Drug name Average μg/ml Average % RSD Irbesartan 150.06 100.04 0.17% Losartan potassium 49.97 99.94 0.16% Telmisartan 80.16 100.20 0.15% Valsartan 79.96 99.95 0.13%

Table 2: Repeatability of Irbesartan, Losartan potassium, Telmisartan and Valsartan respectively.