n |
Cobalt (μg/m3) | Tungsten (μg/m3) |
Nickel (μg/m3) | |||
Forming | P | 5 | 0.61–2.82 | 7.8–97.4 | 0.23–0.76 | |
S | 1 | 1.32 | 6.2 | 0.30 | ||
Pressing | P | 3 | 0.87–116.0 | 5.3–211.0 | 0.32–3.0 | |
Powder processing | P | 4 | 7.9–64.3 | 177.0–254.0 | 0.76–1.65 | |
Production of tungsten carbide | P | 1 | 0.39 | 19.1 | 0.40 | |
Sintering | P | 1 | 343.0 | 12.1 | 29.6 | |
S | 1 | 1.3 | 5.9 | 0.07 | ||
Grinding (wet) | P | 1 | 0.20 | 3.3 | 0.13 | |
Grinding (dry) | P | 1 | 0.48 | 81.3 | 0.31 | |
Heavy alloy production | P | 2 | 0.85–1.84 | 125.0–417.0 | 0.48–2.17 | |
S | 3 | 0.63–8.50 | 50.0–163.0 | 0.72–1.70 |
P=personal sampling; S=stationary sampling.