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• W1969218639 endingPage "338" @default.
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• W1969218639 abstract "A newly reported chelating ligand, 9,10-phenanthraquinone ethylthiosemicarbazone (PET), has been used for selective separation of Pd(II) by solid phase extraction (SPE) and solvent extraction (SE) in highly acidic media. PET was chemically immobilized on aminopropylsilica gel, yielding PET-SG, and complexes of PET and PET-SG with Pd(II) were synthesized and confirmed by IR, UV, thermal and elemental analyses. Free PET forms a 1:1 complexwith Pd(II) in solution with a stability constant of 3.5 x 108 and ε of 2.5 x 105 dm-3 mol-1 cm-1 those were determined spectrophotometrically at 605 nm. PET-Pd(II) shows a superior stability in concentrated H2SO4, H3PO4, HNO3, HClO4 and glacial acetic acids for at least 24 h. It is easily and quantitatively extractable (%E = 99.6) in a one-stage process into MIBK from 10 mol/dm3 H2SO4. PET-SG has a Pd-uptake capacity of 0.31 mmol/g and found to be stable in saline liquors from pH 8 to 2 mol/dm3 H2SO4 or equivalent acidity of the studied acids. Leaching of >99.7% of Pd(II) was possible from 0.5 mol/dm3 H2SO4 without interferences except for thiosulphate and thiourea, so 0.5% thiourea in 1 mol/dm3 HCl was used as an eluent for stripping of Pd uptake in SPE and SE. SPE and SE techniques were applied for Pd(II) separation and preconcentration from various samples containing Pt(II;IV), Ag(I), Au(III) and Rh(III) followed by FAAS." @default.
• W1969218639 created "2016-06-24" @default.
• W1969218639 creator A5044578698 @default.
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• W1969218639 date "2010-04-01" @default.
• W1969218639 modified "2023-10-11" @default.
• W1969218639 title "Selective separation of palladium (II) from precious metal ions using thiosemicarbazone derivatives from acidic media by solid phase and solvent extractions" @default.
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• W1969218639 doi "https://doi.org/10.5004/dwt.2010.1059" @default.
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