ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

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 I_c=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 pK_a3 being determined spectrophotometrically.

Full paper in Portable Document Format: 372a183.pdf

Chemical Papers 37 (2) 183–189 (1983)