Abstract
The complex formation reaction between La(III), Gd(III), and Yb(III) with Arsenazo III, Arsenazo M, and Chlorophosphonazo III after adsorption on polyacrylonitrile fiber loaded with an ion exchanger with iminodiacetate groups Chelex 100 has been studied. The influence of medium acidity, duration of the contact of the solution with the adsorbent, the presence of masking agents, and the concentrations of ions on the analytical signals of complexes in the solid phase has been investigated. It has been shown that there is a possibility to perform sorption-spectroscopic determination of the total concentration of the indicated elements using Chlorophosphonazo and the sum of lanthanum and gadolinium with Arsenazo M after adsorption from malonic acid solutions.
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