Complexometric titrations of calcium and magnesium in limestone
DOI:
https://doi.org/10.5902/2179460X24935Abstract
The calcium and magnesium amounts determined in limestones. This alkaline earths are stable complexes, with sodium salt of the ethylenediamintetraacetic acid. If the pH is controled, there is seletivity in the complexation and separations of such elements. The indicators used are the black eriochrom T for magnesium, and the calcon for calcium.
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GUENTHER, W.B., Química Quantitativa, Medições e Equilíbrios, Edgard Blücher Ltda, São Paulo, 1972, pp. 384.
MERCK, E., Métodos complexométricos de titulação com titriplex, Darmstadt, Alemanha, 2ªed, 1964, pp. 21,33,34,47.
SCHWARZENBACH, G., Analytica Chem. Acta., 7, 141 (1952).
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