Micro amounts of Pb(II), Zn(II), Cd(II) and Hg(II) ions in aqueous solutions can be quantitatively measured using the x-ray fluorescence spectroscopy after preconcentration by silica with grafted 8-hydroxy quinoline and 4-(2-pyridylazo)resorcinol. Mutual influence of other toxic metal on characteristic line intensities of determined ion should be taken into consideration when analyzing multicomponent systems.

Silica gels with supported polyionene was shown to have satisfactory adsorption properties in respect to such metal-containing anions as Mo(VI), W(VI) and Cr(VI). The adsorbent practically quantitatively extracts Mo(VI) and Cr(VI) ions at pH from 2 to 4 and W(VI) at pH > 4 in the static adsorption mode. Obtained non-swelling adsorbent possesses good kinetic characteristics (all studied anions were extracted for 10 min) and has high adsorption capacity towards metal-containing anions.


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