Further Results on Behaviors of Rare Earth Metal Ions in Centrifugal Partition Chromatography with DI(2-Ethylhexyl) Phosphoric Acid
- 1 September 1988
- journal article
- Published by Taylor & Francis in Journal of Liquid Chromatography
- Vol. 11 (12) , 2473-2485
- https://doi.org/10.1080/01483918808076741
Abstract
In centrifugal partition chromatography (CPC) of rare earth metal ions (RECl3) by the use of di(2-ethyl-hexyl)phosphate (D2EHPA) as “separator” in the stationary phase, effects of number of microcells and stationary solvent were investigated for improving separation. By increasing the number of microcells from 1200 (3 cartridges) to 2400 (6 cartridges), the peak resolution value (R) for the separation of PrCl3 versus NdCl3 was improved from 0.37 to 0.62. Heavier RE ions (ErCl3 and YbCl3) was able to separate almost completely by using CHCl3 as stationary solvent. This result suggests that by adjusting these two factors, in addition to adjusting [HC1] in the mobile phase (previously reported), almost whole series of adjacent couples of RE ions will be effectively separated by CPC with acidic D2EHPA. In contrast, neutral tri-n-butyl phosphate (TBP) was found to be a poor separator.Keywords
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