AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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STUDIA CHEMIA - Ediţia nr.4 din 2007 | |||||||
Articol: |
TLC SEPARATION OF TH(IV) AND LANTHANIDES(III) ON VARIOUS STATIONARY PHASES USING HDEHDTP AS COMPLEXING AGENT. Autori: MARIA-LOREDANA SORAN, MARIA CURTUI, DIANA GHERMAN. |
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Rezumat: The separation of thorium(IV) and lanthanides(III) (Ln(III)) using different stationary phases: silica gel, silica gel – zirconium(IV) silicate mixture, silica gel – titanium(IV) silicate mixture, and silica gel impregnated with NH4NO3 2.5M has been investigated. The solvent mixtures o,m,p-xylene – methyl-ethyl-ketone (MEK) - N,N-dimethylformamide (DMF) (16+ 2+1, v/v) and methyl-ethyl-ketone – tetrahydrofuran (THF) (6.8+3.2, v/v) containing di(2-ethylhexyl)dithiophosphoric acid (HDEHDTP) 0.04 M as complexing agent were used as mobile phases. The results obtained show that the separation of Th(IV) from Ln(III) and Ln(III) from each other is achieved using silica gel impregnated with NH4NO3 2.5 M and MEK – THF (6.8+3.2, v/v) – HDEHDTP 0.04 M as mobile phase. | |||||||