Injection Retention Time Area Injection-1 2.734 553001 Injection-2 2.731 559476 Injection-3 2.738 553994 Injection-4 2.738 552953 Injection-5 2.731 553012 Injection-6 2.732 553032 Average 2.734 554245 Standard Deviation 0.003 2593.64 %RSD 0.12 0.47

Table 1: Intra-day precision of the proposed method for Metformin in plasma.