By a News Reporter-Staff News Editor at Ecology, Environment & Conservation -- Researchers detail new data in Environmental Science and Technology. According to news reporting out of Toronto, Canada, by VerticalNews editors, research stated, "Recent studies comparing the results of total organofluorine-combustion ion chromatography (TOF-CIC) to targeted analysis of perfluoroalkyl and polyfluoroalkyl substances (PFASs) by liquid chromatography tandem mass spectrometry (LC-MS/MS) have shown that a significant yet variable portion of the total organofluorine in environmental and biological samples is in the form of unknown PFASs. A portion of this unknown organofluorine likely originates in proprietary fluorinated surfactants not included in LC-MS/MS analyses and not fully characterized by the environmental science community, which may enter the environment through use in aqueous film forming foams (AFFFs) for firefighting."
Our news journalists obtained a quote from the research from the University of Toronto, "Contamination of water; biota, and soils with various PFASs due to AFFF deployment has been documented. Ten fluorinated AFFF concentrates, 9 of which were obtained from fire sites in Ontario, Canada, and two commercial fluorinated surfactant concentrates were characterized in order to identify novel fluorinated surfactants. Mixed-mode ion exchange solid phase extraction (SPE) fractionated fluorinated surfactants based on ionic character. High resolution,mass spectrometry assigned molecular formulas to fluorinated surfactant ions, while collision induced dissociation (CID) spectra assisted structural elucidation. LC-MS/MS detected isomers and low abundance fluorinated chain lengths. In total, 12 novel and 10 infrequently reported PFAS classes were identified in fluorinated chain lengths from C3 to C15 for a total of 103 compounds."
According to the news editors, the research concluded: "Further research should examine the environmental fate and toxicology of these PFASs, especially their potential as perfluoroalkyl acid (PFAA) precursors."
For more information on this research see: Identification of Novel Fluorinated Surfactants in Aqueous Film Forming Foams and Commercial Surfactant Concentrates. Environmental Science & Technology, 2014;48(1):121-129. Environmental Science & Technology can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Environmental Science & Technology - www.pubs.acs.org/journal/esthag)
Our news journalists report that additional information may be obtained by contacting L.A. D'Agostino, University of Toronto, Dept. of Chem, Toronto, ON M5S 3H6, Canada.
Keywords for this news article include: Canada, Toronto, Ontario, North and Central America, Environmental Science and Technology
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC