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Abstract
The separation of yttrium and chemically-similar heavy lanthanoids has been studied by countercurrent chromatography (CCC) equipped with a multilayer coiled column containing a toluene solution of 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester as a stationary phase. The retention of the stationary phase in a coiled tubing was enhanced with increasing revolutional speed and with decreasing flow rate of the mobile phase. This high retention of the stationary phase improved the peak resolution. The mutual separation of rare earths with low separation factors was satisfactorily accomplished with good resolution through a single step of CCC.
