Application of 73590-85-9. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 5-Methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridyl)methyl]thio]benzimidazole, is researched, Molecular C17H19N3O2S, CAS is 73590-85-9, about Development and validation of a precise single HPLC method for determination of omeprazole and its related compound in pharmaceutical formulation. Author is Trivedi, Harshal K.; Patel, Mukesh C..
A simple reversed-phase high performance liquid chromatog. was developed and employed for the determination of omeprazole and its related substances in bulk material and com. dosage forms. A gradient elution of filtered sample was performed on Zorbax XDB C8 (150 × 4.6), 5μ column with Glacine buffer (pH-8.8) as a mobile phase-A, Acetonitrile : Methanol (83:17) as a mobile phase-B and UV detection at 302 nm. Mobile phase was delivered at flow of 1.2 mL/min and at maintaining the column temperature at 25°C, quantification was achieved with reference to the external standards The active ingredient – omeprazole was successfully separated from its all related substances, including process impurities and other possible impurities of oxidation and decomposition The excipients did not interfere with the determination of omeprazole and its related compound in com. dosage formulations. The method was rapid, simple, accurate and reproducible. It was not only successfully employed for the assay of omeprazole in bulk material and pharmaceutical dosage forms but also for the determination of its related substances. A statistical design of experiments was used for the robustness evaluation of HPLC anal. method. All results were acceptable and confirmed that the method is suitable for its intended use.
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