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https://repositorio.ufba.br/handle/ri/7756
metadata.dc.type: | Artigo de Periódico |
Título : | Flow injection determination of cobalt after its sorption onto polyurethane foam loaded with 2-(2-thiazolylazo)-p-cresol (TAC) |
Otros títulos : | Talanta |
Autor : | Cassella, Ricardo Jorgensen Salim, Veronica A. Jesuı́no, Luciene S. Santelli, Ricardo Erthal Ferreira, Sergio Luis Costa Carvalho, Marcelo Souza de |
metadata.dc.creator: | Cassella, Ricardo Jorgensen Salim, Veronica A. Jesuı́no, Luciene S. Santelli, Ricardo Erthal Ferreira, Sergio Luis Costa Carvalho, Marcelo Souza de |
Resumen : | This paper reports the development of a new methodology for determination of cobalt in water samples by using a flow injection system with loaded PUF as solid phase to preconcentrate analytes. Procedure is based on on-line retention of Co(III) ions (generated in alkaline medium by Co(II) oxidation) in a minicolumn packed with a polyether type polyurethane foam loaded with TAC (2-(2-thiazolylazo)-p-cresol) and elution with 2 mol l−1 HCl directly to the flame atomic absorption spectrometer nebulizer. Several chemical and flow variables that could affect the performance of this system were investigated as well as the possible interferents. For 2 min of preconcentration time (10.0 ml of sample volume) the system achieved a detection limit 3.2 μg l−1, a R.S.D. 5% at 20 μg l−1 and an analytical throughput 24 h−1. Whereas for 3 min of preconcentration time (15.0 ml of sample volume) a detection limit 2.4 μg l−1, a R.S.D. under 8% at 10 μg l−1 and a sampling frequency 17 h−1 were reported. |
Palabras clave : | Polyurethane foam Cobalt Solid phase extraction Flow injection analysis |
URI : | http://www.repositorio.ufba.br/ri/handle/ri/7756 |
Fecha de publicación : | 2001 |
Aparece en las colecciones: | Artigo Publicado em Periódico (Química) |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
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Ferreira.pdf Restricted Access | 103,81 kB | Adobe PDF | Visualizar/Abrir Request a copy |
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