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