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Telling the PFAS story with pine needles

As an ever-expanding group of chemicals, per- and polyfluoroalkyl substances (PFAS) require novel techniques to monitor their current and historical presence in the environment. Concerns over exposure to PFAS chemicals continue to grow, with some having known toxic characteristics and the potential effects of others remaining unknown.1 In addition, while PFAS are one of the most persistent synthetic chemicals to date, most of them hardly degrade in the environment.2 So, how long do traces of PFAS last in our environment? Two tools used to help answer this question are active samplers and passive samplers.

The hidden ingredient in anti-fog sprays: PFAS

A recent study led by researchers from Duke University, conducted with colleagues from Wayne State University and the University of North Carolina at Charlotte, found that four of the top-rated anti-fog sprays contained up to 20.7 milligrams of per- and polyfluoroalkyl substances (PFAS) per milliliter of solution. This study has received a lot of exposure in popular media, and it should not be overlooked. The researchers used several creative approaches to obtain a comprehensive characterization of the anti-fog sprays, including using total organic fluorine measurements, GC-MS methods and both nominal mass and accurate mass instruments. A unique finding of the study was the detection of fluorotelomer ethoxylates (FTEOs), which are relatively unknown PFAS compounds.

Previously unknown group of PFAS compounds detected near Solvay manufacturing site in New Jersey

In a recent PFAS fireside chat, Dr. John Washington from the US EPA discussed the findings of a recent study published in Science that detected a novel group of per- and polyfluoroalkyl substances (PFAS)—called chloroperfluoropolyether carboxylates (ClPFPECAs)—in soil samples from New Jersey. The study, conducted by Dr. Washington and his colleagues, detected 10 unique ClPFPECAs in these samples, with the highest concentrations measured near the Solvay manufacturing plant in West Deptford Townhouse, New Jersey, and decreased amounts detected as the distance from the plant increased.

PFAS testing: solid phase extraction vs. direct injection methods

US Environmental Protection Agency (EPA) and Department of Defense (DoD) methods for testing per- and polyfluoroalkyl substances (PFAS) in drinking water require using solid phase extraction (SPE). SPE has been used extensively in environmental contaminant analysis both for concentrating large sample volumes (improving method sensitivity) and removing matrix interferences (sample cleanup).

Telling the PFAS story with pine needles

Telling the PFAS story with pine needles

As an ever-expanding group of chemicals, per- and polyfluoroalkyl substances (PFAS) require novel techniques to monitor their current and historical presence in the environment. Concerns over exposure to PFAS chemicals continue to grow, with some having known toxic characteristics and the potential effects of others remaining unknown.1 In addition, while PFAS are one of the most persistent synthetic chemicals to date, most of them hardly degrade in the environment.2 So, how long do traces of PFAS last in our environment? Two tools used to help answer this question are active samplers and passive samplers.

The hidden ingredient in anti-fog sprays: PFAS

The hidden ingredient in anti-fog sprays: PFAS

A recent study led by researchers from Duke University, conducted with colleagues from Wayne State University and the University of North Carolina at Charlotte, found that four of the top-rated anti-fog sprays contained up to 20.7 milligrams of per- and polyfluoroalkyl substances (PFAS) per milliliter of solution. This study has received a lot of exposure in popular media, and it should not be overlooked. The researchers used several creative approaches to obtain a comprehensive characterization of the anti-fog sprays, including using total organic fluorine measurements, GC-MS methods and both nominal mass and accurate mass instruments. A unique finding of the study was the detection of fluorotelomer ethoxylates (FTEOs), which are relatively unknown PFAS compounds.

Previously unknown group of PFAS compounds detected near Solvay manufacturing site in New Jersey

Previously unknown group of PFAS compounds detected near Solvay manufacturing site in New Jersey

In a recent PFAS fireside chat, Dr. John Washington from the US EPA discussed the findings of a recent study published in Science that detected a novel group of per- and polyfluoroalkyl substances (PFAS)—called chloroperfluoropolyether carboxylates (ClPFPECAs)—in soil samples from New Jersey. The study, conducted by Dr. Washington and his colleagues, detected 10 unique ClPFPECAs in these samples, with the highest concentrations measured near the Solvay manufacturing plant in West Deptford Townhouse, New Jersey, and decreased amounts detected as the distance from the plant increased.

PFAS testing: solid phase extraction vs. direct injection methods

PFAS testing: solid phase extraction vs. direct injection methods

US Environmental Protection Agency (EPA) and Department of Defense (DoD) methods for testing per- and polyfluoroalkyl substances (PFAS) in drinking water require using solid phase extraction (SPE). SPE has been used extensively in environmental contaminant analysis both for concentrating large sample volumes (improving method sensitivity) and removing matrix interferences (sample cleanup).