Original scientific paper

Extraction and Separation of Germanium(IV) with 4-Pyridone Derivatives

Vlasta Vojković ; Laboratory of Analytical Chemistry, Faculty of Science, University of Zagreb, Strossmayerov trg 14, 10000 Zagreb, Croatia
Iva Juranović ; Laboratory of Analytical Chemistry, Faculty of Science, University of Zagreb, Strossmayerov trg 14, 10000 Zagreb, Croatia
Biserka Tamhina ; Laboratory of Analytical Chemistry, Faculty of Science, University of Zagreb, Strossmayerov trg 14, 10000 Zagreb, Croatia

Abstract

Extraction of germanium(IV) from aqueous hydrochloric, sulphuric and phosphoric acid Solutions with 3-hydroxy-2-methyl-1-phenyl-4-pyridone (HX) and 3-hydroxy-2-methyl-1-(4-tolyl)-4-pyridone (HY) dissolved in chloroform was studied. Extraction with HX took place in the acidity range 1-3 M H₂SO₄ or 0.5-9.5 M HCl and that with HY in the range 0.5-5 M H₂SO₄ or 0.2-9.5 M HCl. Separation of germanium(IV) from a large excess of zinc(II), arsenic(III) and gallium(III) by extraction with HX and HY was simple and fast. Formation of a GeIV-HX(HY) complex from sulphuric acid solution was applicable for spectrophotometric determination of germanium(IV) in the organic phase at the maximum absorption at 299 nm. Extraction of germanium(IV) with chloroform, in the absence of HX or HY, from hydrochloric and sulphuric acid Solutions, in dependence on acid concentration and on addition of lithium chloride, was also studied.

Keywords

germanium; 4-pyridone derivatives; extraction; separation; zinc; arsenic; gallium; spectrophotometric determination

Hrčak ID:

131836

URI

https://hrcak.srce.hr/131836

Publication date:

2.4.2001.

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