Determination of Perfluorinated Carboxylic Acids in Soil by Accelerated Aqueous Solvent Extraction Coupled with Ultra High Performance Liquid Chromatography Tandem Mass Spectrometry
An analytical method for the determination of six perfluorocarboxylic acids(PFCs)in soil was established by accelerated aqueous solvent extraction coupled with ultra performance liquid chromatography tandem mass spectrometry(UPLC-MS/MS),and the chromatographic conditions,aqueous solvent extraction conditions,solid phase extraction column clean-up conditions and the selection of experimental materials were optimized.The results showed that the six PFCs could be analyzed on an ACQUITY UPLC BEH C18 column with 2.0 mmol/L methanol ammonium acetate aqueous solution as the mobile phase in a gradient elution mode in 9 min,and the limits of detection(LODs)were in the range of 0.03～0.4 μg/kg.The recoveries of the spiked PFCs for the determination of the actual soil samples were in the range of 90.7%～118%,and the relative standarddeviations(RSD)were5.6%～18.0%,which showed good precision and accuracy.The method is simple and easy to operate,and the instrumental detection efficiency is high with accurate results,which can meet the requirements for the determination of PFCs in soil.
Perfluorocarboxylic acidSoilAqueousAccelerated solvent extractionUltra high performance liquid chromatography tandem mass spectrometry
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