Estimation of Measurement Uncertainties for the DGT Passive Sampler Used for Determination of Copper in Water

Table 3

Uncertainty budget for showing relative uncertainties for the variables and the combined standard uncertainty.

Symbol	Source of uncertainty	Type*	Standard uncertainty	Distribution	Divisor	Relative uncertainty
	Estimated mass from ICP-MS analysis	A	g	Normal	1	0.008
	Recovery factor	B	0.0293	Rectangular		0.064
Uc (M)	Combined standard uncertainty	A	g	Normal		0.038

Note: type of uncertainty refers to types A and B, using standard vocabulary for statistically evaluated uncertainty (A) and uncertainty evaluated by other methods (B).