Y. Vijitha*, V. Hari Baskar, M. Gobinath, Ramesh Dhani, V. Pavan Kumar, G. Varun Kumar
Department of Pharmaceutical Analysis, Ratnam Institute of Pharmacy, Pidathapolur, Muthukur, SPSR Nellore, A.P, India.
A B S T R A C T
A simple, sensitive and reproducible reverse-phase high performance liquid chromatographic (RP- HPLC) method has been developed for simultaneous quantitative estimation of Atorvastatin calcium (ATOR) and Telmisartan (TELM) in the pharmaceutical formulations. Chromatographic separation was achieved on a 250 × 4.6 mm, 5µ, Waters symmetry column. The flow rate was 1ml/min and eluent was monitored by absorbance at 267 nm using a mixture of Methanol and Acetonitrile (pH 3.0±0.01) in the ratio of 25:75 (v/v). The retention time of Atorvastatin calcium and Telmisartan was found to be 5.6 and 8.2 min respectively. Calibration plots were linear in the concentration range of 5- 25 µg/ml for Atorvastatin calcium and 10-50 µg/ml for Telmisartan with correlation coefficient (R2) 0.999 respectively. The proposed method was validated by testing its linearity, recovery, specificity, system suitability, precision, robustness and LOD/LOQ values and it was successfully employed for the determination of Atorvastatin calcium and Telmisartan in pharmaceutical tablet formulations.
Keywords: Atorvastain caicium, Telmisartin, Validation and RP-HPLC