A Novel Quantitative Separation of Cr(III) from Numerous Metal Ions on β-Stannic Arsenate Thin Layers in DMSO—HCI Systems

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Abstract
This paper deals with the thin-layer chromatography of metal ions on β-stannic arsenate using dimethylsulfoxide solvent system. A novel quantitative separation of Cr(III) has been developed on these thin layers. The method is precise and accurate and can be applied for the quantitative separation of Cr(III) from mixtures containing Cu, Nb, Ta, Ce, Ni, Co, Al, Zn, Mn, Th, La, Cd, and Pt. A mechanism dealing with this separation is also been presented based on the kinetic inertness of Cr(III), the properties of DMSO, and the selectivity of β-stannic arsenate.