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Registro Completo |
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Biblioteca(s): |
Embrapa Agroindústria Tropical; Embrapa Algodão; Embrapa Meio Ambiente. |
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Data corrente: |
23/05/1997 |
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Data da última atualização: |
23/05/1997 |
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Autoria: |
ZARONI, M. M. H.; NICOLELLA, G. |
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Afiliação: |
EMBRAPA-CNPMA. |
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Título: |
Introducao aos metodos de analise de dados multivariados objetivando tipificacao de propriedades rurais. |
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Ano de publicação: |
1987 |
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Fonte/Imprenta: |
[S.l: s.n.], 1987. |
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Páginas: |
32p. |
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Idioma: |
Português |
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Palavras-Chave: |
Analises; Analisis; Coeficiente de correlacao linear; Metodos quantitativos; Variaveis. |
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Thesagro: |
Agricultura; Análise de Dados; Estatística. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00615nam a2200217 a 4500
001 1012645
005 1997-05-23
008 1987 bl uuuu u0uu1 u #d
100 1 $aZARONI, M. M. H.
245 $aIntroducao aos metodos de analise de dados multivariados objetivando tipificacao de propriedades rurais.
260 $a[S.l: s.n.]$c1987
300 $a32p.
650 $aAgricultura
650 $aAnálise de Dados
650 $aEstatística
653 $aAnalises
653 $aAnalisis
653 $aCoeficiente de correlacao linear
653 $aMetodos quantitativos
653 $aVariaveis
700 1 $aNICOLELLA, G.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
10/11/2010 |
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Data da última atualização: |
19/07/2011 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
CARAPELLI, R.; GUERRA, M. B. B.; MIRANDA, K. dos A. de; PEREIRA FILHO, E. R.; NOGUEIRA, A. R. de A. |
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Afiliação: |
RODOLFO CARAPELLI, UFSCar/SÃO CARLOS, SP; MARCELO BRAGA BUENO GUERRA, UFSCar/SÃO CARLOS, SP; KELBER DOS ANJOS DE MIRANDA, UFSCar/SÃO CARLOS, SP; EDENIR RODRIGUES PEREIRA FILHO, UFSCar/SÃO CARLOS, SP; ANA RITA DE ARAUJO NOGUEIRA, CPPSE. |
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Título: |
Potentialities of hydride generation atomic absorption spectrometry (HGAAS) in the fast sequential determination of AS, BI and SB. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
In: RIO SYMPOSIUM ON ATOMIC SPECTROMETRY, 11., 2010, Mar del Prata: Horiba, 2010. |
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Páginas: |
p. 169 |
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Idioma: |
Português |
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Conteúdo: |
In this study, a sensitive hydride generation method was combined with fast sequential flame atomic absorption spectrometry (FS-FAAS) for the sequential determination of As, Bi and Sb in water samples. A Doehlert design was performed to identify a compromise condition to determine sequentially the three elements. The best condition was reached using NaBH40.8 % mv-1as the reducing agent. Another four variables were also tested: HCI concentration as the carrier solution (2 to 10 mol L-1), KI concentration as the pre-reductor solution (1 to 7 % mv-1), employment of ascorbic acid (0 to 6 % mv-1) as auxiliary pre-reductor, and integration time (3 replicates of 0.5 to 2 s). All these evaluated conditions were not significant at the investigated levels. Therefore, the optimized parameters were: HCI 6 mol L-1 in order to avoid interferences from the matrix, KI 1 % mv-1 without ascorbic acid to reduce reagent consumption and waste generation, finally, because of the lower delay time (20s) of the measurements, integration time of 1 s with 5 replicates was employed to precision improvement. That delay time was chosen as the minimum time to signal stabilization after the entire signal profile examination. The linear ranges were from 0.5 to 1 0 ~g L-1 of As, Bi and Sb. The accuracy of the proposed method was checked using two Certified Reference Materials (CRM) related with trace metals in water, HPS-TMDW and NIST 1643e. The results obtained for both CRM were in agreement with the certified value, with the following recoveries: As (average of 76%), Bi (average of 104%), Sb (average of 89 %).The proposed method has several advantages for routine analysis