 
            
        This is an Application Brief and does not contain a detailed Experimental section.
This application brief highlights the analysis of caffeine and metabolites using XBridge C18 Columns.
 
            
         
            
         
            
         
            
        | Column: | XBridge C18, 5 μm, 4.6 x 150 mm p/n: 186003116 | 
| Mobile Phase A: | 5 Mm ammonium acetate pH 7.5 | 
| Mobile Phase B: | acetonitrile | 
| Flow Rate: | 1.0 mL/min | 
| Injection Volume: | 10 μL | 
| Sample Concentration: | 20 μg/mL in water | 
| Temperature: | 25 ˚C | 
| Detection: | UV @ 273 nm | 
| Instrument: | Alliance 2695 with 2996 PDA | 
| Time (min) | %A | %B | 
|---|---|---|
| 0.0 | 98 | 2 | 
| 15.0 | 80 | 20 | 
| 18.0 | 80 | 20 | 
| 19.0 | 98 | 2 | 
| 25.0 | 98 | 2 | 
 
            
        WA60169, April 2007