作者: Avani B. Chokshi , Pritesh R. Desai , Urvesh Mahendrabhai Patel
DOI:
关键词: Dosage form 、 Chromatographic separation 、 Hydrochlorothiazide 、 Phosphate buffered saline 、 HYDROCHLOROTHIAZIDE/OLMESARTAN 、 Chromatography 、 Chemistry 、 Olmesartan
摘要: Objective: Development of RP-HPLC method for determination Hydrochlorothiazide (HCTZ), Olmesartan medoxomil (OLM) and their related substances in combined tablet dosage form validation the developed method. Methods: Gradient mobile phase system was used estimation drug contents substances. Mobile A contained mixture Acetonitrile 15 mM Phosphate buffer (pH adjusted to 3.4 with orthophosphoric acid) ratio 20:80. B same 80:20. Chromatographic separation carried out at flow rate 0.8 mL/min using C 18 Phenomenax inplace Enable (250 × 4.6 mm) 5 μm column detection made 254 nm. Results: The linearity tested range 62.5-187.5 μg/mL Hydrochlorothiazide, 100-300 medoxomil, 1-1.8 Hydrochlorothiazide. % recovery found be 99.88-100.67 99.14-99.91 (OLM), 99.11-100.71% (HCTZ-IMP) 98.13-100.83% (OLM-IMP). assay marketed formulation 99.78% (HCTZ) 99.26% (OLM). Conclusion: simple, precise accurate