Abstract:
A simple, accurate, rapid, economical UV spectrophotometry methods namely
Absorption ratio, and RP-HPLC methods have been developed and validated for
estimation of Ezetimibe and Fenofibrate in combined tablet dosage form and can
be used in routine analysis. In Absorbance ratio method absorbance measured at
Iso-absorptive point 253 nm (correlation coefficient was found to be 0.998 and
0.996 for Ezetimibe and Fenofibrate) and 286 nm (correlation coefficient was
found to be 0.997 and 0.997 for Ezetimibe and Fenofibrate).The LOD was found
to be 0.003355μg/mL and 0.076206 μg/mL for Ezetimibe and Fenofibrate
respectively. The LOQ was found to be 0.010167μg/mL and 0.230927 μg/mL
for Ezetimibe and Fenofibrate respectively.The methods were found to be linear
in the concentration range of 2-12μg/mL and 2-12μg/mL for both the drugs.
In RP-HPLC, method was carried out by isocratic technique on a reversed-phase:
phenomenex luna ODS C18 (250mm X 4.6 mm i.d.,5 μm particle size) and UV
detection at 253 nm with mobile phase containing a mixture of Methanol: Water
(90:10)at a flow rate of 1.0 mL/min. The average retention times for Ezetimibe and Fenofibrate were 3.34 and 6.09 min respectively. The calibration curves were
linear in the concentration range of 1-6μg/mL and 16-96μg/mL for Ezetimibe and
Fenofibrate respectively. Correlation co efficient were found to be 0.999 and
0.997 for Ezetimibe and Fenofibrate respectively. The LOD was found to be
0.158612 μg/mL and 0.459654 μg/mL for Ezetimibe and Fenofibrate
respectively. The LOQ was found to be 0.480643 μg/mL and 1.392891μg/mL
for Ezetimibe and Fenofibrate respectively.
