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pH Calibration solution.
| Composition | Concentration |
|---|---|
| Potassium chloride (KCl) | 135 mM |
| HEPES | 20 mM |
| Dipotassium phosphate (K2HPO4) | 10 mM |
| Calcium chloride (CaCl2) | 1.2 mM |
| Magnesium sulfoxide (MgSO4) | 1 mM |
| Nigericin | 20 μM |
| Adjusting pH to 5.5–8.5 (0.5 Interval) | |
