Poster 171 – Click on poster below to view presentation from author.
University of Nebraska-Lincoln, Water Sciences Laboratory
Co-Authors: Daniel Snow, Tiffany Messer, Shannon Bartelt-Hunt
Per- and polyfluoroalkyl substances (PFASs) are an environmentally persistent contaminant detected globally in the environment and associated with a variety of human health impacts due to their carcinogenic nature. With the advancement of analytical technology, the ability to detect PFAS compounds in environmental samples at lower concentrations continues to develop. However, current scientific communication on the proper procedural methods necessary to provide accurate extraction, elution, and analysis of environmental samples is lacking. Thus, slowing down further scientific research in this sector. The aim of this study was to develop laboratory methodologies to extract, elute, and examine a total of 18 PFAS compounds from non-potable runoff water and polar organic chemically integrative samplers (POCIS) exposed to wastewater. Despite an exponential increase in recent years of literature pertaining to examining PFASs within the environment, there are currently few available protocols actively describing how to extract and elute PFASs from non-potable water and wastewater using POCIS. A major challenge in this project included PFASs being found within a variety of current laboratory equipment and chemicals leading to potential internal contamination. During the study two sample types (grab samples and POCIS) were collected during agricultural runoff events and at the inflow and outflow of a wastewater treatment plant in the Midwest. We determined equipment settings, materials, chemicals, extraction solutions, reagents, calibration standards, and procedures necessary to extract and elute PFASs to be analyzed on a Waters Xevo TQS triple quadrupole mass spectrometer. The methodology is anticipated to provide a more efficient and accurate method for evaluating PFASs in the natural environment and expand the methods to a multitude of environmental matrixes.
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