https://repositorio.ufba.br/handle/ri/15989
Tipo: | Artigo de Periódico |
Título: | Online preconcentration system for determining ultratrace amounts of Cd in vegetal samples using thermospray flame furnace atomic absorption spectrometry |
Título(s) alternativo(s): | Microchimica Acta |
Autor(es): | Amorim, Fábio Alan Carqueija Bezerra, Marcos de Almeida |
Autor(es): | Amorim, Fábio Alan Carqueija Bezerra, Marcos de Almeida |
Abstract: | 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. |
Palavras-chave: | TS-FF-AAS Cd determination Vegetal samples |
Tipo de Acesso: | Acesso Aberto |
URI: | http://repositorio.ufba.br/ri/handle/ri/15989 |
Data do documento: | 2007 |
Aparece nas coleções: | Artigo Publicado em Periódico (ICADS) |
Arquivo | Descrição | Tamanho | Formato | |
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art%3A10.1007%2Fs00604-006-0713-8.pdf | 115,12 kB | Adobe PDF | Visualizar/Abrir |
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