Solvent extraction equilibria of the nickel-3-(2-furyl)-2-mercaptopropenoic acid complex as an ion-pair with the diphenylguanidinium ion.
The extraction of nickel from aqueous media (0.1M NaClO(4)) with 3-(2-furyl)-2-mercaptopropenoic acid (FMPA) in dichloroethane at 25 degrees has been studied. The extraction is efficient only if a suitable counter-ion is present to form an ion-associate with the Ni-FMPA complex. The diphenylguanidinium ion has been found suitable as the counter-ion.
Izquierdo
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Department of Analytical Chemistry, Faculty of Chemistry, University of Barcelona, Barcelona, Spain.
Prat
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MD
Garbayo
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