Polarographic study of the coordinated system Zn(II)-glycine-glycinate ion

A polarographic method has been applied to the study of the mixed-ligand system Zn(II)-glycine-glycinate, in aqueous medium, at I= 1.0 M (NaClO 4) and 25 ± 0.05 °C. The study of the quasi-reversible waves characteristic of Zn(II) has been carried out by means of a new method of analysis proposed by...

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Bibliographic Details
Published in:Talanta (Oxford) 1996-07, Vol.43 (7), p.1081-1089
Main Authors: Cuesta Sánchez, Mariana, de la Cuesta González, Manuel, Carlos Ruiz Morales, Juan, César Rodríguez Placeres, Jesús
Format: Article
Language:English
Subjects:
Chemistry
Coordination compounds
Exact sciences and technology
Glycinate
Glycine
Inorganic chemistry and origins of life
Polarography
Preparations and properties
Zinc
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Summary:A polarographic method has been applied to the study of the mixed-ligand system Zn(II)-glycine-glycinate, in aqueous medium, at I= 1.0 M (NaClO 4) and 25 ± 0.05 °C. The study of the quasi-reversible waves characteristic of Zn(II) has been carried out by means of a new method of analysis proposed by the authors, which is faster and more accurate than the traditional methods. The stabilization of the coordinated species [ZnG] 2+ ( β 10 = 2.0), [ZnG 2] 2+ ( β 20 = 0.71), (Zn(G −)] + ( β 01 = 7.6 × 10 4). [Zn(G −) 2] ( β 02= 4.0 × 10 9) and [ZnG(G −)] + ( β 11 = 1.7 × 10 5) has been established.
ISSN:0039-9140
1873-3573
DOI:10.1016/0039-9140(96)01865-6