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Abstract

Determination of measurement uncertainties in compliance with the GUM is demonstrated using the validation approach. Uncertainty was split into uncertainty of the sample mass, the concentration of the stock solution, the calibration and uncertainty connected to within- and between-series repeatability. Uncertainties of sample mass and of the concentration of the standard stock solution were negligible compared to the contributions of reproducibility and calibration. Uncertainty of calibration was estimated from the calibration graph. Reproducibility dominates combined uncertainty at higher concentrations. The results obtained from these calculations are compared to results for a CRM and to the performance in an inter-laboratory comparison.

Additional information

Authors: LINSINGER P.J, EC-JRC, Institute for Reference Materials and Measurements, Geel (BE);FUHRER M, Interuniversitõres Forschungsinstitut f³r Agrarbiotechnologie, Centre for Analytical Chemistry, Tulln (AT);KANDLER W, Interuniversitõres Forschungsinstitut f³r Agrarbiotechnologie, Centre for Analytical Chemistry, Tulln (AT);SCHUHMACHER R, Interuniversitõres Forschungsinstitut f³r Agrarbiotechnologie, Centre for Analytical Chemistry, Tulln (AT)
Bibliographic Reference: An article published in The Analyst (2001), vol.126, pp.211-216
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