Report on the 13th inter-laboratory comparison organised by the European Union Reference Laboratory for Polycyclic Aromatic Hydrocarbons - Four marker PAHs in spiked olive oil
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 36. 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 % and 88 % 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.
BRATINOVA Stefanka;
ZELINKOVA Zuzana;
KARASEK Lubomir;
WENZL Thomas;
2014-01-22
Publications Office of the European Union
JRC87021
978-92-79-34940-9,
1831-9424,
EUR 26401,
OP LA-NA-26401-EN-N,
https://publications.jrc.ec.europa.eu/repository/handle/JRC87021,
10.2787/84377,
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