Table 2A. UHPLC gradient elution profiles for each polarity.
| HILIC Phase | ||
| Time (mins) | % Buffer Composition | |
| Buffer A - Acetonitrile:Water (95:5) with 5mM Ammonium Formate (pH 3) | Buffer B - Water:Acetonitrile (95:5) with 5mM Ammonium Formate (pH 3) | |
| 0 | 95 | 5 |
| 1 | 95 | 5 |
| 12 | 55 | 45 |
| 15 | 55 | 45 |
| 16 | 95 | 5 |
| 21 | 95 | 5 |
| Reversed Phase (C18) | ||
| Time (mins) | % Buffer Composition | |
| Buffer A - Water with 0.1% Formic Acid | Buffer B - Methanol with 0.1% Formic Acid | |
| 0 | 95 | 5 |
| 2 | 95 | 5 |
| 9 | 5 | 95 |
| 12 | 5 | 95 |
| 13 | 95 | 5 |
| 16 | 95 | 5 |