Selection of the sample composition for the selective preconcentration of some platinum group metal ions by Donnan dialysis |
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Authors: | Krystyna Brajter Krystyna Słonawska |
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Affiliation: | (1) Department of Chemistry, Warsaw University, Pasteura 1, PL-02-093 Warsaw, Poland |
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Abstract: | The possibility of selective preconcentration of platinum group metal ions by Donnan dialysis was investigated. The effect of sample matrix (glycine) on self diffusion of the following platinum group metal ions Pt(IV), Pd(II), Rh(III), Ir(III) and Ir(IV) was determined. To separate a sample from the receiver electrolyte (0.5M NH4Cl), anion or cation-exchange membrane were used. Excellent selective preconcentration of Pd(II) in the sample and Ir(III) in the receiver solution was achieved. Experiments performed enable to draw some conclusion on the charge sign of glycinepalladium complexes. |
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Keywords: | Donnan dialysis cation and anion-exchange membranes platinum group metals atomic absorption spectrometry |
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