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First-order UV-derivative spectrophotometry in the analysis of omeprazole and pantoprazole sodium salt and corresponding impurities
(Pergamon-Elsevier Science Ltd, Oxford, 2003)
The first-order UV-derivative spectrophotometry, applying zero-crossing method was developed for the determination of omeprazole (OM), omeprazole sulphone (OMS), pantoprazole sodium salt (PANa), and N-methylpantoprazole ...
Retention modelling in liquid chromatographic separation of simvastatin and six impurities using a microemulsion as eluent
(Wiley-VCH Verlag GMBH, Weinheim, 2004)
A novel and unique approach was used for retention modelling in the separation of simvastatin and six impurities by liquid chromatographic using a microemulsion as mobile phase. A microemulsion is a modification of a ...
Development of a HPTLC method for in-process purity testing of pentoxifylline
(Wiley-VCH Verlag GMBH, Weinheim, 2005)
A HPTLC method for the separation and identification of pentoxifylline and related substances, impurities of reaction partners, and side reaction products has been developed using different mobile and stationary phases. ...
Simulataneous determination of nimesulide and its impurities in pharmaceutical formulations by reversed-phase high-performance liquid chromatography
(Slovensko Kemijsko Drustvo, Ljubljana, 2007)
A simple, rapid and reproducible reversed-phase high-performance liquid chromatography method for the analysis of nimesulide and its impurities both in the bulk drug and pharmaceutical formulations is reported. The method ...