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Registros recuperados : 9 | |
6. | | FERNANDES, K. G.; MONTES BAYÓN, M.; BLANCO GONZÁLEZ, E.; NOGUEIRA, A. R. de A.; NOBREGA, J. A.; SANZ-MEDEL, A. Vanadium association to human serum proteins by fast protein liquid chomatography-ICP-MS. In: FRANCO-SPANISH WORKSHOP IN BIO-INORGANIC ANALYTICAL CHEMISTRY, 3., 2004, Oviedo. Book of abstracts... Oviedo: ASGUO, 2004. Biblioteca(s): Embrapa Pecuária Sudeste. |
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7. | | FERNANDES, K. G.; MONTES BAYÓN, M.; BLANCO GONZÁLEZ, E.; NOGUEIRA, A. R. de A.; NÓBREGA, J. A.; SANZ-MODEL, A. Speciation of vanadium in human serum proteins by high liquid chromatography with inductively coupled plasma mass spectrometric detection. In: EUROANALYSIS, 13., 2004, Salamanca. Salamnca: ALBAN, 2004. Biblioteca(s): Embrapa Pecuária Sudeste. |
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8. | | CRISPINO, C. C.; FERNANDES, K. G.; KAMOGAWA, M. Y.; NÓBREGA, J. A.; NOGUEIRA, A. R. de A.; FERREIRA, M. M. C. Multivariate classification of cigarretes according to their elemetal content determined by inductively coupled plasma optical emission spectrometry. Analytical Sciences, v. 23, n. 4, p. 435-438, apr. 2007. Biblioteca(s): Embrapa Pecuária Sudeste. |
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9. | | CRISPINO, C. C.; FERNANDES, K. G.; KAMOWAGA, M. Y.; NÓBREGA, J. A.; NOGUEIRA, A. R. de A.; FERREIRA, M. M. C. Aplicação da quimiometria na análise de metais em cigarros por ICP-OES. In: CONGRESSO NACIONAL DE QUÍMICA ANALÍTICA, 12., 2003, São Luís. Anais... São Luís: UFMA, 2003. QM 010. Biblioteca(s): Embrapa Pecuária Sudeste. |
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Registros recuperados : 9 | |
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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. |
Registro Completo
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
24/11/2004 |
Data da última atualização: |
31/05/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - B |
Autoria: |
FERNANDES, K. G.; NOGUEIRA, A. R. de A.; GOMES NETO, J. A.; NÓBREGA, J. A. |
Afiliação: |
KELLY G. FERNANDES, UFSCAR; ANA RITA DE ARAUJO NOGUEIRA, CPPSE; JOSÉ A. GOMES NETO, UNESP; JOAQUIM A. NÓBREGA, UFSCAR. |
Título: |
Determination of vanadium in urine by electrothermal atomic absorption spectrometry using hot injection and preconcentration into the graphite tube. |
Ano de publicação: |
2004 |
Fonte/Imprenta: |
Journal of Braziliand Chemical Society, v.15, n.5, p.676-681, 2004. |
Idioma: |
Inglês |
Conteúdo: |
In this work it was developed a procedure for the determination of vanadium in urine samples by electrothermal atomic absorption spectrometry using successive injections for preconcentration into a preheated graphite tube. Three 60?L volumes were sequentially injected into the atomizer preheated to a temperature of 110 ºC. Drying and pyrolysis steps were carried out after each injection. A chemical modifier, barium difluoride (100 mg L-1), and a surfactant, Triton X-100 (0.3% v v-1), were added to the urine sample. When injecting into a hot graphite tube, the sample flow-rate was 0.5?L s-1. The limits of detection and quantification were 0.54 and 1.82 without preconcentration, and 0.11 and 0.37 ?g L-1 with preconcentration, respectively. The accuracy of the procedure was evaluated by an addition-recovery experiment employing urine samples. Recoveries varied from 96.0 to 103% for additions ranging from 0.8 to 3.5 ?g L -1 V. The developed procedure allows the determination of vanadium in urine without any sample pretreatment and with minimal dilution of the sample. |
Palavras-Chave: |
ETAAS; Hot injecction; Preconcentration. |
Thesaurus NAL: |
urine; vanadium. |
Categoria do assunto: |
W Química e Física |
Marc: |
LEADER 01782naa a2200217 a 4500 001 1046881 005 2022-05-31 008 2004 bl uuuu u00u1 u #d 100 1 $aFERNANDES, K. G. 245 $aDetermination of vanadium in urine by electrothermal atomic absorption spectrometry using hot injection and preconcentration into the graphite tube.$h[electronic resource] 260 $c2004 520 $aIn this work it was developed a procedure for the determination of vanadium in urine samples by electrothermal atomic absorption spectrometry using successive injections for preconcentration into a preheated graphite tube. Three 60?L volumes were sequentially injected into the atomizer preheated to a temperature of 110 ºC. Drying and pyrolysis steps were carried out after each injection. A chemical modifier, barium difluoride (100 mg L-1), and a surfactant, Triton X-100 (0.3% v v-1), were added to the urine sample. When injecting into a hot graphite tube, the sample flow-rate was 0.5?L s-1. The limits of detection and quantification were 0.54 and 1.82 without preconcentration, and 0.11 and 0.37 ?g L-1 with preconcentration, respectively. The accuracy of the procedure was evaluated by an addition-recovery experiment employing urine samples. Recoveries varied from 96.0 to 103% for additions ranging from 0.8 to 3.5 ?g L -1 V. The developed procedure allows the determination of vanadium in urine without any sample pretreatment and with minimal dilution of the sample. 650 $aurine 650 $avanadium 653 $aETAAS 653 $aHot injecction 653 $aPreconcentration 700 1 $aNOGUEIRA, A. R. de A. 700 1 $aGOMES NETO, J. A. 700 1 $aNÓBREGA, J. A. 773 $tJournal of Braziliand Chemical Society$gv.15, n.5, p.676-681, 2004.
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