| pH | Concentration, mM | Buffer | Purity, % | Yield, % |
| 7 | 1 | K2HPO4 | 86.1 ± 0.9 | 79.8 |
| TEAB | 90.8 ± 0.1 | 74.4 | ||
| 7 | 10 | K2HPO4 | 87.5 ± 0.4 | 79.0 |
| TEAB | 92.6 ± 0.1 | 74.9 | ||
| 7 | 20 | K2HPO4 | 87.7 ± 0.3 | 77.9 |
| TEAB | 92.6 ± 0.2 | 75.1 | ||
| 7 | 30 | K2HPO4 | 87.1 ± 0.1 | 77.5 |
| TEAB | 93.1 ± 0.1 | 74.9 | ||
| 7 | 40 | K2HPO4 | 86.9 ± 0.2 | 76.1 |
| TEAB | 93.3 ± 0.1 | 74.5 |