Evaluation of stability constants of metal complexes with sulphonated azo-ligands.
An ion-exchange procedure is described for the determination of the stability constants for cadmium, copper, nickel and manganese complexes with three sulphonated azo ligands: calmagite, alizarin violet N and palatine chrome black. The results, log K values, show a good agreement with those obtained by a spectrophotometric technique.
Abollino
O
O
Department of Analytical Chemistry, University of Torino, Via P. Giuria n. 5, 10125 Torino, Italy.
Sarzanini
C
C
Mentasti
E
E
Liberatori
A
A