Thin-layer chromatographic separation of noble metals on ECTEOLA-cellulose in hydrochloric acid and aqueous chloride solutions

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The thin-layer chromatographic behaviour of the noble metals on ECTEOLA-cellulose has been examined in HCl and aqueous chloride solutions of Li, Na, Mg, Ca, Sr and Al. The Rf-values decrease in the order Ir(III) ≥ Rh(III) > Ru(III) > Pd(II) > Pt(IV) > Ir(IV) > Au(III) in all of the media of higher chloride concentrations (3M to 5M), in which there are sufficiently large differences in Rf-values of adjacent metals to resolve them clearly. Especially, the HCl solutions with or without H2O2 are very suitable for multi-component separations of the noble metals.

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