 
            
        This is an Application Brief and does not contain a detailed Experimental section.
This application brief demonstrates the gradient chemical stability study on XBridge HILIC column.
The compounds used in this study are-
 
            
        | Column: | XBridge HILIC, 2.1 x 50 mm, 3.5 μm | 
| Part Number: | 186004432 | 
| Mobile Phase A: | 95:5 acetonitrile:water with 10 mM NH4 + CH3COO- pH 5.5 | 
| Mobile Phase B: | 50:50 acetonitrile:water with 10 mM NH4 + CH3COO- pH 5.5 | 
| Flow Rate: | 0.5 mL/min | 
| Injection Volume: | 2.0 μL (full loop) | 
| Weak Needle Wash: | 95:5 acetonitrile:water | 
| Sample Diluent: | 75:25 acetonitrile:methanol | 
| Temperature: | 30 °C | 
| Detection: | UV @ 254 nm | 
| Sampling Rate: | 40 pts/sec | 
| Time Constant: | 0.05 | 
| Instrument: | Waters ACQUITY UPLC with TUV detector | 
| Time(min) | Profile | Curve | |
| %A | %B | ||
| 0 | 99 | 1 | 6 | 
| 2.0 | 1 | 99 | 6 | 
| 2.1 | 99 | 1 | 6 | 
| 2.5 | 99 | 1 | 6 | 
 
            
        WA64080, August 2009