Title: IMEP-23: The Eight WFD PAHs in Water in Presence of Humic Acid
Authors: VAN DE KREEKE JOHANNESDE LA CALLE GUNTINAS MARIA BEATRIZBYNENS SASKIAVERBIST INGETAYLOR PHILIPBERCARU OFELIARICCI MARINASEJEROE-OLSEN BERITSHEGUNOVA PENKABAU' ANDREA
Publisher: OPOCE
Publication Year: 2008
JRC N°: JRC44145
ISBN: 978-92-79-08709-7
ISSN: 1018-5593
Other Identifiers: EUR 23287 EN
OPOCE LA-NA-23287-EN-C
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC44145
DOI: 10.2787/39014
Type: EUR - Scientific and Technical Research Reports
Abstract: IMEP-23 is linked to the Water Framework Directive (WFD). It studied the capability of control laboratories to measure the eight WFD PAHs in the presence of humic acid in a water matrix. Humic acid simulates natural colloidal organic matter and is known to adsorb PAHs. This gives rise to various issues that are of large importance for the control laboratories. Participants' results were benchmarked against the IMEP certified reference values. On average 80 % of the z scores was satisfactory. Zeta scores were calculated for those laboratories who provided an uncertainty estimate. These were less satisfactory and this shows that many laboratories encounter difficulties to provide a reasonable uncertainty estimate.
JRC Institute:Institute for Reference Materials and Measurements

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