The chromatographic behavior of atorvastatin, rosuvastatin and simvastatin in the presence of the main modifi ers of the mobile phase: elution strength and buff er solution, has been studied by means of the reverse-phase high-performance liquid chromatography (HPLC) method. Optimal modifi cation conditions have been found and their application for the determination of statins under study in the pharmaceutical preparations Atorvastatin-OBL, Liprimar and Tulip has been shown. The Sr value is 0.03. The relative determination error does not exceed 7%.
