Enantiomer Separations by Capillary Electrophoresis

Area of Science:

• Analytical Chemistry
• Separation Science

Background:

• Capillary electrophoresis (CE) is a powerful technique for separating enantiomers.
• The method's flexibility stems from diverse chiral selectors and operational modes like electrokinetic chromatography.

Purpose of the Study:

• To review the fundamentals of CE enantioseparations.
• To discuss commonly used chiral selectors and separation modes.
• To provide a practical example of enantiomer separation.

Main Methods:

• Overview of capillary electrophoresis principles for enantioseparation.
• Discussion of various chiral selectors and their role as pseudostationary phases.
• Illustrative example using native and charged cyclodextrin derivatives.

Main Results:

• Capillary electrophoresis offers a wide array of chiral selectors and operational modes for enantioseparation.
• Chiral selectors, when added to the background electrolyte, function as pseudostationary phases with unique electrophoretic mobility.
• Successful separation of a positively charged analyte's enantiomers was demonstrated using cyclodextrin derivatives.

Conclusions:

• Capillary electrophoresis is a highly adaptable technique for analytical enantioseparations.
• The choice of chiral selector and operational mode significantly influences separation efficiency.
• Cyclodextrin derivatives are effective chiral selectors for CE-based enantiomer resolution.