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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
03/05/2011 |
Data da última atualização: |
29/06/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
GUERRA, M. B. B.; CARAPELLI, R.; MIRANDA, K.; NOGUEIRA, A. R. de A.; PEREIRA FILHO, E. R. |
Afiliação: |
MARCELO BRAGA BUENO GUERRA, UNIVERSIDADE FEDERAL DE SÃO CARLOS/SÃO CARLOS, SP; RODOLFO CARAPELLI, UFSCar/SÃO CARLOS, SP; KELBER MIRANDA, UFSCar/SÃO CARLOS, SP; ANA RITA DE ARAUJO NOGUEIRA, CPPSE; EDENIR RODRIGUES PEREIRA FILHO, UFSCar/SÃO CARLOS, SP. |
Título: |
Determination of As and Sb in mineral waters by fast sequential continuous flow hydride generation atomic absorption spectrometry. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
Analytical Methods, v. 3, p. 599-604, 2011. |
Idioma: |
Português |
Conteúdo: |
In this study, a novel analytical method which consists of a combination of Fast Sequential Flame Atomic Absorption Spectrometry (FS-FAAS) and Continuous Flow Hydride Generation Atomic Absorption Spectrometry (CF-HGAAS) is proposed. The method developed was employed for the sequential determination of As and Sb at sub-mg L1 levels in bottled mineral waters. A strong enhancement in the analytical throughput was obtained when compared with the traditional monoelement CF-HGAAS with a quartz tube atomizer (QTA). Variables which would affect the method performance such as Ar flow rate, HCl and NaBH4 concentrations as well as delay and integration time were optimized. A flame atomic absorption spectrometer working in fast sequential mode was used in all experiments. After just 20 s of read delay, As and Sb were sequentially determined in 6 s (3 s each element). A 262 fractional factorial design was employed for studies of potential interferents with transition metals that could be present in mineral water samples. Limits of detection obtained for As and Sb were 0.15 and 0.14 mg L1, respectively. The accuracy of the proposed method was checked by the use of 2 certified reference materials: Trace elements in water (NIST 1643e) and Trace metals in drinking water (HPS TMDW). Good agreement between certified and found concentrations was observed. Finally, As and Sb were determined in commercial bottled mineral water samples. Adequate sensitivity, high throughput and minimization of reagents and sample consumption are the attractive features of this new method. MenosIn this study, a novel analytical method which consists of a combination of Fast Sequential Flame Atomic Absorption Spectrometry (FS-FAAS) and Continuous Flow Hydride Generation Atomic Absorption Spectrometry (CF-HGAAS) is proposed. The method developed was employed for the sequential determination of As and Sb at sub-mg L1 levels in bottled mineral waters. A strong enhancement in the analytical throughput was obtained when compared with the traditional monoelement CF-HGAAS with a quartz tube atomizer (QTA). Variables which would affect the method performance such as Ar flow rate, HCl and NaBH4 concentrations as well as delay and integration time were optimized. A flame atomic absorption spectrometer working in fast sequential mode was used in all experiments. After just 20 s of read delay, As and Sb were sequentially determined in 6 s (3 s each element). A 262 fractional factorial design was employed for studies of potential interferents with transition metals that could be present in mineral water samples. Limits of detection obtained for As and Sb were 0.15 and 0.14 mg L1, respectively. The accuracy of the proposed method was checked by the use of 2 certified reference materials: Trace elements in water (NIST 1643e) and Trace metals in drinking water (HPS TMDW). Good agreement between certified and found concentrations was observed. Finally, As and Sb were determined in commercial bottled mineral water samples. Adequate sensitivity, high throughput and minimization of rea... Mostrar Tudo |
