Figure 4: Typical HPLC chromatograms obtained from Valsartan under stress conditions:
1- Dry powder under heat. 2- Methanolic solution under heat.
3- Dry powder under light. 4- Methanolic solution under light.
5- Methanolic solution under 1.0 M HCl at 70°C.
6- Methanolic solution under 3.0 % H2O2 at 25°C.
7- Methanolic solution under 1.0 M NaOH at 70°C.