Research Article

Development and Validation of Stability-Indicating RP-UPLC Method for the Determination of Methdilazine in Bulk Drug and in Pharmaceutical Dosage Form

Table 2

Summary of stationary phase optimization.

Stationary phaseDimensionObservations/remarks

Acquity BEH Phenyl(100 × 2.1) mm, 2 μmPeak eluted very early with higher tailing
Acquity BEH C8(50 × 2.1) mm, 1.7 μmNo retention of MDH, eluted very early
Eclipse Plus C18, RRHD(50 × 2.1) mm, 1.8 μmPeak fronting observed
Acquity BEH C8(100 × 2.1) mm, 1.7 μmPeak eluted before 1 min
Acquity BEH C18(100 × 2.1) mm, 1.7 μmSatisfactory peak shape observed