Advanced liquid and solid extraction procedures for ultratrace determination of rhenium by radiochemical neutron activation analysis

Abstract

Radiochemical neutron activation analysis (RNAA) procedures for determination of Re at the ultratrace level based on use of liquid-liquid extraction (LLE) and extraction chromatography (EXC) have been developed. Two different LLE procedures were used depending on the way of sample decomposition using either 2-butanone or tetraphenylarsonium chloride in CHCl 3 . EXC employed new solid extractant materials prepared by incorporation of the liquid trioctyl-methylammonium chloride into an inert polyacrylonitrile matrix. The RNAA procedures presented have been compared and applied for Re determination in several biological and environmental reference materials.