title: Analysis of different beta-lactams antibiotics in pharmaceutical preparations using micellar electrokinetic capillary chromatography.
abstract: The potential of micellar electrokinetic capillary chromatography (MEKC) for analyzing nine beta-lactams antibiotics (cloxacillin, dicloxacillin, oxacillin, penicillin G, penicillin V, ampicillin, nafcillin, piperacillin, amoxicillin) in different pharmaceutical preparations, have been demonstrated. An experimental design strategy has been applied to optimize the main variables: pH and buffer concentration, concentration of the micellar medium, separation voltage and capillary temperature. Borate buffer (26mM) at pH 8.5 containing 100mM sodium dodecyl sulphate (SDS) was used as the background electrolyte. The method was validated. Linearity, limit of detection and quantitation and precision were established for each compound. The analysis of some of the beta-lactams in Orbenin capsules, Britapen tables and in Veterin-Micipen injectable, all used in human and veterinary medicine, have demonstrated the applicability of these technique for quality control in the pharmaceutical industry.
authors.affiliation: Department of Analytical Chemistry, Faculty of Sciences, University of Granada, 18071 Granada, Spain.
authors.forename: M I Bailón
authors.initials: MI
authors.lastname: Pérez
authors.forename: L Cuadros
authors.initials: LC
authors.lastname: Rodríguez
authors.forename: C
authors.initials: C
authors.lastname: Cruces-Blanco
mesh_terms: D000900:Anti-Bacterial Agents / Q000032:analysis*; D002021:Buffers; D002138:Calibration; D002214:Capsules; D020374:Chromatography, Micellar Electrokinetic Capillary / Q000379:methods* / Q000592:standards; D006863:Hydrogen-Ion Concentration; D015394:Molecular Structure; D004364:Pharmaceutical Preparations / Q000737:chemistry / Q000592:standards; D019999:Pharmaceutical Solutions; D011786:Quality Control; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013607:Tablets; D013678:Technology, Pharmaceutical / Q000379:methods* / Q000592:standards; D013696:Temperature; D019155:Veterinary Drugs / Q000737:chemistry / Q000592:standards; D047090:beta-Lactams / Q000032:analysis*
chemical_list: D000900:Anti-Bacterial Agents; D002021:Buffers; D002214:Capsules; D004364:Pharmaceutical Preparations; D019999:Pharmaceutical Solutions; D013607:Tablets; D019155:Veterinary Drugs; D047090:beta-Lactams