Sorption and preconcentration of metal ions on silica gel modified with 2,5-dimercapto-1,3,4-thiadiazole
Nenhuma Miniatura disponível
Data
1996-06-28
Autores
Lessi, P.
Dias, N. L.
Moreira, J. C.
Campos, JTS
Título da Revista
ISSN da Revista
Título de Volume
Editor
Elsevier B.V.
Resumo
Silica gel, chemically modified with 2,5-dimercapto-1,3,4-thiadiazole [=Si(CH2)(3)-NC2HNS3], abbreviated as SiB, was used to adsorb metal ions from ethanol by both batch and column techniques. Elution of Cu(II) was done with a solvent mixture of acetone and hydrochloric acid (9:1 v/v). Zn(II), Cd(II), Ni(II), Pb(II), Co(II) and Fe(III) were eluted with 0.5 mol l(-1) HC1 in ethanol solution. The modified silica was applied in the preconcentration of metal ions from commercial ethanol, normally used as engine fuel. The method is suitable for quantifying these metals at low mu g l(-1) levels.
Descrição
Palavras-chave
preconcentration, silica gel functionalized, 2,5-dimercapto-1,3,4-thiadiazole, bismuthol I
Como citar
Analytica Chimica Acta. Amsterdam: Elsevier B.V., v. 327, n. 2, p. 183-190, 1996.