Parameters DOM PCM TMD
Range 0.2 – 1 mg/ml 6.5 – 32.5 mg/ml 0.75 – 3.75 mg/ml
Retention time (min) 5.18 3.76 4.28
Tailing factor 1.29 1.32 1.14
Resolution 2.4
Theoretical Plates 9769 13000 14000
Detection limit (ng/ml) 1.06 20 2
Quantitation limit (ng/ml) 3.23 60 6
Accuracy (%) 99.4 – 100.4 99.40 - 100.3 98.4 - 101.9
  Precision (%RSD)
Intra-day (n=3) 0.54 – 1.56 0.53 - 1.74 0.57 – 1.40
Inter-day (n=3) 0.54 – 1.69 0.65 - 1.88 0.14 – 0.32
Instrument precision  (%RSD) 0.19 – 0.54 0.18 - 0.63 0.61 – 0.79
Specificity Specific Specific Specific
a=Limit of detection
Table 3: Summary of validation parameters of developed HPLC method.