Stability Stock solution analysis was performed at 100.0 ng/mL. proper storage after for 15 days at 2-8°C and at room temperature for 6h more than 98% of Clindipine remained unchanged, based on peak areas in comparison with freshly prepared solution of Clindipine. This suggests that the Clindipine in standard solution is stable for at least 15 days when stored at 2-8°C and for 6h at room temperature. Bench top stability of Clindipine in plasma was investigated at LQC and HQC levels. This revealed that the Clindipine in plasma was stable for at least 6 h at room temperature. It was confirmed that repeated freezing and thawing (three cycles) of plasma samples spiked with Clindipine at LQC and HQC level did not affect the stability of Clindipine Long term stability of the Clindipine in plasma at -70°C was also performed after 30 days of storage at LQC, HQC levels. The results of the stability studies are shown in table 3. The average long term stability was 96.82%. The above results indicated that the Clindipine was stable in the studied conditions.
Table 3: Stability Study of Clindipine