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Simultaneous determination of the sulphonylurea glimepiride and its metabolites in human serum and urine by high-performance liquid chromatography after pre-column derivatization

Authors
Journal
Journal of Chromatography B Biomedical Sciences and Applications
0378-4347
Publisher
Elsevier
Publication Date
Volume
526
Identifiers
DOI: 10.1016/s0378-4347(00)82531-1
Disciplines
  • Pharmacology

Abstract

Abstract A sensitive and selective high-performance liquid chromatographic method has been developed for a new sulphonylurea, glimepiride, and its metabolites. The assay involves extraction with diethyl ether, thermolysis of the sulphonylureas at 100°C and trapping of the resulting amines with 2,4-dinitrofluorobenzene. The derivatives were quantitated on a reversed-phase column by absorbance at 350 nm using a step gradient for the three compounds in serum and an isocratic run for the metabolites in urine. Analogous compounds were used as internal standards. The detection limit was 5 ng/ml for glimepiride and metabolite II and 10 ng/ml for metabolite I using 1 ml of serum. The method has been applied to the analysis of serum and urine samples from pharmacokinetic studies in humans.

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