Report of the fifth interlaboratory comparison - Total Cd, Pb and As, and extractable Cd and Pb in mineral feedFunded under: FP7-KBBE
The Institute for Reference Materials and Measurements (IRMM) of the Joint Research Centre, a Directorate-General of the European Commission, operates the Community Reference Laboratory for Heavy Metals in Feed and Food. One of its core tasks is to organise interlaboratory comparisons among appointed National Reference Laboratories. This report presents the results of the fifth ILC of the CRL-HM which focused on the determination of total Cd, Pb and As and extractable Cd and Pb in mineral feed according to Directive 2002/32/EC of the European Parliament and of the Council on undesirable substances in animal feed. The test material used in this exercise was a commercial mineral feed for piglets provided by AGES, Zentrum Analytik und Mikrobiologie, in Austria. The material, naturally contaminated, was processed, bottled, labelled and dispatched by the Reference Materials Unit of the IRMM. The samples were dispatched on the second half of October 2008. Each participant received one bottle containing approximately 30 g of test material. Thirty-one participants from 25 countries registered to the exercise of which 28 submitted results for total Cd and for total Pb, 22 submitted results for total As and 27 submitted results for extractable Cd and for extractable Pb. Tow laboratories did not submit results due to a break down in the instruments that were to be used for the analyses. The assigned values (Xref) for total and extractable Cd and Pb were provided by IRMM using isotope dilution-inductively coupled plasma-mass spectrometry. The analytical uncertainty of Xref, uchar, was calculated according to the ISO Guide to the Expression of Uncertainty in Measurement. The assigned value for total arsenic was provided by the Studiecentrum voor Kernenergie using neutron activation analysis. The analytical uncertainty of Xref, uchar, for total arsenic was calculated according to GUM and was based on the spreadsheet technique developed by Kragten.
Bibliographic Reference: EUR 23711 EN (2009), 46 pp. Free of charge
Availability: http://bookshop.europa.eu/is-bin/INTERSHOP.enfinity/WFS/EU-Bookshop-Site/en_GB/-/EUR/ViewPublication-Start?PublicationKey=LANA23711 (Catalogue Number: LA-NA-23711-EN-C)
ISBN: ISBN: 978-92-79-11274-4
Record Number: 200910264 / Last updated on: 2009-09-22
Original language: en
Available languages: en