Characterization and Uncertainty Assessment of a Certified Reference Material of Chloramphenicol in Methanol (GBW(E)082557)

Table 7

Results of uncertainty.

Items	Assessment and calculation	Results
	() variability of balance measurement (empirical estimation)	0.41%
	() uncertainty of balance calibration (metrological verification certificate)
	() error of volumetric flask (metrological verification certificate)	0.35%
	() random error (empirical estimation)
	() variation with temperature (calculation)
		0.28%
		0.61%
		0.23%
&	&	0.56%  &  0.41%
		0.94%
	; (, 95% confidence level)	2 mg/L