Table 3.
pKa and the fraction of protonated nitrogen in PEI molecule calculated from the model proposed by Suh et al. (19)
| pH 6 | pH 7 | pH 8 | pH 9 | |
|---|---|---|---|---|
| pKa | 5.95 | 6.69 | 7.43 | 8.17 |
| Fraction of N+ (%) | 47 | 33 | 21 | 13 |
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