Table 1.

Inhalation exposure to silver nanoparticles (μg/m³)

Ag concentration
	Sample no	Pump flow rate (L/min)	Sampling time (min)	Ag conc (μg/m3)	MOE	MOEa
1st day	Exp 1	1.98	180	0.02	7600	38,000
	Exp 2	2.00	180	0.02
	Exp 3	1.92	180	0.02
	Exp 4	2.00	180	0.01
2nd day	Exp 1	1.94	180	0.01	13,300	66,500
	Exp 2	1.91	180	0.01
	Exp 3	2.01	180	0.01
	Exp 4	2.00	180	0.01
3rd day	Exp 1	1.97	180	0.01	10,640	53,200
	Exp 2	1.93	180	0.01
	Exp 3	2.07	180	0.01
	Exp 4	2.01	180	0.02
Work placeb	Personal 1	0.953	123	0.00024	554,166	2,770,833

MOE NOAEL/Exposure concentration, MOE ^a with use of personal protective equipment, 80 % reduction in inhalation exposure, NOAEL 133 μg/m³ Sung et al. [6]

^bData obtained from Lee et al. [3]