Table 8.

The Uncertainty budget for available iodine of PVP-I solution.

Sources of uncertainty	Unit	Value (x)	Uncertainty (u(x))	Coverage Factor (k) (95% CI)	Relative Uncertainty (u(x)/x)
0.5% PVP-I solution
Balance	g	5	0.002	2	0.0002
V. Flask	mL	1000	0.24	2	0.00012
M. Cylinder	mL	167	0.36	2	0.0011
Burette	mL	0.05	0.0054	2	0.054
Homogeneity	%	0.0645	0.002	–	0.031
Stability	%	0.06	0.001	–	0.017
Repeatability	%	0.06	0.001	–	0.017
				Mean value	0.06
			Combined standard uncertainty		0.004
			Coverage factor (95% CI)		2
			Expanded uncertainty		0.01
0.6% PVP-I Solution
Balance	g	6	0.002	2	0.00017
V. Flask	mL	1000	0.24	2	0.00012
M. Cylinder	mL	167	0.36	2	0.0011
Burette	mL	0.1	0.0054	2	0.027
Homogeneity	%	0.0815	0.001	–	0.012
Stability	%	0.08	0.001	–	0.012
Repeatability	%	0.08	0.001	–	0.012
				Mean value	0.08
			Combined standard uncertainty		0.003
			Coverage factor (95% CI)		2
			Expanded uncertainty		0.01