Use of different salt solutions in salting-out TLC of Co(III) complexes on silica gel
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Saturated aqueous solutions of 28 different salts have been studied as a potential mobile phases for salting-out thin-layer chromatography, on silica gel, of a series of four mixed bis-aminocarboxylato cobalt(III) complexes. In addition, by linear regression analysis of chromatographic data obtained for fifteen mixed aminocarboxylato Co(III) complexes (four series) with solutions of ammonium chloride, three alkali metal chlorides, and four alkaline earth metal chlorides, four linear dependences previously established on different adsorbents with (NH4)(2)SO4 solutions were confirmed. The qualities of the separations achieved with the salts were compared and Li+, Mg2+, and Ca2+ chlorides are proposed as the most suitable.
Keywords:salting-out thin-layer chromatography / application of different salts / salting-out ability / silica gel / mixed aminocarboxylato Co(III) complexes
Source:Chromatographia, 2008, 67, 3-4, 259-267
- Vieweg, Wiesbaden