Title: Proficiency Test on the Determination of Acrylamide in Potato Crisps
Publisher: OPOCE
Publication Year: 2008
JRC N°: JRC43949
ISBN: 978-92-79-08581-9
ISSN: 1018-5593
Other Identifiers: EUR 23276 EN
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC43949
DOI: 10.2787/36693
Type: EUR - Scientific and Technical Research Reports
Abstract: The Institute for Reference Materials and Measurements (IRMM) of the European Commission¿s Joint Research Centre (JRC) was requested by the Directorate General Health and Consumer Protection (DG SANCO) to organise a proficiency test on the determination of acrylamide in potato products in 2007. The aim of this test was to support the implementation of the acrylamide monitoring Recommendation 2007/331/EC. The organisation of the study as well as the evaluation of the results was done in accordance with ¿The International Harmonised Protocol for the Proficiency Testing of Analytical Chemistry Laboratories¿. The potato crisps used for the preparation of the test material was produced in a pilot plant of the German Federal Research Centre for Nutrition and Food (Detmold, Germany). The study was free of charge for the participants. Altogether forty two laboratories from 16 EU Member States subscribed for participation in the study. The participants were asked to determine the acrylamide content in the test sample by application of their usual in-house analysis methods. The laboratories were requested to report the results via a web-interface into a secured databank. In total, 36 result data sets were reported to the organisers of the study. Details regarding the applied analytical methods were requested from the participants. Thirty one participants filled in and returned the questionnaire with the method details back to the organisers. An assigned value for the acrylamide content of the test material was established by an isotope dilution HPLC-MS/MS method. The target standard deviation was calculated according to a proposal of Thompson, which applies a concentration dependent modification of the Horwitz equation. The performance of laboratories was expressed by the z-score. They are considered satisfactory if the values of |z| = 2. Twelve laboratories of 36 (33.3%) reported results |z| >2. The percentage of successful laboratories is lower in comparison to previous proficiency tests organised by IRMM as well as to the last FAPAS® round. Reasons for this might be a more complex food matrix and/or the application of improper methods. However, the study showed the importance of continuous participation in proficiency testing schemes in order to achieve comparability of results.
JRC Directorate:Health, Consumers and Reference Materials

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