Gebremariam Ketema

A simple, rapid and specific RP-HPLC method has been developed and validated for determination of Carvedilol in bulk and tablet formulations. Chromatographic separation was performed by Phenomenex Luna C-18 (250 x 4.6mm, 5μm particle size) column with a mobile phase consisting of a mixture of phosphate buffer, acetonitrile and methanol in the ratio (30:45:25 v/v/v), pH adjusted to 4.8 with ortophosphoric acid. The mobile phase was was filtered through a 0.45μ cellulose nitrate filter, sonicated for 15 min and delivered at a flow rate of 1ml/min. Detection was performed at a wave length of 241 nm at ambient temperature. Linearity was obtained in a concentration range of 30 to130 µg/ml with a correlation coefficient (r2) of 0.999. The limit of detection and limit of quantification were 1.08 and 3.24 μg/ml, respectively. No interference of excipients in determining tablet formulation; identical results were obtained like that of the standard sample.  The proposed RP-HPLC method is simple, accurate, precise, rapid and economical to be employed for routine analysis of carvedilol in pharmaceutical dosage forms.