Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/23471
Type: Artigo de periódico
Title: Estudo polarográfico sobre a determinação de Fe(III) utilizando-se a técnica da polarografia de pulso diferencial
Title Alternative: Polarographic study about the determination of Fe(III) using the technique of differencial pulse polarography
Author: Aleixo, Luiz Manoel
Sitton, Melissa
Ribeiro, Fabiana Alves de Lima
Abstract: A differential pulse polarographic study with the objective to determine iron (III) in presense of copper (II) in a supporting electrolyte based on citrate - EDTA was made. The best experimental conditions found were a supporting electrolyte of citrate 0.25 mol L-1, EDTA 0.050 mol L-1 and KNO3 0.50 mol L-1, pH 5.00. In this media iron (III) showed a polarographic peak in -0.08 V and the copper (II) in -0.34 V, both vs. Ag/AgCl (saturated KCl). Thus, a analytical method was developed and applied to determine iron (III) in brass alloy, a matrix were copper is in large excess over iron. The results obtained showed no interference of copper in the iron determination. The value of 0.21% of iron in the sample alloy composition was obtained and the method was validated by atomic absortion and recovery test, and the results exhibited a good agreement with the proposed method.
Subject: iron (III) determination
differential pulse polarography
brass analysis
Editor: Sociedade Brasileira de Química
Rights: aberto
Identifier DOI: 10.1590/S0100-40422001000600016
Address: http://dx.doi.org/10.1590/S0100-40422001000600016
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422001000600016
Date Issue: 1-Dec-2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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