Preconcentration and determination of precious metals using silica gel chemically modified with products of interaction of o-or p-aminotiophenols with γ-(Trietoxisilane)propylisocyanate : научное издание | Научно-инновационный портал СФУ

Preconcentration and determination of precious metals using silica gel chemically modified with products of interaction of o-or p-aminotiophenols with γ-(Trietoxisilane)propylisocyanate : научное издание

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. Contact 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.

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Издание

Журнал: Methods and Objects of Chemical Analysis

Выпуск журнала: Т. 15, 2

Номера страниц: 53-65

ISSN журнала: 19910290

Место издания: Киев

Авторы

  • Trofimchuk A.K. (Taras Shevchenko National university of Kyiv)
  • Losev V.N. (Scientific research engineering centre,“Kristall” Siberian Feder,al University)
  • Parfenova V.V. (Scientific research engineering centre,“Kristall” Siberian Feder,al University)
  • Elsuf'ev E.V. (Scientific research engineering centre,“Kristall” Siberian Feder,al University)
  • Gudymа N.V. (F.D. Ovcharenko institute of Biocolloid Chemistry,NAS of Ukraine)

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