Synthesis of glycylcalix[6]arene and its applicability as resin for separation and preconcentration of trace transition metals

Abstract

A new glycylcalix[6]arene is synthesized by the reaction of glycine ethyl ester hydrochloride with acid chloride of <i style="">p</i>-carboxycalix[6]arene. Its physical properties, void volume, density, swelling, cation exchange capacity and t_1/2 have been determined. The glycylcalix[6]arene is used as resin and its metal ion exchange capacities are determined. Mn(II), Fe(II), Co(II), Cu(II), Ni(II) and Zn(II) were absorbed at 5.5, 4.5, 6.0, 4.0, 4.8 and 5.0 pH, respectively. These were eluted with NaF, H₂SO₄, acetic acid, tartrate and HCl_. The chromatographic separation of Mn(II), Fe(II) Co(II), Ni(II), Cu(II) and Zn(II) from each other was studied. These metals were preconcentrated on resin and determined in blood plasma and in the environment samples.