Sorbent extraction of copper, lead, nickel and cadmium ions in dialysis concentrates before their atomic absorption spectrometric determinations

Abstract

In the present study, the atomic absorption spectrometric determinations of copper, lead, nickel and cadmium in dialysis concentrates have been performed after preconcentration and separation on a column filled with XAD-4 resin. The procedure is based on chelate formation of the investigated metals with sodium diethyl dithiocarbamate (Na-DTDC) and recovery of the chelates from the column with acetone. The relative standard deviations (RSD) for the determinations were found to be lower than 10%. Matrix effects of dialysis solution for preconcentration procedure were examined. The recoveries for the analytes under the optimum working conditions were higher than 95%.