Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/23494
Type: Artigo de periódico
Title: Experimentos didáticos em química analítica envolvendo separação de fases e pré-concentração
Title Alternative: Didactic experiments in analytical chemistry involving phase separations and preconcentration
Author: Nascentes, Clésia C.
Arruda, Marco A. Z.
Maniasso, Nelson
Abstract: The aim of this work was to propose two different didactic experiments, which can be used in practical classes of analytical chemistry courses. More flexible experiments related to the theme, giving some options to the instructor are proposed. In this way, the Experiment 1 was divided in two parts. In the first one, the visualization of two distinct phases separation is emphasized: the rich and the poor phases in surfactant. In the second part, the metal pre-concentration (Co as example) is emphasized. The Experiment 2 has three different parts. In the first one, the complex formation is pointed out, in the second one, the pH influence is shown and in the last one, the influence of the complexation time is demonstrated.
Subject: separations
preconcentration
cloud point
atomic spectrometry
Editor: Sociedade Brasileira de Química
Rights: aberto
Identifier DOI: 10.1590/S0100-40422002000300023
Address: http://dx.doi.org/10.1590/S0100-40422002000300023
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422002000300023
Date Issue: 1-May-2002
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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