Chiral separation of pemoline enantiomers by cyclodextrin-modified micellar capillary chromatography.

Micellar electrokinetic chromatography (MEKC) was successfully applied to the chiral separation with the addition of cyclodextrins (CDs) as chiral selector to running buffer. Chiral separation depended on the type of CDs. Mono-3-O-phenylcarbamoyl-beta-CD was effective for the chiral separation of pemoline. We investigated the type and concentration of CD and other parameters such as buffer pH, the concentration of SDS and the effect of organic modifier. The conditions for enantiomeric separation of pemoline were as follows: 40 mmol/l borate buffer at pH 9.0 with 40 mmol/l SDS, 20 mmol/l mono-3-O-phenylcarbamoyl-beta-CD and 10% 2-propanol. Baseline separation (Rs=2.21) of pemoline can be achieved.