title: Development of HPLC method for the determination of levosulpiride in human plasma.
abstract: A rapid and simple high performance liquid chromatography (HPLC) method was developed and validated for determination of levosulpiride in human plasma. After extraction with ethylacetate/methylene chloride (5:1, v/v), analysis of levosulpiride in plasma samples was carried out using a reverse phase C18 column with fluorescence detector (maximum excitation at 300 nm and maximum emission at 365 nm) for separation and quantification. A mixture of methanol-20 mM phosphate buffer (pH 3.5, 16:84, v/v) was used as a mobile phase. The method was specific and sensitive with a limit of quantification of 5 ng/ml. This HPLC method was validated by examining the precision and accuracy for inter- and intra-day analysis in the concentration range of 5-150 ng/ml. The relative standard deviation (R.S.D.) in inter- and intra-day validation were 8.16-19.75 and 3.90-11.69%, respectively. In stability tests, levosulpiride in human plasma was stable during the storage and assay procedure. The method was applied to the bioequivalence study of two levosulpiride tablet formulations (25 mg) after a single oral administration.
authors.affiliation: Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, San 56-1, Shillim-Dong, Kwanak-Gu, Seoul 151-742, South Korea.
authors.forename: Su-Eon
authors.initials: SE
authors.lastname: Jin
authors.forename: Eunmi
authors.initials: E
authors.lastname: Ban
authors.forename: Yang-Bae
authors.initials: YB
authors.lastname: Kim
authors.forename: Chong-Kook
authors.initials: CK
authors.lastname: Kim
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D006801:Humans; D012680:Sensitivity and Specificity; D013469:Sulpiride / Q000031:analogs & derivatives* / Q000097:blood* / Q000737:chemistry*
chemical_list: D013469:Sulpiride; C078143:levosulpiride