ESTIMATION OF HYDROCHLOROTHIAZIDE IN BULK AND TABLET DOSAGE FORMS BY AREA UNDER CURVE SPECTROPHOTOMETRIC METHOD

A simple, accurate and precise area under curve method was developed for spectrophotometric estimation of hydrochlorothiazide in pure and tablet dosage forms. “The area under two points on the mixture spectra is directly proportional to the concentration of the component of interest” is the AUC curve. The area selected for estimation of hydrochlorothiazide was between 260 to 280 nm. The method represented regression coefficient (R2 = 0.999) at concentration rang 5-25 μg/ml. Estimation of the drugs was found up to 100 % representing the accuracy of the method. The recovery of the hydrochlorothiazide was found up to 100 %. Validation of the proposed method was carried out for its accuracy, precision and specificity according to ICH Q2 (R1) guidelines. The developed methods can be successfully applied in routine work for the estimation of hydrochlorothiazide in its pharmaceutical dosage form