Complexes of azelaic and diethylenetrioxydiacetic acids with Na+, Mg2+, and Ca2+ in NaCl aqueous solutions, at 25 degrees C

Authors
De Stefano, C Gianguzza, A Piazzese, D
Citation
C. De Stefano et al., Complexes of azelaic and diethylenetrioxydiacetic acids with Na+, Mg2+, and Ca2+ in NaCl aqueous solutions, at 25 degrees C, J CHEM EN D, 45(1), 2000, pp. 15-19
Citations number
22
Categorie Soggetti
Chemistry,"Chemical Engineering
Journal title
JOURNAL OF CHEMICAL AND ENGINEERING DATA
ISSN journal
00219568 → ACNP
Volume
45
Issue
1
Year of publication
2000
Pages
15 - 19
Database
ISI
SICI code
0021-9568(200001/02)45:1<15:COAADA>2.0.ZU;2-J
Abstract
Formation constants of Na+, Mg2+, and Ca2+ complexes of azelaic and diethyl enetrioxydiacetic acids have been determined by potentiometry (H+ --glass e lectrode) at different ionic strengths (0 less than or equal to I less than or equal to 1 mol dm(-3)), at t = 25 degrees C. For all the systems the sp ecies ML and MHL have been found. The relative formation constants are repo rted together with the parameters for the dependence on ionic Strength. Res ults are discussed in comparison with those for other carboxylic ligands. S peciation problems are considered also.