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Analysis of Per- and Polyfluorinated Substances (PFASs) in Eggs and Hen Food from Örebro County, Sweden
Örebro University, School of Science and Technology.
2015 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

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.

Abstract [sv]

Perfluorerade alkylsubstanser (PFAS) har använts för olika ändamål i årtionden och har visat sig vara giftiga. Huvudkällan för mänsklig exponering verkar vara genom maten där ägg, fisk, kött och mjölkprodukter är de största källorna. Målet för den här studien var att analysera både ekologiska och konventionella ägg och hönsfoder för detektion av PFAS och dess föregångare diPAPs. Prover samlades från sju olika äggproduktioner och PFAS extraherades med solid phase extraction (SPE). Ultra performance liquid chromatography och tandem mass spectrometry (UPLC-MS/MS) användes för analyserna. Resultaten visade att äggen innehöll fler och andra PFAS homologer än hönsfodret, vilket indikerar att det fanns fler källor för intag än genom fodret. PFOS och PFUnDA kunde detekteras mer frekvent i ekologiska ägg- och hönsfoderprover än i konventionella ägg- och hönsfoderprover vilket kan bero på innehållet av fiskmjöl i ekologiskt hönsfoder. Dock var utbytet för internstandarderna under 20 % i många av äggproverna. 6:2 FTSA och PFBS detekterades i äggproverna vilket de inte verkar ha gjort i tidigare studier. Produktionen av PFBS har ökat på senare år då det ersätter PFOS. diPAPs kunde inte hittas i något av foderproverna medan flera hittades i äggproverna.

Place, publisher, year, edition, pages
2015.
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:oru:diva-45767OAI: oai:DiVA.org:oru-45767DiVA: diva2:852569
Subject / course
Chemistry
Supervisors
Examiners
Available from: 2015-09-09 Created: 2015-09-09 Last updated: 2017-10-17Bibliographically approved

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