Title: Estimation of Measurement Uncertainty in Organic Analysis - Two Practical Approaches
Authors: SHEGUNOVA PENKABERCARU OFELIASEJEROE-OLSEN BERIT
Citation: ACCREDITATION AND QUALITY ASSURANCE vol. 13 p. 11-18
Publisher: SPRINGER
Publication Year: 2008
JRC N°: JRC38125
ISSN: 0949-1775
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC38125
DOI: 10.1007/s00769-007-0322-1
Type: Articles in periodicals and books
Abstract: Estimation of measurement uncertainty has become a more regularly performed part of the whole analytical process. However, there is still a lot of on-going discussion in th scientific community about the ways to build up the uncertainty budget. This study describes two approaches for the estimation of measurement uncertainty in organic analysis: one which can be used for single sets of measurements and the other one based on validation studies. In both cases the main contributions to the uncertainty are presented and discussed for the analysis of PCBs in mussel tissue, but the approaches can be extended for other organic pollutants in environmental/food samples. The main contributions to the uncertainty budget arise from calibration, sample preparation and GC-MS measurements. A comparison of the relevant sources and their contributiona to the expanded uncertainty is presented.
JRC Directorate:Health, Consumers and Reference Materials

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