Abstract
Thin-layer ligand-exchange chromatography with sodium, magnesium, aluminium, calcium, chromium(III), iron(III), nickel, copper(II), zinc, strontium, cadmium, and barium as the central atoms has been investigated. With copper(II) as the central atom, the method is a simple, inexpensive, and speedy means of resolution of mixtures of carbohydrates not easily achieved by other methods. The molar ratios of complexed to uncomplexed polyhydroxy compounds, which give an indication of the relative stabilities of the complexes, are calculated from the chromatographic migration rates. For a particular compound, this ratio is, in general, greatest for the complex with the copper(II) ion.
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