Table 1

Results of ambient monitoring of cobalt, nickel and tungsten in different workshops

		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
Forming		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
Sintering		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
Heavy alloy production		S	3	0.63–8.50	50.0–163.0	0.72–1.70