and S2, composed of 50% v/v sample and 50% v/v blank solution. The accuracy of the method was evaluated by analyzing CRM NIST 695, with recoveries in the 96?101% range. Addition and recovery experiments were also carried out for Cd determination, with recoveries between 92 and 105% for the evaluated samples. The MEC strategy was compared with traditional external standard calibration and standard additions methods and was the only one to provide accurate results for all evaluated analytes.
650 $aFertilizer analysis
650 $aFertilizers
700 1 $aSILVA, A. B. S.
700 1 $aDONATI, G. L.
700 1 $aNOGUEIRA, A. R. de A.
773 $tJournal of Analytical Atomic Spectrometry$gv.33, n.7, p.1168-1172, 2018.
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
09/05/2018 |
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Data da última atualização: |
16/04/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SILVA NETO, E. C. da; CALEGARI, M. R.; PEREIRA, M. G.; MARANHÃO, D. D. C.; SCHIAVO, J. A.; FONTANA, A.; FERNANDES, J. C. F. |
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Afiliação: |
EDUARDO CARVALHO DA SILVA NETO, UFRRJ; MARCIA REGINA CALEGARI, UNIOESTE; MARCOS GERVASIO PEREIRA, UFRRJ; DEYVID DIEGO CARVALHO MARANHÃO, UFRRJ; JOLIMAR ANTONIO SCHIAVO, UEMS; ADEMIR FONTANA, CNPS; JÚLIO CÉSAR FEITOSA FERNANDES, UFRRJ. |
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Título: |
Phytoliths as indicators of pedogenesis and paleoenvironmental changes in Spodosols of the state of Rio de Janeiro, Brazil. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Science of the Total Environment, v. 636, p. 1070-1080, Sept. 2018. |
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DOI: |
10.1016/j.scitotenv.2018.04.313 |
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Idioma: |
Inglês |
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Conteúdo: |
This study aims to contribute toward a better understanding of the current biodiversity patterns existing in the Atlantic Forest of the state of Rio de Janeiro from a paleo-ecological approach. Three soil profiles, each formed fromdistinct source materials under varied climate and vegetation conditions were selected fromthe coastal regions of Rio de Janeiro, Brazil. Soil horizon samples for chemical and physical characterization were collected from 10 cm-interval depths, and the total organic carbon was determined in addition to performing isotype and phytolithic analyses. The phytolithic analysis associated with the isotopic techniques (delta13C) permitted the characterization of three stages of paleo-environmental evolution for the studied soils, presenting valid trends that indicate small variations within the phytosociological structure of the vegetation along a Spodosols line in the studied areas. These stages indicated that the phytolithic assemblage was formed from a vegetation profile containing more trees, adapted to conditions colder than the existing vegetation, although no environmental changes were detected using the isotopic data. The milder temperature conditions may have favored the pedogenetic processes of the spodic B horizon formation as well as the maintenance of the organic matter contained in the soil. This study serves as the first draft for the paleo-environmental association among the regions where the analyzed profiles are found. |
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Palavras-Chave: |
Mata Atlântica; Paleoambiente. |
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Thesagro: |
Carbono; Matéria Orgânica. |
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Thesaurus NAL: |
Carbon; Forests; Organic matter. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02369naa a2200289 a 4500
001 2091266
005 2019-04-16
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1016/j.scitotenv.2018.04.313$2DOI
100 1 $aSILVA NETO, E. C. da
245 $aPhytoliths as indicators of pedogenesis and paleoenvironmental changes in Spodosols of the state of Rio de Janeiro, Brazil.$h[electronic resource]
260 $c2018
520 $aThis study aims to contribute toward a better understanding of the current biodiversity patterns existing in the Atlantic Forest of the state of Rio de Janeiro from a paleo-ecological approach. Three soil profiles, each formed fromdistinct source materials under varied climate and vegetation conditions were selected fromthe coastal regions of Rio de Janeiro, Brazil. Soil horizon samples for chemical and physical characterization were collected from 10 cm-interval depths, and the total organic carbon was determined in addition to performing isotype and phytolithic analyses. The phytolithic analysis associated with the isotopic techniques (delta13C) permitted the characterization of three stages of paleo-environmental evolution for the studied soils, presenting valid trends that indicate small variations within the phytosociological structure of the vegetation along a Spodosols line in the studied areas. These stages indicated that the phytolithic assemblage was formed from a vegetation profile containing more trees, adapted to conditions colder than the existing vegetation, although no environmental changes were detected using the isotopic data. The milder temperature conditions may have favored the pedogenetic processes of the spodic B horizon formation as well as the maintenance of the organic matter contained in the soil. This study serves as the first draft for the paleo-environmental association among the regions where the analyzed profiles are found.
650 $aCarbon
650 $aForests
650 $aOrganic matter
650 $aCarbono
650 $aMatéria Orgânica
653 $aMata Atlântica
653 $aPaleoambiente
700 1 $aCALEGARI, M. R.
700 1 $aPEREIRA, M. G.
700 1 $aMARANHÃO, D. D. C.
700 1 $aSCHIAVO, J. A.
700 1 $aFONTANA, A.
700 1 $aFERNANDES, J. C. F.
773 $tScience of the Total Environment$gv. 636, p. 1070-1080, Sept. 2018.
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