A Polarographic Study of the Complex Formation Equilibria of the Lead(II) Ion with Aspartic and Iminodiacetic Acids

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概要

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• In this experiment, we studied the complex formation equilibria of the lead(II) ion with aspartic acid and iminodiacetic acid by using the polarographic method. In acetate buffer solutions (5.80>pH>3.70), the lead(II) ion forms one normal complex, PbX<SUP>0</SUP>, and two mixed ligand complexes involving the acetate ion, PbX(Ac)<SUP>−</SUP>and PbX(Ac)<SUB>2</SUB><SUP>2−</SUP>, with aspartic acid. On the other hand, with iminodiacetic acid, it forms a normal complex, PbX<SUP>0</SUP>, and only one mixed ligand complex, PbX(Ac)<SUP>−</SUP>. By observing the effects of the concentrations of the hydrogen ion, the acetate ion, and aspartic acid or iminodiacetic acid on the half-wave potential of the lead(II) ion, their formation constants were determined to be as follows:<BR>(<U>Remark: Graphics omitted.</U>)

• 公益社団法人 日本化学会の論文

著者

• Kodama Mutsuo

  Department Of Chemistry College Of General Education Hirosaki University

• Takahashi Sozo

  Department of Chemistry, Ibaraki Technical College

• Takahashi Sozo

  Department of Chemistry, Ibaraki University

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