Тип публикации: статья из журнала
Год издания: 2020
Идентификатор DOI: 10.17721/moca.2020.53-65
Ключевые слова: Adsorption-photometric determination, Complexing adsorbents, precious metals, silica gels
Аннотация: The synthesis of new complexing adsorbents with thiophenol (MPhS) and aminobenzthiazolpropyl (ABTS) groups grafted onto the surface of silica gels are considered. The extraction of precious metals (Au(III), Ag(I), Pd(II), Pt(II,IV), Rh(III), Ir(IV), Ru(IV), Os(IV)) from solutions of hydrochloric acid by MPhS and ABTS adsorbents. CoПоказать полностьюntact time, acidity, temperature (25– 95 °C), and the presence of a labilization agent tin(II) chloride is examined. It is shown that the adsorption properties of MPhS for precious metals are better than ABTS. It was proved by luminescence spectroscopy that gold, silver and platinum in the surface complexes with sulfur-containing groups are in lower oxidation states; and by the EPR method it was proved that ruthenium and osmium in surface complexes are in oxidation state +3. The formation of luminescent Ag(I), Au(I) and Pt(II) complexes on the surface of the MPhS, colored Ru(III) complexes on the surface of MPhS and ABTS, and mixed-ligand complexes of Pt(II) with surface aminobenzthiazole groups and Michler’s thioketone were used for developing methods of their adsorption-luminescent, adsorption-photometric and test determination.
Журнал: Methods and Objects of Chemical Analysis
Выпуск журнала: Т. 15, № 2
Номера страниц: 53-65
ISSN журнала: 19910290
Место издания: Киев