Organophosphorus reagents as extractants : Part 7-Liquid-liquid extraction of silver(I) and mercury(II) using tertiary phosphine chalcogenides

Abstract

Using the tertiary phosphine chalcogenides, triphenylphosphine oxide(Ph₃PO), triphenylphosphine sulphide(Ph₃PS) and 1,2-bis( diphenylphosphinyl)- ethane(dpeO₂), silver(l) and mercury(II), have been extracted from their binary mixtures with the di- and tri-valent metal ions, Cr(lll), Mn(II), Fe(III), Co(ll), Ni(II), Cu(II), Zn(II), Cd(II), Sn(ll), Pb(II), Mg(ll) and AI(III). With Ph₃PO and dpeO₂, Fe(III), Cu(II) and Zn(ll) interfere in the extraction of Ag(l) and Hg(II); however, there is no interference with Ph₃PS. Ag(l) interferes in the extraction of Hg(II) with all the reagents.