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Type: Artigo de periódico
Title: Didactic experiments in analytical chemistry involving phase separations and preconcentration.
Author: Nascentes, CC
Arruda, MAZ
Maniasso, N
Abstract: DIDACTIC EXPERIMENTS IN ANALYTICAL CHEMISTRY INVOLVING PHASE SEPARATIONS AND PRECONCENTRATION. 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
cloud point
atomic spectrometry
Country: Brasil
Editor: Soc Brasileira Quimica
Citation: Quimica Nova. Soc Brasileira Quimica, v. 25, n. 3, n. 483, n. 489, 2002.
Rights: aberto
Identifier DOI: 10.1590/S0100-40422002000300023
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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