Experimentos didáticos utilizando sistema de análise por injeção em fluxo

Química Nova

Fábio Rodrigo Piovezani Rocha²  Patrícia Benedini Martelli¹  Boaventura Freire Dos Reis¹ 

[1] ,Universidade Federal de São Carlos Departamento de Química São Carlos SP

关键词: flow injection analysis;    spectrophotometry;    kinetics;    stoichiometry;   

DOI  :  10.1590/S0100-40422000000100022

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY-NC   
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