Method mg mL-1 Relative error % RSD % Recovery %
Taken Found*
BPB 1.20 1.19 -0.83 2.82 99.17
  5.00 5.01 0.20 1.61 100.20
  10.00 10.03 0.30 0.55 100.30
  20.00 20.06 0.30 0.50 100.30
  40.00 40.10 0.25 0.13 100.25
  45.00 45.16 0.35 0.11 100.36
BCP 1.10 1.08 -1.82 3.06 98.18
  5.00 5.02 0.40 1.64 100.40
  10.00 10.04 0.40 0.83 100.40
  20.00 20.00 0.00 0.61 100.00
  40.00 40.06 0.15 0.14 100.15
  47.00 47.10 0.21 0.12 100.21
Conductometry 100.0 99.80 -0.20 3.04 99.80
  200.0 200.20 0.10 1.18 100.10
  250.0 250.10 0.04 0.85 100.04
  300.0 300.07 0.02 0.81 100.02
  400.0 401.30 0.33 0.76 100.33
  500.0 502.40 0.48 0.61 100.48
*Average of six determinations
Table 3: Determination of fexofenadine hydrochloride in pure forms by BPB, BCP and condutometric methods.