T/CAEPI 98-2024 Determination of perfluorooctane sulfonic acid, perfluorooctanoic acid and perfluorohexane sulfonic acid and their salts by liquid chromatography-triple quadrupole mass spectrometry (LC-MS/MS) Solid waste

Scope

Scope: This document is applicable to the determination of perfluorooctanesulfonic acid (PFOS) and its salts, perfluorooctanoic acid (PFOA) and its salts, and perfluorohexanesulfonic acid (PFHxS) and its salts in solid waste. This document is applicable to the determination of solid waste (including solid and semi-solid states) and liquid solid waste (including water-soluble and non-water-soluble states). Main technical content: This document describes the method of determining perfluorooctanesulfonic acid (PFOS), perfluorooctanoic acid (PFOA), and perfluorohexanesulfonic acid (PFHxS) and their salts in solid waste using liquid chromatography-triple quadrupole mass spectrometry. When the sampling amount of solid waste is 2 g, the final volume of the sample is 1.0 mL, and the injection volume is 5 μL, the method detection limit of PFOS (calculated as the concentration of the corresponding acid) is 0.5 μg/kg, and the determination limit is 2.0 μg/kg; the method detection limit of PFOA (calculated as the concentration of the corresponding acid) is 0.5 μg/kg, and the determination limit is 2.0 μg/kg; the method detection limit of PFHxS (calculated as the concentration of the corresponding acid) is 0.4 μg/kg, and the determination limit is 1.6 μg/kg. When the sampling amount of liquid solid waste is 50 mL, the final volume of the sample is 1.0 mL, and the injection volume is 5 μL, the method detection limit of PFOS (calculated as the concentration of the corresponding acid) is 0.4 μg/L, and the determination limit is 1.6 μg/L; the method detection limit of PFOA (calculated as the concentration of the corresponding acid) is 0.3 μg/L, and the determination limit is 1.2 μg/L; the method detection limit of PFHxS (calculated as the concentration of the corresponding acid) is 0.3 μg/L, and the determination limit is 1.2 μg/L.

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