RESUMO
A rapid and sensitive high-performance thin-layer chromatographic (HPTLC) method has been developed for the measurement of sparfloxacin in human plasma and its use for pharmacokinetic study has been evaluated. Detection and quantitation were performed without using an internal standard. A single stage extraction procedure was followed for extracting sparfloxacin from plasma and a known amount of the extract was spotted on precoated silica gel 60 F254 plates using a Camag Linomat IV autosampler. Sparfloxacin was quantified using a Camag TLC Scanner 3. The recovery study of authentic analytes added to plasma at 0.1 to 0.8 microgram ml-1 was 94.9 +/- 0.98% and the lowest amount of sparfloxacin that could be detected was 50 ng ml-1 plasma. The method provides a direct estimate of the amount of sparfloxacin present in plasma. The method was used for the determination of plasma levels as well as pharmacokinetic parameters of sparfloxacin after oral administration of two marketed preparations to healthy volunteers.
Assuntos
Anti-Infecciosos/sangue , Antituberculosos/sangue , Cromatografia Líquida de Alta Pressão/métodos , Fluoroquinolonas , Quinolonas/sangue , Administração Oral , Adulto , Anti-Infecciosos/administração & dosagem , Anti-Infecciosos/farmacocinética , Antituberculosos/administração & dosagem , Antituberculosos/farmacocinética , Área Sob a Curva , Disponibilidade Biológica , Humanos , Masculino , Quinolonas/administração & dosagem , Quinolonas/farmacocinéticaRESUMO
A rapid and sensitive high-performance thin-layer chromatography (HPTLC) method has been developed for the measurement of lansoprazole in human plasma and its use for pharmacokinetic study has been evaluated. Detection and quantitation were performed without using an internal standard. A single stage extraction procedure was followed for extracting lansoprazole from plasma and a known amount of the extract was spotted on precoated silica gel 60 F254 plates using a Camag Linomat IV autosampler. Lansoprazole was quantified using a Camag TLC Scanner 3. The recovery study of authentic analytes added to plasma at 0.05 to 0.25 microg/ml was 95.37+/-2.15% and the lowest amount of lansoprazole that could be detected was 20 ng/ml plasma. The method provides a direct estimate of the amount of lansoprazole present in plasma. The method was used for the determination of plasma levels as well as pharmacokinetic parameters of lansoprazole after oral administration of two marketed preparations to healthy volunteers.
Assuntos
Antiulcerosos/sangue , Inibidores Enzimáticos/sangue , Omeprazol/análogos & derivados , Inibidores da Bomba de Prótons , 2-Piridinilmetilsulfinilbenzimidazóis , Adulto , Antiulcerosos/administração & dosagem , Antiulcerosos/farmacocinética , Cromatografia em Camada Fina , Inibidores Enzimáticos/administração & dosagem , Inibidores Enzimáticos/farmacocinética , Humanos , Lansoprazol , Masculino , Omeprazol/administração & dosagem , Omeprazol/sangue , Omeprazol/farmacocinética , Comprimidos com Revestimento EntéricoRESUMO
A high-performance thin-layer chromatographic procedure has been developed for the determination of ranitidine, a H2-receptor antagonist, in plasma. The detection and quantification were performed without using internal standards. A single-stage extraction procedure was followed for extracting ranitidine from plasma, and a known amount of the extract was spotted on precoated silica gel F254 plates. Ranitidine was quantified using a Shimadzu CS930 dual-wavelength TLC scanner. The method provides a direct estimate of total ranitidine present in the plasma.
