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Changes in HMA according to pH of added citrate buffer.
| pH | HMA(%) |
|
|---|---|---|
| Immediately after drawing | After 25 h | |
| 5.00 | 81.2 | 80.7 |
| 5.50 | 81.6 | 80.6 |
| 6.00 | 81.8 | 80.6 |
| 6.50 | 81.8 | 74.4 |
| 7.00 | 81.7 | 75.0 |
| 7.92 | 81.6 | 73.2 |
Note: The citric acid concentration of each added buffer was 140 mM (mixed citrate buffer and whole blood mixed at 1:1 ratio).
