| 
      an = 6
        | Formulation | Amount of drug added (%) | Thereotical content (ng) | Amount of MET    recovered (ng) mean | % Recovery |  
        | Glycomet | 80 | 18000 | 18018 | 100.10 |  
        | 100 | 20000 | 19846 | 99.93 |  
        | 120 | 22000 | 21995.6 | 99.98 |  
        | Biciphage | 80 | 30600 | 30544.92 | 99.82 |  
        | 100 | 34000 | 33874.2 | 99.63 |  
        | 120 | 37400 | 37171.86 | 99.39 |  
        | Bigomet | 80 | 9000 | 9003.6 | 100.04 |  
        | 100 | 10000 | 9997 | 99.97 |  
        | 120 | 11000 | 11031.9 | 100.29 |  |