On-line aluminium pre-concentration and its application to the determination of the metal in dialysis concentrates by atomic spectrometric methods

Abstract

Cation and anion exchangers (Dowex 50W-X2 and Amberlite IRA-400), Chelex 100 and a synthetic chelating resin (Kelex 100 adsorbed on Amberlite XAD-7) were packed in a minicolumn inserted in a flow injection pre-concentration manifold with the aim of determining aluminium in the µg l–1 range in dialysis concentrates by atomic absorption and/or inductively coupled plasma atomic emission spectrometry. The optimisation of the operating conditions for the pre-concentration of aluminium has been studied for each of the investigated resins. The selection of appropriate solid phases and their successful application to the determination of aluminium in dialysis concentrates, samples with a high salt content, are discussed.