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Ultra-high Performance Liquid Chromatography Tandem Mass Spectrometry for Detection and Quantitation of Per- and Polyfluoroalkyl Substances (PFAS) in Sediments Collected from Pensacola, FL
Tuesday, March 09, 2021: 1:50 PM - 2:10 PM
Speaker(s)
Description
Per- and polyfluoroalkyl substances (PFAS) are anthropogenic chemicals widely used in industrial and consumer products. In the present study, sediment samples were collected from eight different locations in Pensacola Bay area in winter 2019 to determine the presence and concentration of PFAS. Isotope dilution was used to monitor 51 PFAS using ultra high-performance liquid chromatography tandem mass spectrometry and selected reaction monitoring. Twenty-three PFAS were quantified in the sediment samples, of which 5 were detected in all sites. including perfluorobutane sulfonic acid (PFBS), perfluorooctane sulfonic acid (PFOS), perfluorobutanoic acid (PFBA), perfluorooctanoic acid (PFOA), and perfluorodecanoic acid (PFDA). Furthermore, perfluoroalkylated (PFAA) precursors such as 2-(N-ethylperfluorooctanesulfonamido) acetic acid (N-EtFOSAA) and perfluorooctane sulfonamido acetic acid (FOSAA), bis-[2-(N-ethyl perfluorooctane-1-sulfonamido) ethyl] phosphoric acid ester (diSAmPAP), were also present in some sediments with sub ng g-1 levels. The total concentration of PFAS (ΣPFAS) in sediments ranged from 0.22 to 8.6 ng g-1 dry weight. PFBS and PFOS were the dominant species in sediment, accounting for 13% and 26% of ΣPFAS, respectively. As a quality control procedure, we analyzed National Institute of Standards and Technology Standard Reference Material 1944 (SRM 1944, New Jersey Water Way Sediment). Although NIST does not have certified PFAS values for this material, our data were in good agreement with values reported for this material by other groups.
The performance of the analytical method used for the analysis of PFAS in sediment, was characterized through the estimation of linearity of the calibration curve, extraction recoveries, accuracy and matrix effects. The obtained results showed high recovery (in the range of 76%-120%) and good accuracy (46/51 monitored PFAS showed percentage of relative error ≤ ±20%). Source of funding: UF CVM startup (JAB)
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Additional Info
Keywords: Please select up to 4 keywords ONLY:
Chromatography - Other,Contamination,Environmental - Soils, Hazardous Waste
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