An ion chromatography system using chelating dye-coated columns for the determination of trace metals in high ionic strength media has been developed. A post-column spectrophotometric detection system was employed to investigate transition and alkaline earth metals. Initial investigations involved a study of the effect of eluent pH, with various metal ions, on different dyes and substrates. Later work concentrated on separation of metal ions using dye-coated high-performance substrates, and a comparison was made with a commercial chelating column. A number of metal ion separations in 1 mol dm-3 potassium nitrate have been achieved under isocratic and gradient conditions.
The following are summaries of seven of the papers and posters presented at a Meeting of the Analytical Division held on July gth-loth, 1997, in the University of Aberdeen. Summaries of twenty-two other papers and posters were published in the January and February issues, pp. 10 and 45.
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