[Technical Document] Analysis of PFOS and PFOA in Drinking Water
Introduction of analysis methods for PFOS and PFOA in tap water using LCMS.
Perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA), which are types of perfluorinated compounds (PFCs), are regulated under the "Stockholm Convention on Persistent Organic Pollutants (POPs Convention)." In Japan, as per the notification from the Director of the Water Supply Division of the Ministry of Health, Labour and Welfare (Notification No. 0330-1 to 4), the positioning of PFOS and PFOA in drinking water quality regulations was elevated from a matter requiring consideration to a water quality management target item starting in April 2020. The target value for these substances in water quality is set at a total of 50 ng/L. The testing method for water quality management target items (Target 31) specifies a method that combines solid-phase column pre-treatment with 1000-fold concentration and LC/MS measurement using reverse-phase chromatography. This report introduces an example of concentration pre-treatment and separation conducted in accordance with this testing method.
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