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Table 3 Potentiometric determination of laboratory prepared mixtures containing various ratios of FEX and MON

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

Ratio

Recovery %

FEX

MON

FEX

MON

Sensor 1

Sensor 3

Sensor 2

Sensor 3

1

1

98.40

98.22

99.31

98.89

5

1

97.27

97.13

99.97

99.20

10

1

100.92

100.52

101.62

101.12

12

1

101.16

100.99

98.40

98.14

1

12

97.72

97.56

97.58

97.33

Mean ± SD

99.09 ± 1.82

98.88 ± 1.76

99 ± 1.84

98.94 ± 1.42