Analysis of Per- and Polyfluorinated Substances (PFASs) in Eggs and Hen Food from Örebro County, Sweden

Sammanfattning: Perfluorinated alkyl substances (PFASs) have been used for various purposes for decades and have shown to have toxic properties. The main source of human exposure seems to be through the dietary where eggs, fish, meat and dairy products are the main sources. The aim of this study was to analyze both organic and conventional eggs and hen food for detection of PFASs and their precursors diPAPs. Samples from seven different egg productions where collected and the PFASs were extracted by solid phase extraction (SPE). Ultra performance liquid chromatography and tandem mass spectrometry (UPLC-MS/MS) was used for analysis. The results showed that the eggs contained more and other homologues of PFASs than the hen food, indicating that there are more sources of ingestion of PFASs than the hen food. PFOS and PFUnDA could be more frequently detected in organic hen food and egg samples than in conventional hen food and egg samples, which could be due to the content of fish meal in organic hen food. However, the recovery of the internal standards was below 20% for several of the egg samples. 6:2 FTSA and PFBS were detected in the egg samples which they do not seem to have been in earlier studies. The production of PFBS has increased in later years, as it replaces PFOS. None of the diPAPs could be detected in the hen food sample whilst several were found in the egg samples.