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EDTA salt modified carbon paste electrode for square wave voltammetric determination of theophylline in

Amsalu Moges1, Mulugeta Dawit2, Mahilet Turbale3

  • 1Debre Markos University, Debre Markos, Ethiopia.

Plos One
|June 10, 2022
PubMed

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Different methods, such as visual observance of metal-ion indicators, spectroscopic techniques, and potentiometric methods, can determine the endpoint of an EDTA titration.
In the visual method, metal-ion indicators (metallochromic dyes), which have distinct colors in their free and complex forms, are added to the mixture to signal the titration's end point. They form stable complexes with metal ions, but these complexes are weaker than the corresponding metal–EDTA complexes. As a...
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