https://repositorio.ufba.br/handle/ri/15989
metadata.dc.type: | Artigo de Periódico |
Título : | Online preconcentration system for determining ultratrace amounts of Cd in vegetal samples using thermospray flame furnace atomic absorption spectrometry |
Otros títulos : | Microchimica Acta |
Autor : | Amorim, Fábio Alan Carqueija Bezerra, Marcos de Almeida |
metadata.dc.creator: | Amorim, Fábio Alan Carqueija Bezerra, Marcos de Almeida |
Resumen : | A system has been developed for online preconcentration and determination of Cd using thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS). It is based on the solid-phase extraction of Cd in an Amberlite XAD-2 minicolumn loaded with 2-(2-thiazolylazo)-5-dimethylaminophenol (TAM), and the metal ion is eluted with 1 mol L−1 hydrochloridric acid, followed by its determination. The online system allows determining Cd with a detection limit of 8.0 ng L−1 and a quantification limit of 25.0 ng L−1. The precision (repeatability), calculated as the relative standard deviation (% RSD) in sample solutions containing 0.5 and 3.0 µg L−1 of Cd, was 6.1 and 4.5%, respectively. The preconcentration factor obtained was 24. The system’s accuracy was confirmed by analyzing the following certified reference materials (CRMs): Rice flour NIES 10b, Apple leaves NIST 1515 and Orchard leaves NBS 1571. This procedure was applied to the determination of Cd in cabbage and powdered guarana samples. |
Palabras clave : | TS-FF-AAS Cd determination Vegetal samples |
metadata.dc.rights: | Acesso Aberto |
URI : | http://repositorio.ufba.br/ri/handle/ri/15989 |
Fecha de publicación : | 2007 |
Aparece en las colecciones: | Artigo Publicado em Periódico (ICADS) |
Fichero | Descripción | Tamaño | Formato | |
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art%3A10.1007%2Fs00604-006-0713-8.pdf | 115,12 kB | Adobe PDF | Visualizar/Abrir |
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