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Densitometric determination of omeprazole, pantoprazole, and their impurities in pharmaceuticals
(Research Inst Medicinal Plants, Budakalasz, 2004)
A method has been developed for separation of omeprazole and pantoprazole, and their impurities omeprazole sulfone and N-methylpantoprazole, by HPTLC. The mobile phase chloroform-2-propanol-25% ammonia-acetonitrile, 10.8 ...
Chromatographic determination of dissociation constants of pramipexole and its impurities
(Vieweg, Wiesbaden, 2007)
The main goal in this investigation was monocratic HPLC determination of dissociation constant values (pK(a)) of pramipexole and its impurities, BI-II 546 CL, BI-II 751 xx and 2-aminobenzothiazole. The chromatographic ...
LC determination of lercanidipine and its impurities using DryLab software and experimental design procedures
(Vieweg, Wiesbaden, 2008)
The main objective in all optimization procedures is to define the most appropriate conditions for rapid, sensitive, precise, and reproducible analysis, as economically as possible. Experimental design and DryLab optimization ...
A chemometrical approach to optimization and validation of an HPLC assay for rizatriptan and its impurities in tablets
(Taylor & Francis Inc, Philadelphia, 2007)
An isocratic reversed-phase high-performance liquid chromatographic method was developed and validated for the analysis of a novel antimigraine drug, rizatriptan benzoate, in a dosage form along with its two impurities, ...
Monitoring of impurity level of valsartan and hydrochlorothiazide employing an RP-HPLC gradient mode
(Taylor & Francis Inc, Philadelphia, 2007)
The multi-component preparation Co -Diovan (R) is indicated for the hypertension treatment in patients whose blood pressure is not adequately controlled by monotherapy. Its active ingredients are valsartan and hydrochlorothiazide. ...