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Report of the Eighth Interlaboratory Comparison organised by the Community Reference Laboratory for Heavy Metals in Feed and Food - Total Cd, Pb, As, Hg and Sn and extractable Cd and Pb in Feed of Plant Origin
| Content Provider | Semantic Scholar |
|---|---|
| Author | Beatriz, De La Calle Guntinas Maria Agnieszka, Krata Christophe, Quetel Thomas, Linsinger Elzbieta, Perez Przyk Inge, Verbist |
| Copyright Year | 2010 |
| Abstract | 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 (CRL-HM). One of its core tasks is to organise interlaboratory comparisons (ILCs) among appointed National Reference Laboratories (NRLs). This report presents the results of the eighth ILC of the CRL-HM which focused on the determination of total Cd, Pb, As, Hg and Sn and extractable amounts of Cd and Pb in feed of plant origin following 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 candidate reference material, the matrix being rye grass. The material was relabelled and dispatched to the participants on the second half of October 2009. Each participant received approximately 10 g of test material. Thirty participants from 25 member states registered to the exercise of which 27 reported results for total Cd, Pb and Hg, 23 for extractable Pb, 22 for extractable Cd and for total As and 16 for total Sn. One laboratory did not report results due to a breakdown of the instrumentation, and one laboratory reported results only for Hg for the same reason. The assigned values (Xref) for total Cd, Pb, As, Hg and Sn were the candidate certified values as obtained during the certification. The assigned values for extractable Cd and Pb were provided by IRMM using isotope dilution-inductively coupled plasma-mass spectrometry (ID-ICP-MS). Participants were invited to report the uncertainty of their measurements, which was provided by the majority of them. The laboratory performance was evaluated using zand zeta-scores in accordance with ISO 13528. The standard deviation for proficiency assessment (also called target standard deviation), σ̂ , was fixed to 15 % of the assigned values for all measurands on the basis of the outcome of previous ILCs organised by the CRL-HM for the same population. Between 85 and 95 % of the laboratories performed to a satisfactory level taking into consideration the z-scores for total and extractable Cd and Pb. The figures are not equally positive for the same measurands when looking at the zeta-scores only. 65 to 69 % of the reported results were satisfactory when the associated uncertainties are taken into account. How to obtain EU publications Our priced publications are available from EU Bookshop (http://bookshop.europa.eu), where you can place an order with the sales agent of your choice. The Publications Office has a worldwide network of sales agents. You can obtain their contact details by sending a fax to (352) 29 29-42758. The mission of the JRC is to provide customer-driven scientific and technical support for the conception, development, implementation and monitoring of EU policies. As a service of the European Commission, the JRC functions as a reference centre of science and technology for the Union. Close to the policy-making process, it serves the common interest of the Member States, while being independent of special interests, whether private or national. LA N A -2478-EN -C |
| File Format | PDF HTM / HTML |
| DOI | 10.2787/24640 |
| Alternate Webpage(s) | https://ec.europa.eu/jrc/sites/jrcsh/files/eur24278en.pdf |
| Alternate Webpage(s) | http://publications.jrc.ec.europa.eu/repository/bitstream/111111111/13583/1/eur24278en.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
