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...Pfas in air sampling and analytical techniques for the identification of persistent contaminants nicola watson ph d what are compounds per polyfluoroalkyl substances a group man made chemicals that includes pfoa pfos genx many other have been manufactured used since s most extensively produced studied these both very environment human body why monitor there is evidence exposure to may lead adverse health effects such as low infant birth weights on immune system suppressing ability make antibodies cancer thyroid hormone disruption june epa adds toxics release inventory tri reportable this small subset over use public awareness has increasing part growing media coverage true case covered hollywood film dark waters released source us https www gov how currently measured lc ms drinking water methods utilizes solid phase extraction or isotope dilution anion exchange spe liquid chromatography tandem mass spectrometry combined target unique astm also exist sludge soil matrixes wider list labs...