Measurement of PFAS using combustion ion chromatography.

Non-target complementary measurement of PFAS present in aqueous samples using combustion ion chromatography for AOF (adsorbable organic fluorine).

PFAS compounds include perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS), and due to the increasing number of organic fluorine compounds that impact the environment and precursors that cannot yet be analyzed, there is a demand for the development of suitable analytical methods. As a result, there is a growing need for a single analytical workflow that can directly quantify as many PFAS as possible. Traditional ion chromatography (IC) cannot directly analyze non-ionic perfluoroalkyl substances (PFAS). However, using continuous ion chromatography (CIC), it is possible to measure organic halogen contaminants such as AOX. Unlike the conventional titration AOX method, which only measures the total organic halogens, CIC provides additional information on adsorptive organic fluorine compounds and allows for the speciation of halogens. *Please note that the ion chromatograph introduced in this application note has been discontinued. The successor model is the Thermo Scientific Dionex Inuvion IC system.*

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