Days Retention Time Peak area Day -1* 8.774 71316 Day -2* 8.774 71804 Day -3* 8.773 71774 Average 8.773 71631 Standard Deviation 0.006 273.5 % RSD 0.007 0.38

Table 5: Inter-day precision of the proposed method for Ramipril in plasma (on three consecutive days n = 6).