Solution equilibria between ethylenediamine-N,N'-di-3-propionate and some transition metal(II) ions.
Talanta
; 49(2): 473-82, 1999 Jun 14.
Article
em En
| MEDLINE
| ID: mdl-18967621
ABSTRACT
Solution equilibria between the ligand ethylenediamine-N,N'-di-3-propionate (eddp(2-)) and copper(II), nickel(II) or cobalt(II) ions were studied by glass electrode pH-metric and spectrophotometric measurements in 0.1 M NaCl ionic medium at 298.0+/-0.2 K. In the concentration limits 1.0=[metal(II)]=5.0, 1.0=[eddp]=10.0 and 2.5=-log[H(+)]=10.0 mM, the formation of the following complexes with their overall stability constants, log(beta+/-sigma), was proved by the non-linear least-squares data treatment Cu(eddp), 14.23+/-0.04; Cu(Heddp), 16.17+/-0.08; Cu(OH)eddp, 3.08+/-0.06; Ni(eddp), 8.89+/-0.02; Ni(OH)eddp, -2.15+/-0.06; Co(eddp), 7.16+/-0.03; Co(OH)eddp, -0.83+/-0.04; Co(OH)(2)eddp, -10.54+/-0.05. The mechanism of the formation and structure of the complexes, as well as their possible analytical use, were discussed.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Talanta
Ano de publicação:
1999
Tipo de documento:
Article
País de afiliação:
Iugoslávia