| 
      
        | Level of Accuracy | Isomers | Isomers  
          added ( mg/mL)
 | Isomers Recovered ( mg/mL)
 | % Isomers  Recovery   (n=3) |      
        | at 50% | 1 | 0.025 | 0.0270 | 107.9 |    
        | 2 | 0.025 | 0.0255 | 102.0 |    
        | 3 | 0.025 | 0.0256 | 102.5 |    
        | at 100% | 1 | 0.050 | 0.0490 | 97.9 |    
        | 2 | 0.050 | 0.0477 | 95.3 |    
        | 3 | 0.050 | 0.0492 | 98.3 |    
        | at 150% | 1 | 0.075 | 0.0717 | 95.7 |    
        | 2 | 0.075 | 0.0732 | 97.6 |    
        | 3 | 0.075 | 0.0704 | 93.9 |  |