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Complexometric titration with potenciometric indicator to determination of calcium and magnesium in soil extracts¹

By Claudia Mara Pereira, Cristhiane Anete Neiverth, Shizuo Maeda, Marcela Guiotoku and Luziane Franciscon


This study proposes a method of direct and simultaneous determination of the amount of Ca2+ and Mg2+ present in soil extracts using a Calcium Ion-Selective Electrode and by Complexometric Titration (ISE-CT). The results were compared to those obtained by conventional analytical techniques of Complexometric Titration (CT) and Flame Atomic Absorption Spectrometry (FAAS). There were no significant differences in the determination of Ca2+ and Mg2+ in comparison with CT and FAAS, at a 95 % confidence level. Additionally, results of this method were more precise and accurate than of the Interlaboratorial Control (IC)

Topics: eletrodo íon seletivo, titulador automático, potenciometria, Plant culture, SB1-1110, Agriculture, S, Agriculture (General), S1-972
Publisher: Sociedade Brasileira de Ciência do Solo
Year: 2011
DOI identifier: 10.1590/S0100-06832011000400027
OAI identifier: oai:doaj.org/article:48ffde79f8634e4e9aeb5dbb36ce45e5
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