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Didactic experiments employing a flow injection system

By Fábio Rodrigo Piovezani Rocha, Patrícia Benedini Martelli and Boaventura Freire dos Reis

Abstract

Didactic experiments are proposed in order to demonstrate the characteristics of flow injection analysis and to extend the applications of FIA to the determination of physical chemistry parameters in undergraduate labs. All experiments can be performed with the same flow manifold by employing usual FIA devices. Analytical characteristics are presented by means of the determination of iron in river water, employing 1,10-phenantroline as chromogenic reagent. Physical chemistry applications were the determination of reaction stoichiometries by continuous variation and mole-ratio methods and the evaluation of the pH and ionic strength effects on the kinetic of the reduction of hexacianoferrate(III) by ascorbic acid

Topics: flow injection analysis, spectrophotometry, kinetics, stoichiometry
Publisher: Sociedade Brasileira de Química
Year: 2000
OAI identifier: oai:scielo:S0100-40422000000100022
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