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Measured and published pKa values and K for FeIII complexes of NA, DMA, and EDTA
| Chelator | pK1 | pK2 | pK3 | pK4 | KFeIII |
|---|---|---|---|---|---|
| EDTA | 9.85 (10.17) | 6.01 (6.11) | 2.93 (2.68) | 2.24 (2.00) | 25.2 (25.0) |
| DMA | 9.55 (10.00) | 7.78 (8.25) | 3.40 (3.19) | 2.72 | 18.1 (18.38) |
| NA | 10.09 (10.17) | 9.14 (9.14) | 6.92 (7.01) | 2.86 (2.20) | 20.6 |
Published values (where available) are in parentheses: Smith and Martell (1989) (DMA), Murakami et al. (1989) (NA), and Anderegg and Ripperger (1989) (EDTA).
