Drug name Recovery at 80% conc. (%) Recovery at 100% conc. (%) Recovery at 120% conc. (%) Average Recovery (%) RSD Irbesartan 100.9 101.3 100.21 100.8 0.55% Losartan potassium 100.88 101.65 100.35 100.96 0.65% Telmisartan 101.03 101.50 100.43 100.98 0.53% Valsartan 101.04 101.35 99.87 100.75 0.77%

Table 4: Recovery results for standard solution plus excipients for Hydrochlorothiazide, Irbesartan, Losartan potassium, Telmisartan and Valsartan respectively.