Losartan potassium Principle peak Degradation peak Sum of peak Principle peak % Degradation peak %
3 days (25°C) 4801.31 483.62 5284.93 90.85 9.151
3 days (70°C) 493.96 3597.9 4091.86 12.07 87.93
7 days (25°C) 3028.6 538.87 3567.47 84.89 15.11
7 days (70°C) 455.12 3228.05 3683.17 12.36 87.64
14 days (25°C) 2765.89 1180 3945.89 70.1 29.9
14 days (70°C) 453.8 3071 3524.8 12.87 87.13
Valsartan Principle peak Degradation peak Sum of peak Principle peak % Degradation peak %
3 days (25°C) 3896.52 45.48 3942 98.85 1.154
3 days (70°C) 2282.36 1427.87 3710.23 61.52 38.48
7 days (25°C) 4954.97 95.73 5050.7 98.1 1.895
7 days (70°C) 1938.32 2943.72 4882.04 39.7 60.3
14 days (25°C) 5110.7 150 5260.7 97.15 2.851
14 days (70°C) 1176.08 3045.26 4221.34 27.86 72.14
Irbesartan Principle peak Degradation peak Sum of peak Principle peak % Degradation peak %
3 days (25°C) 6521.5 2749.24 9270.74 70.34 29.66
3 days (70°C) 283.69 8453.58 8737.27 3.247 96.75
7 days (25°C) 5001.21 4289.9 9291.11 53.83 46.17
7 days (70°C) 314.76 9286.84 9601.6 3.278 96.72
14 days (25°C) 2751.72 6374.8 9126.52 30.15 69.85
14 days (70°C) 169.15 9116.94 9286.09 1.821 98.18
Table 9: Percentages of degradation by normalization method for Losartan potassium, Valsartan and Irbesartan respectively.