Abstract
In the ligand-exchange gas chromatographic separation of lower aliphatic amines developed, an inorganic cation exchanger (zirconium phosphate) in the Cu 2+ form is used as the stationary phase, and the mobile phase is nitrogen gas containing ammonia and water vapour. By studying the effects of the structures of the amines, the cation of the stationary phase and the composition of the mobile phase on the retention values, it has been found that the amine-stationary phase interaction is correlated with the stability of the complexes formed and with steric effects on the amine-metal ion reaction. The concentration of ammonia in the mobile phase also plays an important part in determining retention times and peak resolution.
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