Category Archives: PFAS

US DoD and EPA Update on PFAS Methods

The annual DoD EMDQ Workshop, usually a source of great information and networking, was cancelled this year. To cover updates that would have been discussed at the workshop, the DoD team hosted an informative webinar on multiple topics. Highlighted below are some PFAS methods updates from Janice Willey’s May 19 presentation. The PFAS Isotope Dilution […]

US DoD Update on PFAS Methods

The annual DoD EMDQ Workshop, usually a source of great information and networking, was cancelled this year.To cover updates that would have been discussed at the workshop, the DoD team hosted an informative webinar on multiple topics. Highlighted below are some PFAS methods updates from Janice Willey’s May 19 presentation. The PFAS Isotope Dilution Method […]

Extracting Cationic and Zwitterionic PFAS from AFFF-Contaminated Soils

Image of soil

The PFAS on the regulatory radar, such as PFOS, PFOA, and other related targets on typical laboratory lists, are anionic, or neutral. Therefore, the methods are optimized for anionic PFAS and feature standardized solid extraction using methanol containing ammonia, and weak anion exchange cleanup. However, many aqueous film forming foam (AFFF) active ingredients can be […]

How does PFAS contamination affect microbial communities?

The widespread use of aqueous film forming foams (AFFF) containing PFAS at airports all over the world has resulted in contamination of ground and surface water, and soil. In addition to the many ecosystem effects that are still being studied, how are microbial communities affected? Which PFAS are microbes able to degrade and how does […]

Bile Acids Interferences in PFAS Analysis

Bile acids structure and name

Can bile acids found in plasma, eggs, liver and other biological samples interfere with PFAS analysis? Yes! But there are ways to avoid these interferences and produce reliable data. Bile acids and their salts are either synthesized in the liver or formed from bacterial activity. They are the major constituents of bile and help digest […]

SGS AXYS Scientists Publish Timely Study on PFAS Storage Stability

While perfluorinated carboxylates and sulfonates (PFAA) such as PFOA and PFOS are known to be stable under all storage/environmental conditions, it is well known that many other PFAS, including PFAA precursors can transform in the environment from biological and chemical processes. But little was known about their stability in environmental samples sent to laboratory and […]