The addition of tartaric acid to aqueous nitrate solutions containing Fe(III) produces an increase in the solvent extraction of Fe(III) by di(2-ethyl hexyl)phosphoric acid, DEHPA, in hexane solutions. This effect has been studied and it is explained in terms of chemical equilibrium between the two liquid phases by applying the following reactions: [formula omitted]; eq. const. logβ=7.18±0.03 and [formula omitted]. Here, HA stands for DEHPA and L represents tartaric acid. Such behavior determines the formation of a FeLA(HA) metal complex species of mixed ligand composition in the organic phase. © 1990, The Japan Society for Analytical Chemistry. All rights reserved.
|Publication status||Published - 1 Jan 1990|
- di(2-ethyl hexyl)phosphoric acid
- radiotracer determination
- solvent extraction
- synergistic effect
- tartaric acid