The simultaneous determination of betamethasone, dexchlorpheniramine maleate, and sodium benzoate in pharmaceutical syrup\nwas done by using a simple validated HPLC method. The chromatographic separation of the three analytes was done in a C18\ncolumn maintained at 25DegreeC, using a mixture of acetonitrile and 0.02M phosphate buffer solution pH 2.70 (35 : 65, v : v) as mobile phase...............
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