Concentrations of α-amylase in area samples with values above the detection limit in the animal feed industry
| Sampling area | Concentration of α-amylase (ng/m3) | Corresponding concentration of total dust (mg/m3) | |
| Factory 1 | Loading of feed | 20 | 2.5 |
| Factory 2 | Bagging | 90 | 1.7 |
| Factory 3 | Next to enzyme doser | 50 | 0.6 |
| Factory 3 | Next to enzyme doser | 30 | 1.1 |
| Factory 3 | Process | 200 | 7.8 |
| Factory 3 | Process | 200 | 4.5 |
| Factory 4 | Bagging | 20 | 2.5 |
| Factory 4 | Bagging (big sacks) | 70 | 18 |