Table 2.
Exposure to carbon nanotubes expressed as mass concentrations [µg/m3] for the three selected work events (WEs), characterized by means of different measurement techniques (MTs). The data are presented as mean and standard deviation (GSD). Note: n.a. = not available.
| MTs | WEs | Exposure [µg/m3] | |
|---|---|---|---|
| Mean | SD | ||
| MT1 | WE1 | 0.83 | 0.18 |
| WE2 | 1.0 | 0.07 | |
| WE3 | 1.2 | 0.12 | |
| WH | 1.2 | 0.32 | |
| NWH | 0.92 | 0.31 | |
| MT2 | WE1 | 3.4 | 22 |
| WE2 | 25 | 3.80 | |
| WE3 | 6.1 | 12.0 | |
| WH | 6.7 | 22.0 | |
| NWH | 4.5 | 6 | |
| MT3 | WE1 | 0.81 | 0.82 |
| WE2 | 1.7 | 0.69 | |
| WE3 | n.a. | n.a. | |
| WH | 1.5 | 5.7 | |
| NWH | 0.42 | 0.21 | |