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Table 4 Determination of FEX and MON in pharmaceutical preparations using the proposed method and reference methods

From: New pencil graphite electrodes for potentiometric determination of fexofenadine hydrochloride and montelukast sodium in their pure, synthetic mixtures, and combined dosage form

Commercial Name Composition Amount found, mga R% ± SD t-valueb F-valuec
Sensor 1 FEX.Mol
 Fexofenadine Fexofenadine 120 mg 119.37 99.47 ± 1.16 1.06 3.53
 Azmalir Montelukast 10 mg
 Combination form Fexofenadine 120 mg 119.27 99.39 ± 0.87 1.96 3.39
Montelukast 10 mg
Sensor 2 MON.Co
 Fexofenadine Fexofenadine 120 mg
 Azmalir Montelukast 10 mg 10.05 100.5 ± 1.74 4.07 1.66
 Combination form Fexofenadine 120 mg
Montelukast 10 mg 9.97 99.71 ± 1.61 2.82 3.20
Sensor 3 FEX.MOl + MON.Co
 Fexofenadine Fexofenadine 120 mg 119.53 100.39 ± 0.78 2.26 3.46
 Azmalir Montelukast 10 mg 10.12 98.80 ± 1.20 2.77 1.77
 Combination form Fexofenadine 120 mg 120.83 100.69 ± 0.69 2.13 2.95
Montelukast 10 mg 9.89 98.88 ± 1.34 2.22 3.30
  1. aAverage of 3 replicates
  2. bt critical 4.302 (0.05)
  3. cf critical 19 (0.05), n = 3