SIMULTANEOUS ESTIMATION OF ATORVASTATIN AND AMLODIPINE IN RAW MATERIAL AND IN COMBINED TABLET DOSAGE FORM BY RP-HPLC
About Authors:
Kapil Sharma*1, Subhash Gupta 2
1 Yaresun Pharmaceutical Pvt. Ltd.,India.
2 Oasis test house ltd. Jaipur-302006, Rajasthan, India.
*pharma_kapil@rediffmail.com
ABSTRACT
A method for simultaneous estimation of Atorvastatin (ATVS) and Amlodipine (AMLD) in raw material and in combined tablet dosage form has been developed. The method employs the application of RP-HPLC. Chromatgraphy was carried out on a nucleosil C-18,250 x 4.6 mm column using a mixture of phosphate buffer and methanol (50:50 v/v) as the mobile phase at a flow rate of 1.3 ml/min. Run time was 15 min. Detection was done at 245 nm and retention time of ATVS was 6.97 min and 3.96 min of AMLD.3 This method produced linear responses in the concentration range 20-140 µg/ml and 10-70 µg/ml for ATVS and AMLD respectively. The accuracy of the method was assessed by recovery studies and was found to be 100.54± 0.19 and 100.08±0.80 for ATVS and AMLD respectively.The procedure was successfully applied for the simultaneous determination of both drugs in laboratory prepared mixture of raw material and in market available tablet dosage form. Results of the analysis were validated statistically so that it can be used for routine analysis of ATVS and AMLD in combined tablet dosage form.4-6

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