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Provedor de dados:  BJPS
País:  Brazil
Título:  Application of capillary electrophoresis to the simultaneous determination and stability study of four extensively used penicillin derivatives
Autores:  Simon,Brigitta
Data:  2014-09-01
Ano:  2014
Palavras-chave:  Penicillin/derivatives/stability study
Capillary electrophoresis/drugs analysis
Resumo:  The applicability of capillary electrophoresis for the analysis of four extensively used penicillin derivatives (benzylpenicillin, ampicillin, amoxicillin, oxacilllin) has been studied. Because of structural similarities, the electrophoretic behavior of these derivatives is very similar; consequently an efficient separation using the conventional capillary zone electrophoresis is hard to be achieved. Their simultaneous separation was solved by using micellar electrokinetic capillary chromatography, the separation being based on the differential partition of the analytes between the micellar and aqueous phase. Using a buffer solution containing 25 mM sodium tetraborate and 100 mM sodium dodecyl sulfate as surfactant, at a pH of 9.3, applying a voltage of + 25 kV at a temperature of 25 °C, we achieved the simultaneous separation of the studied penicillin derivatives in less then 5 minutes. The separation conditions were optimized and the analytical performance of the method was evaluated in terms of precision, linearity, limit of detection, and quantification. Also, a simple capillary zone electrophoresis method was applied to study the stability of the studied penicillin derivatives in water at different temperatures, using ciprofloxacin hydrochloride as internal standard. It was observed that the extent of the hydrolysis of penicillins in water is highly dependent on the time and also temperature.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Universidade de São Paulo, Faculdade de Ciências Farmacêuticas
Relação:  10.1590/S1984-82502014000300010
Formato:  text/html
Fonte:  Brazilian Journal of Pharmaceutical Sciences v.50 n.3 2014
Direitos:  info:eu-repo/semantics/openAccess

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