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A pH- and Redox-Potentiometric Study of Equilibria between Fe(II), Fe(III), and N-(Carboxymethyl)Aspartic Acid

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Abstract

Complexation in the Fe2+–Fe3+–N-(carboxymethyl)aspartic acid (H3L) system in aqueous solutions was studied by pH- and redox-potentiometric titration at 25°C and at an ionic strength of 0.1 (KCl). Depending on the H3L concentration and pH, neutral, protonated, and hydroxo complexes of iron(III) can be formed in the solutions. The stability constants for all the detected complexes were calculated, and the distribution plots for the fractions of complexes vs. the solution pH were constructed.

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Authors and Affiliations

  1. Tver State University, Sadovyi per. 35, Tver

    N. E. Knyazeva, V. M. Nikol'skii & I. P. Gorelov

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  1. N. E. Knyazeva
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  2. V. M. Nikol'skii
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  3. I. P. Gorelov
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Knyazeva, N.E., Nikol'skii, V.M. & Gorelov, I.P. A pH- and Redox-Potentiometric Study of Equilibria between Fe(II), Fe(III), and N-(Carboxymethyl)Aspartic Acid. Russian Journal of Coordination Chemistry 28, 127–131 (2002). https://doi.org/10.1023/A:1014236202268

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  • DOI: https://doi.org/10.1023/A:1014236202268

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