Determination of pantoprazole, rabeprazole, esomeprazole, domperidone and itopride in pharmaceutical products by reversed phase liquid chromatography using single mobile phase

A simple, sensitive, and precise high performance liquid chromatographic method for the analysis of pantoprazole, rabeprazole, esomeprazole, domperidone and itopride, with ultraviolet detection at 210 nm, has been developed, validated, and used for the determination of compounds in commercial pharmaceutical products. The compounds were well separated on a Hypersil BDS C18 reversed-phase column by use of a mobile phase consisting of 0.05 M, 4.70 pH, potassium dihydrogen phosphate buffer - acetonitrile (720:280 v/v) at a flow rate of 1.0 mL min(-1). The linearity ranges were 400-4,000 ng mL(-1) for pantoprozole, 200-2,000 ng mL(-1) for rabeprazole, 400-4,000 ng mL(-1) for esomeprazole, 300-3,000 ng mL(-1) for domperidone and 500-5,000 ng mL(-1) for itopride. Limits of detection (LOD) obtained were: pantoprazole 147.51 ng mL(-1,) rabeprazole 65.65 ng mL(-1), esomeprazole 131.27 ng mL(-1), edomperidone 98.33 ng mL(-1) and itopride 162.35 ng mL(-1). The study showed that reversed-phase liquid chromatography is sensitive and selective for the determination of pantoprazole, robeprazole, esomeprazole, domperidone and itopride using single mobile phase.