Palavras-Chave: |
As and Sb; Atomic absorption; Mineral waters; Spectrometry. |
Categoria do assunto: |
W Química e Física |
Marc: |
LEADER 02251naa a2200217 a 4500 001 1887516 005 2023-06-29 008 2011 bl uuuu u00u1 u #d 100 1 $aGUERRA, M. B. B. 245 $aDetermination of As and Sb in mineral waters by fast sequential continuous flow hydride generation atomic absorption spectrometry.$h[electronic resource] 260 $c2011 520 $aIn this study, a novel analytical method which consists of a combination of Fast Sequential Flame Atomic Absorption Spectrometry (FS-FAAS) and Continuous Flow Hydride Generation Atomic Absorption Spectrometry (CF-HGAAS) is proposed. The method developed was employed for the sequential determination of As and Sb at sub-mg L1 levels in bottled mineral waters. A strong enhancement in the analytical throughput was obtained when compared with the traditional monoelement CF-HGAAS with a quartz tube atomizer (QTA). Variables which would affect the method performance such as Ar flow rate, HCl and NaBH4 concentrations as well as delay and integration time were optimized. A flame atomic absorption spectrometer working in fast sequential mode was used in all experiments. After just 20 s of read delay, As and Sb were sequentially determined in 6 s (3 s each element). A 262 fractional factorial design was employed for studies of potential interferents with transition metals that could be present in mineral water samples. Limits of detection obtained for As and Sb were 0.15 and 0.14 mg L1, respectively. The accuracy of the proposed method was checked by the use of 2 certified reference materials: Trace elements in water (NIST 1643e) and Trace metals in drinking water (HPS TMDW). Good agreement between certified and found concentrations was observed. Finally, As and Sb were determined in commercial bottled mineral water samples. Adequate sensitivity, high throughput and minimization of reagents and sample consumption are the attractive features of this new method. 653 $aAs and Sb 653 $aAtomic absorption 653 $aMineral waters 653 $aSpectrometry 700 1 $aCARAPELLI, R. 700 1 $aMIRANDA, K. 700 1 $aNOGUEIRA, A. R. de A. 700 1 $aPEREIRA FILHO, E. R. 773 $tAnalytical Methods$gv. 3, p. 599-604, 2011.
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Embrapa Pecuária Sudeste (CPPSE) |
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Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
08/12/2016 |
Data da última atualização: |
11/07/2017 |
Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
Autoria: |
SIQUEIRA, G. L. de A. de; HORNUNG, P. S.; LAZZAROTTO, S. R. da S.; SCHNITZLER, E.; LAZZAROTTO, M. |
Afiliação: |
GEISA LIANDRA DE ANDRADE DE SIQUEIRA, UNIVERSIDADE ESTADUAL DE PONTA GROSSA; POLYANNA SILVEIRA HORNUNG, UNIVERSIDADE FEDERAL DO PARANÁ; SIMONE ROSA DA SILVEIRA LAZZAROTTO, UNIVERSIDADE FEDERAL DO PARANÁ; EGON SCHNITZLER, UNIVERSIDADE ESTADUAL DE PONTA GROSSA; MARCELO LAZZAROTTO, CNPF. |
Título: |
Efeito do processo de hidrólise ácida em amido na gelatinização visando à aplicação na indústria papeleira. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Colombo: Embrapa Florestas, 2016. |
Páginas: |
5 p. |
Série: |
(Embrapa Florestas. Comunicado técnico, 388). |
Idioma: |
Português |
Thesagro: |
Hidrolise. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/152947/1/CT-388-1311.pdf
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Marc: |
LEADER 00610nam a2200181 a 4500 001 2058278 005 2017-07-11 008 2016 bl uuuu u0uu1 u #d 100 1 $aSIQUEIRA, G. L. de A. de 245 $aEfeito do processo de hidrólise ácida em amido na gelatinização visando à aplicação na indústria papeleira.$h[electronic resource] 260 $aColombo: Embrapa Florestas$c2016 300 $a5 p. 490 $a(Embrapa Florestas. Comunicado técnico, 388). 650 $aHidrolise 700 1 $aHORNUNG, P. S. 700 1 $aLAZZAROTTO, S. R. da S. 700 1 $aSCHNITZLER, E. 700 1 $aLAZZAROTTO, M.
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