Title: Isotope Dilution with ICP-MS - Simplified Uncertainty Estimation using a Robust Procedure Based on a Higher Target Value of Uncertainty
Authors: MAGNUSSON BertilTRESL IVANHARALDSSON Conny
Citation: JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY vol. 20 p. 1024-1029
Publisher: ROYAL SOC CHEMISTRY
Publication Year: 2005
JRC N°: JRC32122
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC32122
Type: Articles in Journals
Abstract: The paper describes an a priori simuation process of the uncertainty that will be achieved using a validated procedure for an analyte in a matrix. for this, a valid model equation is built, where the different influence quantities are allowed to vary within a wide robust tolerance window. For these influence quantities an approximate measurement uncertainty contribution relative to the measured (i.e. quantity to be measured) is calculated and only those that significantly affect the measurement uncertainty (expanded k = 2, relative) at the target level are taken into account. A target value of uncertainty of 2% is used here as an example since it is deemed to be achievable by experienced laboratories that are not primarily concerned with measuring at a lower uncertainty level. The approach is demonstrated on the determination of nickel in low-alloy steel and copper in fresh water. However this basic approach using target uncertainty and wide tolerance windows is general and can easily be adapted for other applications.
JRC Institute:Institute for Reference Materials and Measurements

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.