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Model parameters for the Frumkin adsorption isotherm obtained when fitting the drop profile analysis data without taking the depletion effects into account; in parenthesis are the parameter values obtained with consideration of the depletion effects in the single drop
| Surfactant | ω 0, 105 m2 mol | b, m3 mol−1 | a | ε, 10−3 m mN−1 |
|---|---|---|---|---|
| C10EO8 | 3.0 (4.0) | 260 (350) | 0.3 (0.2) | 3 (9) |
| C12EO5 | 2.0 (3.5) | 275 (16,000) | 1.2 (−0.9) | 3 (5) |
| C14EO8 | 1.8 (3.0) | 190 (90,000) | 1.8 (−4.7) | 3 (6) |