of As, Bi and Sb in water such as: good sensitivity (LaD: 0.132mg L- 1for As, 0.088mg L-1for Bi and 0.110mg L-1for Sb; n=10), high analytical throughput (270 determinations per hour), and low reagent consumption when compared with single elements determinations. MenosIn this study, a sensitive hydride generation method was combined with fast sequential flame atomic absorption spectrometry (FS-FAAS) for the sequential determination of As, Bi and Sb in water samples. A Doehlert design was performed to identify a compromise condition to determine sequentially the three elements. The best condition was reached using NaBH40.8 % mv-1as the reducing agent. Another four variables were also tested: HCI concentration as the carrier solution (2 to 10 mol L-1), KI concentration as the pre-reductor solution (1 to 7 % mv-1), employment of ascorbic acid (0 to 6 % mv-1) as auxiliary pre-reductor, and integration time (3 replicates of 0.5 to 2 s). All these evaluated conditions were not significant at the investigated levels. Therefore, the optimized parameters were: HCI 6 mol L-1 in order to avoid interferences from the matrix, KI 1 % mv-1 without ascorbic acid to reduce reagent consumption and waste generation, finally, because of the lower delay time (20s) of the measurements, integration time of 1 s with 5 replicates was employed to precision improvement. That delay time was chosen as the minimum time to signal stabilization after the entire signal profile examination. The linear ranges were from 0.5 to 1 0 ~g L-1 of As, Bi and Sb. The accuracy of the proposed method was checked using two Certified Reference Materials (CRM) related with trace metals in water, HPS-TMDW and NIST 1643e. The results obtained for both CRM were in agreement with the certif... Mostrar Tudo |
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Palavras-Chave: |
Atomic absorption; BS, BI, SB; Spectrometry (HAAGS). |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/37794/1/PROCI-2010.00197.pdf
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Marc: |
LEADER 02611nam a2200205 a 4500
001 1866644
005 2011-07-19
008 2010 bl uuuu u00u1 u #d
100 1 $aCARAPELLI, R.
245 $aPotentialities of hydride generation atomic absorption spectrometry (HGAAS) in the fast sequential determination of AS, BI and SB.
260 $aIn: RIO SYMPOSIUM ON ATOMIC SPECTROMETRY, 11., 2010, Mar del Prata: Horiba$c2010
300 $ap. 169
520 $aIn this study, a sensitive hydride generation method was combined with fast sequential flame atomic absorption spectrometry (FS-FAAS) for the sequential determination of As, Bi and Sb in water samples. A Doehlert design was performed to identify a compromise condition to determine sequentially the three elements. The best condition was reached using NaBH40.8 % mv-1as the reducing agent. Another four variables were also tested: HCI concentration as the carrier solution (2 to 10 mol L-1), KI concentration as the pre-reductor solution (1 to 7 % mv-1), employment of ascorbic acid (0 to 6 % mv-1) as auxiliary pre-reductor, and integration time (3 replicates of 0.5 to 2 s). All these evaluated conditions were not significant at the investigated levels. Therefore, the optimized parameters were: HCI 6 mol L-1 in order to avoid interferences from the matrix, KI 1 % mv-1 without ascorbic acid to reduce reagent consumption and waste generation, finally, because of the lower delay time (20s) of the measurements, integration time of 1 s with 5 replicates was employed to precision improvement. That delay time was chosen as the minimum time to signal stabilization after the entire signal profile examination. The linear ranges were from 0.5 to 1 0 ~g L-1 of As, Bi and Sb. The accuracy of the proposed method was checked using two Certified Reference Materials (CRM) related with trace metals in water, HPS-TMDW and NIST 1643e. The results obtained for both CRM were in agreement with the certified value, with the following recoveries: As (average of 76%), Bi (average of 104%), Sb (average of 89 %).The proposed method has several advantages for routine analysis of As, Bi and Sb in water such as: good sensitivity (LaD: 0.132mg L- 1for As, 0.088mg L-1for Bi and 0.110mg L-1for Sb; n=10), high analytical throughput (270 determinations per hour), and low reagent consumption when compared with single elements determinations.
653 $aAtomic absorption
653 $aBS, BI, SB
653 $aSpectrometry (HAAGS)
700 1 $aGUERRA, M. B. B.
700 1 $aMIRANDA, K. dos A. de
700 1 $aPEREIRA FILHO, E. R.
700 1 $aNOGUEIRA, A. R. de A.
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Embrapa Pecuária Sudeste (CPPSE) |
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