Table 2.
Differences between the results from the electrode method and calculation for each ligand.
| Variable | Electrode Ca2+ (mean; mM) | Calcium-complex compounds | Difference of measurement and calculation (B-A) | Moore’s calcium-complex compounds | |
|---|---|---|---|---|---|
|
| |||||
| From measurement* measurement (A) | From calculation (B) | ||||
| 1.0 mM Ca | 0.99 | – | – | – | – |
| 1.0 mM Ca + 1.0 mM phosphorus | 0.97 | 0.02 | 0.23 | 0.21 | 0.01 |
| 1.0 mM Ca + 0.12 mM citrate | 0.95 | 0.05 | 0.10 | 0.05 | 0.08 |
| 1.0 mM Ca + 1.0 mM lactate | 0.99 | 0.00 | 0.00 | 0.00 | 0.02 |
| 1.0 mM Ca + 30 mM hydrogen carbonate | 0.83 | 0.17 | 0.23 | 0.06 | 0.14 |
| Total difference measurement | 0.24 | 0.56 | 0.32 | 0.25 | |
Notes:
*
Moore’s measurements were obtained using the following concentrations: 1.5 mM Ca, 1.0 mM phosphorus, 0.12 mM citrate, 1.0 mM lactate and 25 mM hydrogen carbonate.