Understanding PFAS: Key Technologies for PFAS Detection and Monitoring

Understanding their health impacts Identifying unknown PFAS compounds Developing cost-effective removal strategies Key technologies for PFAS detection PFAS have strong carbon–fluorine bonds and exceedingly low regulatory limits, necessitating the use of highly sensitive and accurate detection methods capable of measuring trace concentrations in complex matrices. Current research is focusing on: Collaborative efforts between governments, industry, and researchers aim to: Reduce environmental release Prevent exposure Move toward safer alternatives Their presence in the environment poses health risks to humans due to their: Landfill leachate Industrial discharges Biosolids used as farm fertilizer Firefighting foams from airports Wastewater treatment plants Bioaccumulation in foods Presence in water sources Where do PFAS come from? PFAS are used in a wide range of industrial and consumer products, such as firefighting foams, nonstick cookware, and food packaging. They enter the water, soil, and air through: Monitoring strategies and regulations Effective PFAS monitoring combines targeted sampling with long-term surveillance to track trends in contamination. Ongoing monitoring supports risk assessment, regulatory compliance, and evaluation of remediation effectiveness over time. EPA methods: • 533, 537 and 537.1 for drinking water. • 8327 and 1633 for surface water, groundwater, and wastewater matrices. • 1633 also for sediment, soil, biosolids, landfill leachate, and fish tissue. ASTM International methods: • D7968 for soil. • D8421 for aqueous matrices. ISO standards: • ISO 25101 for drinking water, groundwater and surface water, also commonly adapted for sludge, water, soil, and sediment. CONVENTIONAL EMERGING LC-MS/MS Highly accurate PFAS detection with parts per trillion (ppt) sensitivity. Cons: expensive, slow, and requires specialized equipment and expertise. Colorimetric assays Simple, low-cost visual tests based on color changes. Cons: lower sensitivity. Fluorescence and luminescence detection More sensitive than colorimetric assays using PFAS-binding fluorescent materials. Cons: below regulatory detection limits. Electrochemical methods Portable with low-ppt sensitivity. Cons: prone to interference from complex environmental samples. Photoelectrochemical sensor Combines light and electrochemical detection for enhanced sensitivity. A promising technique and potentially compatible with PFAS degradation systems. Semi-quantitative assays Total oxidizable precursor (TOP) and total organic fluorine (TOF) capture PFAS precursors and unknown PFAS that targeted methods miss. Cons: lower sensitivity and requires expert handling. Improved detection methods Comprehensive regulatory frameworks Innovative remediation technologies Future directions Advancing PFAS management will rely on: Further research is needed to develop new materials and improve detection mechanisms before these methods can be widely deployed. PFAS contamination presents a major environmental and public health challenge due to their persistence, widespread sources, and potential toxicity. While conventional LC-MS/MS remains the most reliable detection method, emerging technologies offer promising portable and cost-effective alternatives. Continued innovation in monitoring, remediation, and regulation is essential to reduce PFAS exposure and protect global ecosystems and communities. Routine monitoring is conducted on drinking water, surface water, groundwater, soil, and biota. Sponsored by: Per- and polyfluoroalkyl substances (PFAS) are a group of synthetic chemicals that are widely used in industrial and consumer products; however, their environmental persistence and potential health impacts have raised growing concern. Effective PFAS detection and monitoring are essential for understanding their distribution in the environment and supporting regulatory decision making. This infographic will highlight key analytical technologies for PFAS detection and monitoring, as well as the current major challenges in regulation and remediation. PFAS contamination Time PFAS contamination Many compounds $ Detection limits Costly remediation Safe environment Unknown toxicity PFAS management bottleneck Managing PFAS contamination is complicated by the large number of known and unknown PFAS compounds, evolving regulatory standards, and limitations in analytical methods . Written by Laura Hemmingham A F S P Key Technologies for PFAS Detection and Monitoring UNDERSTANDING