Conductometric titration of metal-Cupferron chelate with EDTA in nonaqueous media

A ligand substitution reaction between EDTA and the metal-Cupfferon chelates and its analyical application were investigated in N, N-dimethylformamide (DMF) and hexamethylphosphoric triamide (HMPA). The metal-Cupferron chelates used were those of aluminium(III), cobalt(II), copper(II), iron(III), ni...

Full description

Saved in:
Bibliographic Details
Published inBUNSEKI KAGAKU Vol. 38; no. 6; pp. 267 - 271
Main Authors YAGITA, Yoshinobu, YOSHIMURA, Chozo
Format Journal Article
LanguageJapanese
Published The Japan Society for Analytical Chemistry 05.06.1989
Subjects
conductometric titration
EDTA
metal-Cupferron chelate
nonaqueous solvent
Online AccessGet full text
ISSN0525-1931
DOI10.2116/bunsekikagaku.38.6_267

Cover

More Information
Summary:A ligand substitution reaction between EDTA and the metal-Cupfferon chelates and its analyical application were investigated in N, N-dimethylformamide (DMF) and hexamethylphosphoric triamide (HMPA). The metal-Cupferron chelates used were those of aluminium(III), cobalt(II), copper(II), iron(III), nickel(II), titanium(IV) and zirconium(IV). The molar ratios of 2 : 1 and 1 : 1 were obtained by conductometric titration of metal-Cupferron chelates with EDTA. Differential titration of the mixed metal-Cupferron chelates could be carried out by utilizing the difference in their reactivities. Less than 5% of water, inorganic acids and organic solvents such as chloroform, carbon tetrachloride and MIBK did not influence the inflection points in the conductometric titration curves. The lowest limit of determination was 3×10-3 mol/dm3.
ISSN:0525-1931
DOI:10.2116/bunsekikagaku.38.6_267