| 
   
  | Systems | Column | Drug | Conc. (µgmL-1) | Regression Equations | r2 |  
  | LC 10 | Hypersil,ODS | Active | 2.5-100 | y=2340.4x + 3022.3 | 0.9995 |  
  | Serum | 2.5-100 | y = 2339.4x + 3221 | 0.9996 |  
  | Purospher STAR | Active | 2.5-100 | y = 2361x + 1398.7 | 0.9999 |  
  | Serum | 2.5-100 | y = 2361x + 1398.7 | 0.9999 |  
  | LC 20 | Hypersil,ODS | Active | 2.5-100 | y=2340.4x + 3022.3 | 0.9995 |  
  | Serum | 2.5-100 | y = 2339.4x + 3221 | 0.9996 |  
  | Purospher STAR | Active | 2.5-100 | y = 2361x + 1398.7 | 0.9999 |  
  | Serum | 2.5-100 | y = 2361x + 1398.7 | 0.9999 |  |