Calibration curve of candesartan cilexetil in HCl buffer (pH 1.2). Candesartan cilexetil was dissolved in HCl buffer (pH 1.2) at a concentration of 5, 10, 20, 30 and 50 µg.ml-1, and the U.V. absorbance at λmax 254 nm was gained. Data are represented as mean ± standard deviation of 3 independent experiments.