Method Parameter Normal Condition Deliberate Change %RSD of peak area (n=3)
ALP MEB
Flow rate 1.0 ml/min 0.8 ml/min 0.49 1.14
1.2 ml/min 0.60 1.06
Mobile phase ratio Methanol: Buffer (70:30) 72:28 1.01 1.90
68:32 1.12 1.81
pH of mobile phase ratio 5.0 5.2 0.58 0.67
4.8 0.69 1.02
Table 3: Robustness Data For Alp and Meb By Proposed Rp- Lc Method.