Precision Factors changed
pH  ±  0.05 Flow rate(ml. min-1)  ± 0.2 Methanol %  ±  0.2%
2.65 2.7 2.75 1.45 1.5 1.55 79.8 80 80.2
Lef %RSD 0.62 0.78 0.65 0.99 0.78 0.39 0.23 0.78 0.73
Flur %RSD 0.079 0.534 1.04 0.78 0.534 0.25 0.62 0.534 0.96
Ibu %RSD 0.58 0.166 0.35 0.056 0.166 0.87 1.02 0.166 1.03
Mef %RSD 0.742 0.016 1.05 0.044 0.016 1.08 0.029 0.016 0.57
Diclo %RSD 0.43 0.29 0.48 0.82 0.29 0.92 0.45 0.29 0.43
Lef=leflunomide, Flur=flurbiprofen, Ibu=ibuprofen, Mef=mefanamic acid, Diclo=diclofenac sodium. n=6
Table 4: %RSD during robustness analysis.