Organophosphorous reagents as extractants: Part 5 Synergic effect of triphenylphosphine oxide on the extraction of iron (III) using 4- phenyl-2, 4- butanedione

Abstract

Fe (III) separated quantitatively from its binary mixtures with Cr(III), Mn(II), Co(II), Ni(II), Zn(II), Hg (III), Mg(II) and from steel samples using a synergic combination of 4-phenyl-2,4-butanedione(HA) with triphenylphosphine oxide(Ph₃PO). However, copper (II) and silve (I) interfere. The extraction and stability constants of the synergic species Fe(NCS)A₂Ph₃Po) are found to be:1.2 <img src='/image/spc_char/cross.gif' border=0> 10⁹ and 7.3 <img src='/image/spc_char/cross.gif' border=0> 10⁴ respectively.