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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/7856
Tipo: Artigo de Periódico
Título: A separation method to overcome the interference of aluminium on zinc determination by inductively coupled plasma atomic emission spectroscopy
Título(s) alternativo(s): Spectrochimica Acta Part B: Atomic Spectroscopy
Autor(es): Jesus, Djane S. de
Korn, Maria das Graças Andrade
Ferreira, Sergio Luis Costa
Carvalho, Marcelo Souza de
Autor(es): Jesus, Djane S. de
Korn, Maria das Graças Andrade
Ferreira, Sergio Luis Costa
Carvalho, Marcelo Souza de
Abstract: The use of polyurethane foam (PUF) to separate zinc from large amounts of aluminium and its determination by inductively coupled plasma atomic emission spectroscopy technique (ICP-AES) in aluminium matrices is described. The proposed method is based on the solid-phase extraction of the zinc(II) cation as a thiocyanate complex. Parameters such as effect of pH on zinc sorption, zinc desorption from the foam and analytical features of the procedure were studied. Results showed that the zinc(II) cation within the range from 0.02 to 65.0 μg in 0.2 mol l−1 thiocyanate solution and pH range from 1.0 to 4.0, could be quantitatively extracted by 0.1 g of PUF. The precision of the method was calculated as the relative standard deviation from a series of seven measurements. It was 3.9% for 1.0 μg of zinc in a volume solution of 50 ml. The proposed procedure was used for zinc determination in both aluminium alloys and salts with zinc concentration in the range from 50 to 300 μg g−1. A standard addition technique was used and achieved results showing that this procedure has good accuracy and precision.
Palavras-chave: Zn determination
ICP-AES
Aluminium
URI: http://www.repositorio.ufba.br/ri/handle/ri/7856
Data do documento: 2000
Aparece nas coleções:Artigo Publicado em Periódico (Química)

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