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Parameters for a droplet initially 10 µm in size containing 9 mg ml−1 NaCl, 3 mg ml−1 protein and 0.5 mg ml−1 surfactant.
| 100% RH | 90% RH | <64% RH | |
|---|---|---|---|
| equilibrium size | 10 µm | 2.8 µm | 1.9 µm |
| time to settle 1.5 m | 8 min | 102 min | 216 min |
| deposition efficiency in head airways | 81% | 73% | 57% |
| deposition efficiency in tracheobronchial region | 2% | 6% | 6% |
| deposition efficiency in alveolar region | 2% | 10% | 12% |
| concentration factor | 1 | 65 | >7000 |
