Capillary electrophoresis with UV detection, on-line stacking and off-line dispersive liquid–liquid microextraction for determination of verapamil enantiomers in plasma

Abstract

A rapid and reliable dispersive liquid–liquid microextraction (DLLME) method was coupled with field-amplified sample injection (FASI) in capillary electrophoresis with a diode array detector for the quantification of verapamil enantiomers in human plasma samples.