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Chelate formation of N-(o-hydroxybenzyl)iminodiacetic acid with rare earth elements

J. Majer, L. Sirotková, and I. Valášková

Department of Analytical Chemistry, Faculty of Pharmacy, Komenský University, CS-832 32 Bratislava


Abstract:  In the framework of systematic study of chelate formation with rare earth elements the N-(o-hydroxybenzyl)iminodiacetic acid was selected as a Iigand suitable for chelation with M(III) ions. The study was performed by Potentiometrie method and by paper electrophoresis. The stability constants of complexes of ML, MHL, and ML2 type, respectively, were evaluated from neutralization curves measured at Ic=0.10 moIdm-3 (KN03) and T=293.2 K. The paper electrophoresis served for investigation of chelates formed in dependence on acidity and the charge of particles. The ionization constants of N-(o-hydroxybenzyI)iminodiacetic acid were determined by Potentiometrie method except the last one pKa3 being determined spectrophotometrically.

Full paper in Portable Document Format: 372a183.pdf


Chemical Papers 37 (2) 183–189 (1983)

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