| 
      *Expressed as the ratio of the signal of the analyte in the presence of interferent to
    that of the analyte alone
        | Compound | Analyte :    Interferent  (w:w) | Relative Sensitivity  (%)* |  
        | Acetaminophen | 1:1 | 95.86 |  
        | Caffeine | 1:1 | 96.43 |  
        | Salicylamide | 1:1 | 96.57 |  
        | Codeine | 1:1 | 97.28 |  
        | Aspirin | 1:1 | 97.13 |  |