Abstract:
The RP-HPLC method was developed and validated for simultaneous estimation
of Lisinopril and Hydrochlorothiazide bulk and its tablet dosage form. The RPHPLC
method has shown adequate separation of Lisinopril and
Hydrochlorothiazide in bulk and its dosage form. The separation was achieved on
a BDS hypersil C18, (250mm X 4.6mm i.d., 5μm particle size) using potassium
dihydrogen phosphate buffer pH 5.5: ACN (40:60 v/v) as mobile phase. The
mobile phase at a flow rate of 1.0 ml/min, injection volume 20μl and wavelength
of detection used was 210 nm. The retention time for Lisinopril and
Hydrochlorothiazide was obtained as 3.523 min and 5.247 min, respectively. The
linearity of the proposed method was investigated in the range of 5-15 μg/ml and
6.25-18.75 μg/ml for Lisinopril and Hydrochlorothiazide, respectively. Regression
coefficient for Lisinopril and Hydrochlorothiazide obtained as 0.997 and 0.998,
respectively. The developed method was validated as per ICH guideline, for its accuracy, precision, LOD & LOQ, Robustness, specificity and the results were
found to be satisfactory, thus the method is accurate, precise, rapid and simple for
estimation of Lisinopril and Hydrochlorothiazide.
