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Challenges in Method Development for the Analysis of Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) in Foods
Friday, March 12, 2021: 3:35 PM - 4:10 PM
Speaker(s)
Description
The dietary exposure of perfluoroalkyl and polyfluoroalkyl substances (PFAS) through foods collected in the US has not been well characterized. Potential sources to the diet include contaminated water affecting agricultural products, livestock, and seafood, and migration from food contact materials. The FDA’s Total Diet Study (TDS) routinely monitors composite samples of table-ready highly consumed foods each year. Samples collected through this program in 2018 were used to develop a Quick, Easy, Cheap, Effective, Rugged, Safe (QuEChERS) extraction method for PFAS with analysis by liquid chromatography mass spectrometry. A total of 16 PFAS were analyzed in a variety of commodities including fruits, vegetables, milk, cheese, grains, meats and seafood. This method was used to analyze 179 TDS composite food samples collected in different regions of the country. During method development, challenges arose with matrix suppression, interferences, false positives, and method blanks. Investigations were also made into improving chromatography and additional clean-up steps. Results from the TDS samples will be presented along with method development and optimizations. This method will allow the FDA to continue monitoring PFAS compounds in the US food supply.
Track(s)
Additional Info
Keywords: Please select up to 4 keywords ONLY:
Food Science,Method Development
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