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Composition of the buffer solutions used to adjust the pH of the media L1–4.
| pH | Composition |
|---|---|
| 3 | 7.74 g citric acid (waterfree) + 3.49 g NaCl + 206 mL NaOH (c = 0.1 mol/L) |
| 4 | 10.75 g citric acid (waterfree) + 2.57 g NaCl + 68 mL NaOH (c = 1 mol/L) |
| 5 | 18.52 g citric acid (waterfree) + 196.4 mL NaOH (c = 1 mol/L) |
| 6 | 11.46 g citric acid (waterfree) + 159.6 mL NaOH (c = 1 mol/L) |
| 7 | 3.52 g KH2PO4 + 7.26 g Na2HPO4 · 2H2O |
