| Table 3 | 
      
        |  |  |  |  |  |  |  |  |  |  | 
      
        | Intra and Inter     accuracy and precision for topiramate | 
      
        |  |  |  |  |  |  |  |  |  |  | 
      
        | Topiramate  intra    assay precision and accuracy |  | Topiramate  inter    assay precision and accuracy | 
      
        | Quality control samples | Conc. added (ng/ml) | Mean conc. found (ng/ml) (a) | SD | Precision % CV | Accuracy (%) | Mean conc. found (ng/ml) (b) | SD | Precision % CV | Accuracy (%) | 
      
        |  |  |  |  |  |  |  |  |  |  | 
      
        | LLOQ | 10 | 9.870 | 1.018 | 10.32 | 98.70 | 9.923 | 1.271 | 12.81 | 99.23 | 
      
        |  |  |  |  |  |  |  |  |  |  | 
      
        | LQC | 30 | 30.907 | 0.691 | 2.24 | 103.02 | 30.705 | 1.470 | 4.79 | 102.35 | 
      
        |  |  |  |  |  |  |  |  |  |  | 
      
        | MQC | 1500 | 1503.451 | 83.393 | 5.55 | 100.23 | 1489.480 | 104.147 | 6.99 | 99.30 | 
      
        |  |  |  |  |  |  |  |  |  |  | 
      
        | HQC | 3000 | 2994.612 | 83.271 | 2.78 | 99.82 | 3093.498 |   49.904 | 1.61 | 103.12 | 
      
        | (a) = mean of six replicates |  | 
      
        | (b) = mean of thirty replicates | 
      
        | Conc. = Concentration |