Campo DC | Valor | Idioma |
dc.contributor.author | Cassella, Ricardo Jorgensen | - |
dc.contributor.author | Bitencourt, Denise Teixeira | - |
dc.contributor.author | Branco, Aline Garcia | - |
dc.contributor.author | Ferreira, Sergio Luis Costa | - |
dc.contributor.author | Jesus, Djane Santiago de | - |
dc.contributor.author | Carvalho, Marcelo Souza de | - |
dc.contributor.author | Santelli, Ricardo Erthal | - |
dc.creator | Cassella, Ricardo Jorgensen | - |
dc.creator | Bitencourt, Denise Teixeira | - |
dc.creator | Branco, Aline Garcia | - |
dc.creator | Ferreira, Sergio Luis Costa | - |
dc.creator | Jesus, Djane Santiago de | - |
dc.creator | Carvalho, Marcelo Souza de | - |
dc.creator | Santelli, Ricardo Erthal | - |
dc.date.accessioned | 2013-08-01T18:13:14Z | - |
dc.date.available | 2013-08-01T18:13:14Z | - |
dc.date.issued | 1999 | - |
dc.identifier.issn | 0267-9477 | - |
dc.identifier.uri | http://www.repositorio.ufba.br/ri/handle/ri/12402 | - |
dc.description | p. 1749-1753 | pt_BR |
dc.description.abstract | An on-line procedure for the preconcentration and determination of zinc in waters and biological materials was
developed. Zinc is preconcentrated from acidic medium (pH 3.0) as its thiocyanate complex onto a
polyurethane foam mini-column placed in the loop of a four-way valve. The elution step is performed with a
stream of 30% acetone in 2% HNO3 and the zinc displaced is introduced directly into the nebuliser of a ¯ame
atomic absorption spectrometer. The system was operated under two different preconcentration times since the
concentration of zinc in the two types of samples was different. For biological samples, 1 min was used and a
detection limit of 3.0 mg L21 was achieved with a throughput of 40 samples per hour. At a concentration of
20 mg L21, an RSD of 2.5% was obtained. For the determination of zinc in natural water, a preconcentration
time of 3 min was employed and a detection limit of 0.85 mg L21 was obtained. In this case, the system was
slower with a throughput of 17 samples per hour. The RSD at 10 mg L21 was 6.0%. The continuous ¯ow
system was applied to the analysis of several biological reference materials and natural water samples. | pt_BR |
dc.language.iso | en | pt_BR |
dc.publisher | Journal of Analytical Atomic Spectrometry | pt_BR |
dc.source | 10.1039/A904997E | pt_BR |
dc.title | On-line preconcentration system for ¯ame atomic absorption spectrometry using unloaded polyurethane foam: determination of zinc in waters and biological materials | pt_BR |
dc.title.alternative | Journal of Analytical Atomic Spectrometry | pt_BR |
dc.type | Artigo de Periódico | pt_BR |
dc.description.localpub | Salvador | pt_BR |
dc.identifier.number | v. 11 | pt_BR |
Aparece nas coleções: | Artigo Publicado em Periódico (Química)
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