Overview of Air Pollution Assessment in Northern Europe (Lithuania) by Passive Diffusion Sampling

Table 4

Uncertainty estimation according to GUM.

Component		Limit value (μg m^−3)	Uncertainty combined	Uncertainty expanded	Umean
NO2	Annual mean	40	10.8	21.6	7.7
	UAT	32	10.2	9.9	7.3
	LAT	26	20.5	19.7	7
SO2	Annual mean	20	11	22.1	7.8
	UAT	12	13.1	26.2	9.3
	LAT	8	16.7	33.5	11.9
C6H6	Annual mean	5	14.1	28.2	10
	UAT	3.5	17.3	34.6	14.1
	LAT	2	26.6	53.3	18.9