Volatile buffering salts
| Substance | pKa | Working pH | Counterion |
|---|---|---|---|
| Formic acid | 3.8 | 3.3-4.3 | NH+3 |
| Acetate | 4.7 | 4.3-5.2 | NH+4 |
| Pyridine/acetate | 5.35/4.74 | 4.3-5.9 | CH3COO− |
| N-Ethylmorpholine | 7.7 | 7.2-8.2 | CH3COO− |
| Ammonium | 9.25 | 8.7-9.7 | CH3COO− |
| Trimethylamine | 9.8 | 9.3-10.3 | CH3COO− |
