Title: IMEP-25b: Determination of Bromate in Drinking Water - Interlaboratory Comparison Report
Authors: CORDEIRO RAPOSO FernandoSCHMITZ FranzEMTEBORG PerCHAROUD-GOT JeanCONTRERAS LOPEZ Maria ConcepcionVERBIST IngeTAYLOR PhilipDE LA CALLE GUNTINAS Maria Beatriz
Publisher: Publications Office of the European Union
Publication Year: 2009
JRC Publication N°: JRC56238
ISBN: 978-92-79-14684-8
ISSN: 1018-5593
Other Identifiers: EUR 24136 EN
OPOCE LA-NA-24136-EN-C
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC56238
DOI: 10.2787/22213
Type: EUR - Scientific and Technical Research Reports
Abstract: The Institute for Reference Materials and Measurements (IRMM) of the Joint Research Centre (JRC), a Directorate-General of the European Commission, operates the International Measurement Evaluation Programme (IMEP). IMEP organises interlaboratory comparisons (ILC's) in support to EU policies. This ILC exercise reports the performance of the laboratories on the determination of bromate in drinking water in support to the Council Directive 98/83/EC (Drinking Water Directive, DWD). Seven test materials were included in this study: soft drinking water, hard drinking water, mineral water, swimming pool water, raw water (untreated), a bromate standard solution and a blank solution consisting of non-spiked ultra pure water. The bottles containing the blank solution were labelled as river water. The 25 participating laboratories were invited via the IRMM website and the European Co-operation for Accreditation. z scores were calculated with a target standard deviation of 25 % of the reference value. The scores were satisfactory for a high share of the participants (75 % for soft drinking water, 90 % for hard drinking water, 73 % for mineral water, 100 % for swimming pool water, 86 % for raw water and bromate standard solution, respectively). In addition, zeta scores were calcu-lated for participants having reported a measurement uncertainty. These were however, less satisfactory on average. In summary, the measurement capabilities of laboratories involved in the determination of bromate measurements in the frame of the DWD is satisfactory considering that the concen-tration levels in almost all matrices were lower or equal to the maximum level of bromate in these types of matrices.
JRC Institute:Institute for Reference Materials and Measurements

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