Title: Report on the 11th inter-laboratory comparison organised by the European Union Reference Laboratory for Polycyclic Aromatic Hydrocarbons - Four marker PAHs in spiked olive oil
Publisher: Publications Office of the European Union
Publication Year: 2013
JRC N°: JRC81648
ISBN: 978-92-79-30497-2
ISSN: 1831-9424
Other Identifiers: EUR 25999
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC81648
DOI: 10.2787/61833
Type: EUR - Scientific and Technical Research Reports
Abstract: The proficiency test here reported concerned the determination of the four marker polycyclic aromatic hydrocarbons (PAHs) in an olive oil test sample: benz[a]anthacene, benzo[a]pyrene, benzo[b]fluoranthene, and chrysene. Participants to these PT were National Reference Laboratories for PAHs (NRLs-PAHs) and EU official food control laboratories. The number of participants was 43. The PT was organised according to ISO Standard 17043:2010. The test material used was olive oil spiked with the target PAHs. Participants also received a solution of the PAHs either in an organic solvent for checking their instrument calibration. The results from participants were rated with z-scores and zeta-scores. About 94.4 % and 90.5 % of the results reported by NRLs and OCLs respectively were attributed with z-scores with an absolute value of below two, which is the threshold for satisfactory performance. The zeta-score ratings were worse, which indicates problems in the estimation of reliable measurement uncertainty values.
JRC Directorate:Health, Consumers and Reference Materials

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