Potentiometric titrations of metal ions in acetonitrile with polyamine ligands.
Ethylenediamine, diethylenetriamine, and triethylenetetramine were investigated as titrants for metal ions in acetonitrile. Copper(II) gave the best titration plots; cobalt(II), manganese(II), nickel(II), iron(III) and magnesium(II) also gave results acceptable for analytical determinations. Platinum, silver-silver(I), mercury-mercury(II), carbon, and a copper ion-selective electrode were studied as indicating electrode systems; of these platinum gave the sharpest and largest inflections. The mechanism by which platinum responds as an indicating electrode in these complexation titrations is unclear.
Al-Daher
I M
IM
Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada.
Kratochvil
B
B