Title: Report on the 2012 Proficiency Test on pyrrolizidine alkaloids in honey and hay
Authors: TAMOSIUNAS VYTAUTASMISCHKE CarstenMULDER Patrick P JSTROKA Joerg
Publisher: Publications Office of the European Union
Publication Year: 2013
JRC N°: JRC85378
ISBN: 978-92-79-33877-9
ISSN: 1831-9424
Other Identifiers: EUR 26235
OPOCE LA-NA-26235-EN-N
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC85378
DOI: 10.2787/83856
Type: EUR - Scientific and Technical Research Reports
Abstract: The purpose of this proficiency test was to investigate the current measurement capacities of testing laboratories for pyrrolizidine alkaloids in honey and plant materials. The scheme consisted of two parts: Benchmarking performance of laboratories against known estimates of pyrrolizidine alkaloids in the samples and checking for methodological differences while measuring naturally contaminated materials. Twenty-eight laboratories expressed their will to participate and analysed multiple analytes in several test samples of honey and plant material. The analysis of spiked honey showed no statistical differences between determining a common sum parameter for alkaloids and individual determination. A significant difference has been found however for of naturally contaminated materials. Individual alkaloid determination showed significantly lower results, possibly because of the presence of substances contributing to the sum parameter that were not in the scopes of the methods applied as well as lack of standard materials available on the market. Satisfactory performance for all of analytes has been achieved by more than half of participants analysing for both: sum parameter, and alkaloids analysed individually.
JRC Directorate:Health, Consumers and Reference Materials

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