Comparative study of metallochromic indicators for magnesium
ANALYSTANALYST Pub Date: DOI: 10.1039/AN9871201723
Abstract
The performances of common metallochromic indicators for the complexometric titration of Mg were evaluated by comparing the results obtained in titration with EDTA, using the following indicators: Methylthymol Blue, Eriochrome Black T, Metalphthalein, Thymolphthalein Complexone, Pyrocatechol Violet, Eriochrome Blue-Black B, Calmagite, Antipyryl-p-Arsenazo I and Antipyryl-o-Arsenazo l. Tristimulus colorimetry theory was applied to the chromatic transitions of the indicators. As a result, Eriochrome Black T and Antipyryl-o-Arsenazo I are proposed as being the most suitable indicators for the complexometric titration of Mg with EDTA.
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Journal Name：ANALYSTANALYST
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CAS no.: 89640-58-4
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