Potassium sorbate concentration (wt%) | Film thickness (mm) | D (×10−12 m2/s) | n |
0.2 | 0.072 ± 0.003 | 1.96 | 0.471 |
0.5 | 0.065 ± 0.001 | 2.87 | 0.440 |
1.0 | 0.068 ± 0.001 | 6.20 | 0.520 |