This report presents the results of the ILC of the EURL-FCM, which focused on the quantification of Primary Aromatic Amines (PAAs) in migration solutions of 3% acetic acid from food contact materials. In particular the exercise was focused on the determination of the aniline, 4,4 MDA, 2,4 TDA and 2,6 TDA. The test material used for preparation of the migration solutions were polyamide kitchenware containing PAAs. The homogeneity and stability studies were performed by the NRL UK laboratory and statistically elaborated from the EURL-FCM. Two concentration levels of migration solutions were distributed to the NRLs. The general aim of the exercise was to assess the performance of the official control laboratories and consequently the participants were free to use any analytical method of their choice. Participants were invited to report 4 results for each concentration level. There were 29 participants to whom samples were dispatched (EURL, 27 NRLs + 1 guest from Belgium) and 27 of which submitted results. 24 laboratories submitted results obtained using the chromatographic methods, 3 laboratories reported their results only as equivalent of aniline/kg using the spectrophotometric method. The assigned values were obtained after applying the robust statistics to the results of the participants. Standard deviations for proficiency assessment (also called target standard deviations) were set based on Horwitz equation. The ILC showed that the participation in the ILC was satisfactory regarding the number of the participating laboratories.For the first concentration level PAAs1 for aniline 87.5 % of the results were satisfactory, 8.3 % were questionable and 4.2 % were unsatisfactory; for 4,4-MDA 91.3 % of the results were satisfactory and 8.7 % were questionable; for 2,4-TDA 90.5 % of the results were satisfactory and 9.5 % were questionable. For the second concentration level PAAs2 for aniline 100 % of the results were satisfactory; for 4,4-MDA 91.3 % of the results were satisfactory and 8.7 % were unsatisfactory; for 2,4-TDA 95.2 % of the results were satisfactory and 4.8 % were questionable; for 2,6-TDA 88.2 % of the results were satisfactory, 5.9 % were questionable and 5.9 % were unsatisfactory.

BELDI Giorgia;  JAKUBOWSKA Natalia;  BRADLEY Emma;  SIMONEAU Catherine; 

2013-01-11

Publications Office of the European Union

JRC77620

978-92-79-28084-9,   

1831-9424,   

EUR 25685,    OP LB-NA-25685-EN-N,   

https://publications.jrc.ec.europa.eu/repository/handle/JRC77620,   

10.2788/77260,