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Abstract
When countercurrent chromatography (CCC) is used for the separation of inorganic solutes, the retention volume may be different with the predicted one, and the separation efficiency is lower than that for organic separation. These discrepancies are illustrated by expressions of the retention volume and the height of theoretical plate from a mass transfer model, which is established in the present research.
The theoretical results show that the existence of chemical reactions plays a great role in the retention and the separation efficiency of CCC; a fast extraction reaction is preferable in the separation of inorganic solutes, and promoting the reaction rate can also improve the separation efficiency. CCC might be explored as a technique to measure kinetic data of extraction reactions.