| 
      aThe average of six determinations
The t- and F- values refer to comparison of the proposed methods with the official
method. Tabulated t- and F- values for p= 0.05 and fi ve degrees of freedom are
2.33 and 5.05
        | Dodage forms | Supplier | Nominal value
 | Recovery (%)a |  
        | BPB | BTB | BCG | BCP | Official |  
        | Allerfen tablet | Amoun pharmaceutical Co. S.A.E.
 | 60 mg per tab
 | 99.98 | 100.10 | 100.05 | 100.08 | 99.97 |  
        | t- 0.19 | t-0.97 | t- 0.97 | t- 0.97 |  |  
        | F- 1.33 | F- 2.96 | F- 2.47 | F- 1.57 |  |  
        | Fexon tablet
 | Alkan Pharma. S.A.E.
 | 180 mg per tab.
 | 100.01 | 100.04 | 99.98 | 100.02 | 99.89 |  
        | t- 0.25 | t- 0.89 | t- 0.89 | t- 0.69 |  |  
        | F- 1.73 | F- 1.92 | F- 2.83 | F- 1.92 |  |  
        | Fastofen tablet | EIPICO | 120 mg per tab.
 | 100.33 | 100.01 | 100.01 | 100.05 | 100.2 |  
        | t- 0.17 | t- 1.28 | t- 0.73 | t- 0.92 |  |  
        | F- 2.18 | F- 1.96 | F-1.97 | F- 2.73 |  |  |