WebHoutz and Sedlak 2012. Environmental science & technology, 46. 9342. 2. ... • After TOP assay, PFAS levels detected in Foam A made up for 37 – 45 % and 21 – 44 % in Foam B of the TOF concentrations • Ultrashort chain PFASs (C2 and C3) are expected to be formed but not measured Web1 de jan. de 2024 · Total oxidisable precursor assay (TOP assay) can degrade and convert “unknown” per- and polyfluoroalkyl substances (PFAS) to detectable PFAS. However, …
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WebTOP Assay in Soils by LC-MS/MS. Scope and Range This procedure describes an assay by which samples can be oxidized prior to analysis, in an attempt to ... ‘Persistence of Perfluoroalkyl Acid Precursors in AFFF-Impacted Groundwater and Soil’ Houtz E F, Higgins C P, Field J A, Sedlak D L Environ. Sci. Technol. 2013 WebShe has extensive experience in the analysis of environmental and human samples for organic chemicals and specializes in the analysis of poly- and perfluoroalkyl substances (PFAS) in aqueous, soil, and blood matrices. She developed the total oxidizable precursor (TOP) assay as a new tool for quantifying difficult-to-measure PFAS. phil tippett book
Total oxidizable precursor assay in the determination of …
Web1 de nov. de 2024 · commonly used in previous TOP assay studies (Houtz and Sedlak, 2012; Janda et al., 2024; Martin et al., 2024; Zhang et al., 2024 ) were not suf cient for … Web15 de set. de 2024 · Therefore, the Houtz and Sedlak method significantly underestimated the levels of PFAS compared with the modified method, which showed a 10-fold increase … Web1 de nov. de 2024 · A promising tool is the total oxidizable precursors (TOP) assay to look for precursors by oxidation to perfluoroalkyl acids (PFAA). The TOP assay was originally developed for large volumes... phil tipler