Title: IMEP-114: Determination of total Cd, Pb, As, Hg and Sn in feed premixes - Interlaboratory Comparison Report
Authors: FIAMEGKOS IOANNISCORDEIRO RAPOSO FernandoROBOUCH PiotrEMTEBORG PerCHAROUD-GOT JeanLEYS HANNEKORTSEN KONRAD BibiDE LA CALLE GUNTINAS Maria Beatriz
Publisher: Publications Office of the European Union
Publication Year: 2012
JRC N°: JRC78163
ISBN: 978-92-79-28003-0
ISSN: 1831-9424
Other Identifiers: EUR 25669
OPOCE LA-NA-25669-EN-N
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC78163
DOI: 10.2787/69771
Type: EUR - Scientific and Technical Research Reports
Abstract: This report presents the results of the proficiency test IMEP-114 of the EU-RL-HM which focused on the determination of total Cd, Pb, As, Hg and Sn in feed premixes in support to Directive 2002/32/EC of the European Parliament and of the Council on undesirable substances in animal feed. Thirty laboratories from 26 countries registered to the exercise of which 25 reported results for total As, 30 for total Cd, 29 for total Pb, 13 for total Hg and 9 for total Sn. Laboratories were asked to perform two or three independent measurements and to report the mean, the associated uncertainty, the coverage factor of the associated uncertainty and the technique used to perform the measurements. Laboratory results were rated using z- and ζ-scores (zeta-scores) in accordance with ISO 13528. The assigned values (Xref) for the measurands were determined as the mean of the values reported by two expert laboratories. The standard deviation for proficiency assessment (σˆ ), also called target standard deviation, was set to 15 % of the assigned value, for the analytes investigated. Between 60 and 90 % of the laboratories reported satisfactory results for total As and total Cd, and 50 % for total Pb. Only 3 participants reported satisfactory results for total Sn (out of 9 laboratories that reported values). Thirteen participants reported results for total Hg although, according to the expert laboratories the mass fraction for that measurand was below their limit of detection.
JRC Directorate:Health, Consumers and Reference Materials

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