| Drug | 
        Mobile phasea | 
        Flow rate mL/min | 
        λ(nm) | 
       
      
        | Metaprolol  | 
        A  | 
        0.7  | 
        230  | 
       
      
        | Naproxen  | 
        B  | 
        0.8  | 
        235  | 
       
      
        | Ranitidine  | 
        C  | 
        0.8  | 
        270  | 
       
      
        | Cimetidine  | 
        D  | 
        1.2  | 
        254  | 
       
      
        | Ketoprofen  | 
        E  | 
        0.8  | 
        257  | 
       
      
        | Hctz  | 
        F  | 
        0.8  | 
        270  | 
       
      
        | Verapamil  | 
        G  | 
        1.3  | 
        230  | 
       
      
        | Atenolol  | 
        H  | 
        0.8  | 
        220  | 
       
      
        | Antipyrine  | 
        I  | 
        0.8  | 
        244  | 
       
      
        | Fluvastatin  | 
        J  | 
        0.9  | 
        220  | 
       
      
        | Furosemide  | 
        K  | 
        0.7  | 
        275  | 
       
      
        | Ciprofloxacin  | 
        L  | 
        1.0  | 
        254  | 
       
      |