Simple and efficient method for enantioselective determination of omeprazole in human plasma

摘要

A Practical and selective HPLC method for the separation and quantification of omeprazole enantiomers in human plasma is presented. C_(18) solid phase extraction (SPE) cartridges were used to extract the enantiomers from plasma samples and the chiral separation was carried out on a Chiralpak AD column protected with a CN guard column, using ethanol: hexane (70:30) at the mobile phase, at a flow rate of 0.5 ml/min. The detection was carried out at 302 nm. The method proved to be linear in the range of 10-1000 ng/ml for each enantiomer, with a quantification limit of 5 ng/ml. Precision and accuracy, demonstrated by within-day and between-day assays, were lower than 10%.