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| Determination of 18 Perfluorinated and Polyfluoroalkyl Compounds in Soil by Ultra Performance Liquid Chromatography－Tandem Mass Spectrometry |
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| DOI： |
| KeyWord:perfluorinated and polyfluoroalkyl compounds soil solid phase extraction ultra performance liquid chromatography－tandem mass spectrometry GenX |
| Author | Institution |
| QIAN Jia-hao，ZHU Qing-he，WAN Jiang，WANG Jia-xi，ZHANG Wei，YANG Jie |
1. State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process，East China University of Science and Technology，Shanghai ，China; 2. State Environmental Protection Engineering Center for Urban Soil Contamination Control and Remediation，Shanghai Academy of Environmental Sciences，Shanghai ，China |
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| Abstract: |
| An ultra performance liquid chromatography－tandem mass spectrometry with solid phase extraction was established for the determination of 18 perfluorinated and polyfluoroalkyl compounds（PFASs） in soil，including 14 types of perfluorocarboxylic acids，3 types of perfluorosulfonic acids and 1 perfluoroether carboxylic acid．The extraction procedure for the target pollutants was optimized by comparing extraction conditions，contained soil particle size，ultrasonic temperature，ultrasonic time，types of solid phase extraction column and eluent concentration．The optimal pretreatment conditions were as follows：the soil was sieved through 60 meshes，then ultrasonically extracted at 40 ℃ with methanol for 10 min．Then the supernatant was separated，and condensed to 1－2 mL under N2．The target was solved in ultrapure water and purified with a WAX Oasis column（150 mg/6 mL）．2 mL methanol and 4 mL methanol containing 0.1% ammonia were applied to the PFASs elution．Eluent was condensed to dryness under N2．Finally，the soil sample was concentrated into 1 mL．The target analytes were separated on an ACQUITY UPLC BEH C18 column using 5 mmol/L ammonium acetate solution and methanol as mobile phases．The negative electrospray ionization （ESI－） was utilized to analyze 18 PFASs. Results showed that there existed good linearity for 18 PFASs in the concentration range of 0.05－200 μg/L with correlation coefficients（r2） greater than 0.996．The detection limits and the quantitation limits of the method were in the ranges of 0.003－0.100 μg/L and 0.010－0.300 μg/L，respectively. The recoveries ranged from 76.3% to 132%，with relative standard deviations（RSDs） of 0.40%－11%．With simple pretreatment and high sensitivity，the method could be applied to the rapid and precise quantification of 18 PFASs including GenX in soils. |
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